MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'European Journal of Orthodontics' source. Fri, 19 Mar 2010 14:48:58 +0100 http://www.medworm.com/index.php?rid=3374816&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20231213%26dopt%3DAbstract Authors: Acar AG, Gürsoy S, Dinçer M The aim of this study was to evaluate the dentoalveolar effects of a pendulum appliance supported buccally by a K-loop, and to compare these with a cervical headgear (CHG) group. The records of 30 patients with skeletal Class I and dental Class II malocclusions were divided in to two groups: Patients in group 1 (seven females and eight males; mean age, 15.0 +/- 3.4 years) were treated with a pendulum appliance supported with a K-loop buccally, while in group 2 (10 females and 5 males; mean age, 14.2 +/- 2.9 years), the patients were treated with CHG. Standardized lateral cephalograms and study models were taken at the beginning of treatment (T0) and at the end of distal molar movement (T1). T0-T1 changes within the groups were analysed wit... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3374816 Mon, 15 Mar 2010 00:00:00 +0100 3374816 http://www.medworm.com/index.php?rid=3338632&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20203126%26dopt%3DAbstract Authors: Vucinic P, Trpovski Z, Scepan I There have been many attempts to further improve and automate cephalometric analysis in order to increase accuracy, reduce errors due to subjectivity, and to provide more efficient use of clinicians' time. The aim of this research was to evaluate an automated system for landmarking of cephalograms based on the use of an active appearance model (AAM) that contains a statistical model of shape and grey-level appearance of an object of interest and represents both shape and texture variations of the region covered by the model. Multi-resolution implementation was used, in which the AAM iterate to convergence at each level before projecting the current solution to the next level of the model. The AAM system was trained using 60 randomly selected, ha... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3338632 Thu, 04 Mar 2010 00:00:00 +0100 3338632 http://www.medworm.com/index.php?rid=3288419&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20164126%26dopt%3DAbstract The objective of this study was to assess the feasibility of virtual models as an alternative to orthodontic plaster models. Virtual dental models (obtained from OrthoCAD(R)) and corresponding plaster models of 80 patients in the permanent dentition were randomly selected from patients seeking orthodontic care. Inter-examiner error was assessed by measuring tooth width, overjet, overbite, intermolar width, intercanine width, and midline discrepancy. Criterion validity of virtual model analysis was determined by the agreement between the measurements from virtual and plaster models. Test-retest reliability was determined by remeasuring 10 virtual models 1 week later. Comparison analysis was assessed by calculating the mean directional differences and standardized directional differences. Co... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3288419 Wed, 17 Feb 2010 00:00:00 +0100 3288419 http://www.medworm.com/index.php?rid=3288418&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20164127%26dopt%3DAbstract Authors: Scougall-Vilchis RJ, Saku S, Kotake H, Yamamoto K The aim of this study was to evaluate the influence of six self-etching primers (SEPs) on the shear/peel bond strength (SPBS) of orthodontic lingual buttons. A total of 150 extracted human premolars were randomly divided into six equal groups. In all groups, the lingual buttons were bonded with BeautyOrtho Bond and the enamel was conditioned with the following-group I (Control): Primers A & B; group II: Transbond Plus SEP; group III: Clearfil Mega Bond FA; group IV: AdheSE; group V: Peak SE & Peak LC Bond; and group VI: Bond Force. The teeth were stored at 37 degrees C for 24 hours and the SPBS was tested (0.5 mm/minute). The results were calculated in mega pascals (MPa) and statistically analysed [mean, standard deviat... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3288418 Wed, 17 Feb 2010 00:00:00 +0100 3288418 http://www.medworm.com/index.php?rid=3288417&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20164128%26dopt%3DAbstract Authors: Pithon MM, Santos RL, Ruellas AC, Sant'anna EF The purpose of this study was to compare the bond strengths and to evaluate the debonding site using the adhesive remnant index (ARI) provided by a conventional acid-etch conditioner and a new self-etching adhesive system, Xeno IV (Dentsply Caulk). One hundred and eighty bovine lower incisors were randomly divided into six groups (n = 30). In groups 1, 2, and 3, Transbond XT (3M Unitek) composite was used to bond the brackets to enamel samples conditioned with 37 per cent phosphoric acid + XT primer (3M Unitek), Xeno IV + XT primer, or Xeno IV only, respectively. In groups 4, 5, and 6, the bonding procedures were performed using Fuji Ortho LC (GC Corp.) resin-modified glass ionomer cement unconditioned, enamel conditioned with 37 ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3288417 Wed, 17 Feb 2010 00:00:00 +0100 3288417 http://www.medworm.com/index.php?rid=3288420&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20159792%26dopt%3DAbstract Authors: Yamaguchi M, Hayashi M, Fujita S, Yoshida T, Utsunomiya T, Yamamoto H, Kasai K It has previously been reported that low-energy laser irradiation stimulated the velocity of tooth movement via the receptor activator of nuclear factor kappa B (RANK)/RANK ligand and the macrophage colony-stimulating factor/its receptor (c-Fms) systems. Matrix metalloproteinase (MMP)-9, cathepsin K, and alpha(v) beta(3) [alpha(v)beta3] integrin are essential for osteoclastogenesis; therefore, the present study was designed to examine the effects of low-energy laser irradiation on the expression of MMP-9, cathepsin K, and alpha(v)beta3 integrin during experimental tooth movement. Fifty male, 6-week-old Wistar strain rats were used in the experiment. A total force of 10g was applied to the rat molars... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3288420 Tue, 16 Feb 2010 00:00:00 +0100 3288420 http://www.medworm.com/index.php?rid=3255721&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20139131%26dopt%3DAbstract Authors: Demling A, Elter C, Heidenblut T, Bach FW, Hahn A, Schwestka-Polly R, Stiesch M, Heuer W Treatment with fixed orthodontic appliances can cause enamel demineralization by increased biofilm adhesion. The purpose of the present study was to investigate whether a polytetrafluoroethylene (PTFE) coating reduces biofilm formation on orthodontic brackets. One PTFE-coated bracket and one uncoated stainless steel bracket were bonded symmetrically on the first or second (four maxillary and nine mandibular) primary molars in 13 adolescent patients (five females and eight males, aged 11.2 +/- 2.8 years; four dropouts) for 8 weeks. Quantitative biofilm formation on brackets was analysed with the Rutherford backscattering detection (RBSD) method, a scanning electron microscopy technique. A t... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3255721 Fri, 05 Feb 2010 00:00:00 +0100 3255721 http://www.medworm.com/index.php?rid=3255720&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20139132%26dopt%3DAbstract Authors: Kao CT, Huang TH The aim of this study was to assess the surface characteristics and to compare the corrosion potential of metal brackets and wires in environments containing different media. Four brands of metal brackets and two types of orthodontic wires [stainless steel and nickel-titanium (NiTi)] were investigated. An electrochemical assay was used to compare the corrosion potential (V) of the brackets and wires in different electrolyte media at 37 degrees C. The test media were acidulated sodium fluoride (NaF) and pH 4 and pH 6 artificial saliva solutions. The data were analysed using analysis of variance with a predetermined significance level of alpha = 0.05. Scanning electron microscopy (SEM) was used to observe surface defects and corrosion. The results of the potenti... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3255720 Fri, 05 Feb 2010 00:00:00 +0100 3255720 http://www.medworm.com/index.php?rid=3247253&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20133513%26dopt%3DAbstract Authors: Cuoghi OA, Sella RC, de Mendonça MR The purpose of the present research was to compare the normal average values of mesiodistal axial angulation, with the mesiodistal axial angulation of canines, premolars and mandibular molars in individuals with and without the presence of the mandibular third molars. Panoramic radiographs of 19 male and 21 female Caucasians, with a mean age of 22.35 years, who had not undergone orthodontic treatment were studied. The subjects were divided into two groups: group I, 20 radiographs of subjects without, and group II, 20 radiographs of subjects with mandibular third molars. The mean values of the groups were compared using a Student's t-test. The results show that, in both groups, the mandibular premolars and molars had enhanced angulation ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3247253 Thu, 04 Feb 2010 00:00:00 +0100 3247253 http://www.medworm.com/index.php?rid=3247252&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20133514%26dopt%3DAbstract Authors: Sattarzadeh AP, Lee RT The first aim of this study was to identify any difference in the perception of facial normality between orthodontists and lay people of patients with the initial presentation of a Class II division 1 malocclusion, the second is to investigate whether there was an identifiable facial change following Twin Block (TB) therapy, and lastly, the relationship between identifiable facial change and clinical measurements was explored. Animated laser scans of 16 randomly selected adolescent patients, nine males aged 12-14 years and seven females aged 11-13 years with Class II division 1 malocclusions before and after TB therapy, were assessed on a visual analogue scale (VAS) by 34 orthodontists and 35 lay people. The 'Mark and Measure' and 'Orientated' techniques... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3247252 Thu, 04 Feb 2010 00:00:00 +0100 3247252 http://www.medworm.com/index.php?rid=3221320&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20106996%26dopt%3DAbstract Authors: Momeni Danaei S, Salehi P Self-perception of dental attractiveness is an important factor affecting orthodontic treatment need. The purpose of this study was to investigate the association between normative and self-perceived orthodontic treatment need and to evaluate the influence of gender and socioeconomic background such as family size, parental education and father's employment. The subjects were 900 male and female junior high school students (450 males, 450 females) aged 12-15 years, from four districts in the city of Shiraz, Iran. The participants were asked to complete a questionnaire and then underwent a dental examination. Normative treatment need was assessed clinically using the Dental Aesthetic Index (DAI) according to the World Health Organization guidelines. St... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3221320 Wed, 27 Jan 2010 00:00:00 +0100 3221320 http://www.medworm.com/index.php?rid=3221319&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20106997%26dopt%3DAbstract In this study, the tissue response to IFN-gamma-loaded collagen scaffolds was evaluated after implantation in the palate of rats. Scaffolds, with or without IFN-gamma, were implanted submucoperiosteally in the palate of two groups of 25 five-week-old male Wistar rats. Groups of five rats were sacrificed at 1, 2, 4, 8, and 16 weeks post-implantation and processed for histological analyses. On haematoxylin and eosin-stained sections, the cell density and number of giant cells within the scaffolds were determined. Blood vessels, inflammatory cells, and myofibroblasts were detected by immunohistochemistry. The data for cell density, blood vessels, and giant cells were compared with a two-way analysis of variance. The scores for myofibroblasts and inflammation were compared by a rank sum test. ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3221319 Wed, 27 Jan 2010 00:00:00 +0100 3221319 http://www.medworm.com/index.php?rid=3213424&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20100785%26dopt%3DAbstract Authors: Baysal A, Uysal T, Ozdamar S, Kurt B, Kurt G, Gunhan O The aim of this study was to histologically evaluate and compare the effects of the systemic administration of l-thyroxine (TX) and doxycycline (DX) on orthodontically induced root resorption, Twenty-eight male 50- to 60-day-old Wistar rats were used. Seven rats served as the baseline control. Seven animals received TX (20 mug/kg bodyweight/day) and seven DX (1.2 mg/kg bodyweight/day), by means of a mini-osmotic pump implanted subcutaneously. Seven rats were separated as a sham, in order to evaluate the pure effect of the surgical procedure on the animals' health. Tooth movement (TM) was achieved with a continuous force of 50 g by placing Elgiloy coil springs between the right maxillary first molar and incisors for 14 days... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3213424 Mon, 25 Jan 2010 00:00:00 +0100 3213424 http://www.medworm.com/index.php?rid=3206997&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20097701%26dopt%3DAbstract Authors: Bugaighis I, O'Higgins P, Tiddeman B, Mattick C, Ben Ali O, Hobson R This prospective cross-sectional, case-controlled morphometric study investigated three-dimensional facial morphological variation among and between 8- and 12-year-old children [40 with a unilateral cleft lip and palate (UCLP), 23 with a unilateral cleft lip and alveolus (UCLA), 19 with a bilateral cleft lip and palate (BCLP), and 21 with an isolated cleft palate (ICP)]. Eighty gender- and age-matched individuals comprised the control group. The mean shape of each group was computed using generalized Procrustes analysis (GPA). Differences in shape between group means were assessed using multivariate analysis of variance and permutation tests, and shape differences were visualized for interpretation using warp... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3206997 Fri, 22 Jan 2010 00:00:00 +0100 3206997 http://www.medworm.com/index.php?rid=3198122&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20089569%26dopt%3DAbstract Authors: Ciccone de Faria TD, Hallak Regalo SC, Thomazinho A, Vitti M, de Felício CM The aim of this study was to compare the electromyographic (EMG) characteristics of masticatory muscles in children with either a skeletal or dentoalveolar open bite, compared with a control group (CG). Forty-five children (31 boys and 14 girls), aged 6-11 years, were included in the study, 15 with a skeletal anterior open bite (SAOB), 15 with a dentoalveolar anterior open bite (DAOB), and 15 with a normal occlusion (CG), defined by clinical evaluation and lateral cephalograms. EMG recordings of the temporal and masseter muscles were performed under maximal voluntary clenching and during chewing. Analysis of variance was used for inter-group analysis, followed by the Tukey post hoc test. A Student... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3198122 Wed, 20 Jan 2010 00:00:00 +0100 3198122 http://www.medworm.com/index.php?rid=3198121&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20089570%26dopt%3DAbstract Authors: Gazit-Rappaport T, Haisraeli-Shalish M, Gazit E The purpose of this study was to assess the short-term psychosocial impact of dental aesthetic improvement in adult subjects. Sixty-nine adult patients (61 females and 8 males, aged 21-59 years) requesting aesthetic dental improvement were prospectively and randomly recruited for the study in a private orthodontic office. A general interview included patient motivation and expectations from treatment. After clinical examination, discussion of the mode of treatment and the expected outcome, the patients were requested to complete the Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) with several additions. The duration of their treatment was 6-14 months, and the main goals were tooth alignment, crowding alleviation, o... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3198121 Wed, 20 Jan 2010 00:00:00 +0100 3198121 http://www.medworm.com/index.php?rid=3198120&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20089571%26dopt%3DAbstract Authors: Türkkahraman H, Adanir N, Gungor AY, Alkis H The aims of this study were to test whether the shear bond strengths (SBS) of three commercially available colour change adhesives (CCAs), Transbond Plus Color Change Adhesive, Grēngloo, and Blūgloo, are different and to compare their bond strengths with a traditional light cure adhesive, Light Bond. Forty-eight human permanent premolar teeth extracted for orthodontic reasons and without any caries or visible defects were used in this study. The brackets were bonded with Light Bond (group I), Grēngloo (group II), Blūgloo (group III), and Transbond Plus CCA (group IV). After bonding, the SBS of the brackets were tested with a Universal testing machine. Analysis of variance indicated a significant differen... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3198120 Wed, 20 Jan 2010 00:00:00 +0100 3198120 http://www.medworm.com/index.php?rid=3198119&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20089572%26dopt%3DAbstract Authors: Lambrechts H, De Baets E, Fieuws S, Willems G The contribution of the force of the lips, cheeks, and tongue is of particular interest in planning treatment. Thus, the aim of this study was to determine if there are differences in lip and tongue pressure as a function of gender, age, Angle classification, characteristics of occlusion, and oral habits. This cross-sectional study comprised 107 subjects (63 females and 44 males), between 7 and 45 years of age (median 15.2 years), seeking orthodontic treatment. The patients were characterized by the variables gender, age, Angle classification, the characteristics of the occlusion, and oral habits. Lip and tongue pressure were measured with a Myometer 160 and the obtained values were statistically analysed (Kruskal-Wallis and Mann-W... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3198119 Wed, 20 Jan 2010 00:00:00 +0100 3198119 http://www.medworm.com/index.php?rid=3189874&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20083808%26dopt%3DAbstract Authors: de Bondt B, Aartman IH, Zentner A General dental practitioners (GDPs) act as gatekeepers for specialist dental care since they generally decide whether, when, and where to refer patients. It is important for orthodontists to understand the factors influencing the referral decision in order to be able to satisfy both the referring dentists and the patients. A specifically designed questionnaire was sent to a random sample of 634 GDPs in The Netherlands. In part A, general characteristics of the GDPs such as gender, years in practice, number of patients in the practice, possibilities to refer to an orthodontist, and number of patients referred to the orthodontist per year were collected. Part B assessed the importance of 20 various factors related to the GDPs' usual referral dec... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3189874 Mon, 18 Jan 2010 00:00:00 +0100 3189874 http://www.medworm.com/index.php?rid=3189873&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20083809%26dopt%3DAbstract The objective of this study was to evaluate asymmetry of the parental craniofacial skeleton of subjects with a cleft lip, with or without cleft palate [CL(P)], and isolated cleft palate (CP). The postero-anterior (PA) cephalograms of 52 parents of children with CL(P) and 40 parents of children with CP from a sample of 196 children with non-syndromic clefts in the west of Scotland were analysed. A conventional cephalometric asymmetry analysis was used to evaluate size-related right:left asymmetry comprising eight linear distances, nine angular, and three facial area measurements. Right:left ratios of the mean values identified the direction of the asymmetry and two-sample t-tests determined statistical significance. A shape-related asymmetry analysis was also undertaken. The configurations ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3189873 Mon, 18 Jan 2010 00:00:00 +0100 3189873 http://www.medworm.com/index.php?rid=3189878&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20080958%26dopt%3DAbstract The objectives of this in vitro study were to evaluate the shear bond strength (SBS) and failure mode of a recently introduced fluoride-releasing adhesive, as well as the comparison with established orthodontic adhesives. Sixty bovine mandibular incisors were randomly allocated to three groups (n = 20): stainless steel brackets were bonded with Transbond Plus Color Change Adhesive, Transbond XT, or Light Bond. A universal testing machine was used to determine the SBS at a crosshead speed of 1 mm/minute. After debonding, the adhesive remnant index (ARI) was used to assess the adhesive remaining on the brackets. One-way analysis of variance comparing the three experimental groups showed no differences between the bonding systems for mean SBS (P = 0.27). ARI scores showed more residual adhesi... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3189878 Fri, 15 Jan 2010 00:00:00 +0100 3189878 http://www.medworm.com/index.php?rid=3189877&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20080959%26dopt%3DAbstract Authors: Springate SD The purpose of this study was to locate stable natural reference structures (NRS) in the mandible as seen on lateral cephalometric radiographs. The material consisted of pairs of serial radiographs of 34 children (15 males and 19 females aged 8.7-14.3 years at the initial radiograph, with a mean interval of 4.1 years between radiographs). Each child had three Björk type tantalum implant markers in the left side of the mandible. The pairs of radiographs were converted to digital image format, superimposed, and registered using stable implants. Potential NRS were located by visual examination of the superimposed images. The morphological and spatial stability of these potential NRS were tested using automated computer-based analysis employing cross-correlation.... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3189877 Fri, 15 Jan 2010 00:00:00 +0100 3189877 http://www.medworm.com/index.php?rid=3189876&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20080960%26dopt%3DAbstract Authors: Uysal T, Ustdal A, Nur M, Catalbas B The aim of this in vitro study was to compare the shear bond strength (SBS) and failure modes of a conventional resin-based composite with a recently developed amorphous calcium phosphate (ACP)-containing orthodontic composite system. Forty freshly extracted human maxillary premolar teeth were randomly divided into two equal groups. Conventional composite (group 1; Transbond-XT(R); 3M Unitek) and ACP-containing orthodontic composite (group 2; Aegis-Ortho(R); Harry J. Bosworth Co.) were used for bonding ceramic orthodontic brackets. The SBS of these brackets were measured and recorded in megapascals (MPa). Adhesive remnant index (ARI) scores were determined after bracket failure. Data were analysed with a Student's t-test for two independent... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3189876 Fri, 15 Jan 2010 00:00:00 +0100 3189876 http://www.medworm.com/index.php?rid=3189875&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20080961%26dopt%3DAbstract Authors: Tynelius GE, Bondemark L, Lilja-Karlander E The aim of this study was to use a randomized controlled trial methodology to evaluate and compare three different retention methods. The capacity of the retention methods to retain orthodontic treatment results was in this first phase analysed on a short-term basis, i.e. after 1 year of retention. The subjects were recruited from adolescents undergoing fixed appliance treatment at an orthodontic clinic in the National Health Service (NHS) in Sweden between 2001 and 2007. Seventy-five patients (45 girls and 30 boys with a mean age of 14.4 years at the start of retention) were randomized into three retention systems; a vacuum-formed retainer in the maxilla and bonded canine-to-canine retainer in the mandible (group V-CTC), a vacuum-fo... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3189875 Fri, 15 Jan 2010 00:00:00 +0100 3189875 http://www.medworm.com/index.php?rid=3165473&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20064837%26dopt%3DAbstract Authors: Jones L, Thomsen JS, Barlach J, Mosekilde L, Melsen B Zinc has been demonstrated to play an important role in bone metabolism and is required for normal growth. However, no studies have investigated the influence of zinc on calvarial bone healing in aged or adult rats. The aim of the study was to evaluate whether alimentary zinc supplementation and depletion affect bone healing of calvarial defects implanted with osteopromotive substances in adult rats. Two 5 mm full thickness critical size bone defects were trephined in the central part of each parietal bone of 60 six-month-old male Wistar rats. The bone defects were filled with demineralized bone matrix (DBM), autogenous bone chips, or were left as unfilled controls. The rats were divided into three groups of 20 rats each an... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3165473 Mon, 11 Jan 2010 00:00:00 +0100 3165473 http://www.medworm.com/index.php?rid=3156782&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20053717%26dopt%3DAbstract Authors: Yüksel S, Kaygisiz E, Ulusoy C, Keykubat A The purpose of this study was to evaluate changes in dentofacial growth before, during, and after use of a magnetic activator device (MAD) II in high-angle Class II division 1 patients. Lateral cephalometric and hand-wrist radiographs of 10 patients (six girls and four boys) with an average chronological age of 10 years 5 months were obtained at the beginning of the observation period (T1, 9.5 months), beginning of MAD II application (T2), at the end of the treatment (T3), and approximately 4 years after the end of treatment (T4). Thirteen linear, 1 ratio, and 10 angular measurements were evaluated. Paired t-tests were used for statistical evaluation of differences that occurred between the time points. The increase in gonial ang... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3156782 Wed, 06 Jan 2010 00:00:00 +0100 3156782 http://www.medworm.com/index.php?rid=3156781&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20053718%26dopt%3DAbstract Authors: Liu SS, Kyung HM, Buschang PH While both intermittent and continuous forces are commonly used to expand sutures, it remains unclear which force is most effective. Using nickel-titanium (NiTi) open coil springs (50 g) and 3 mm long miniscrew implants (MSIs) for skeletal anchorage, intermittent and continuous forces were used to expand the midsagittal sutures in 18 New Zealand white juvenile male rabbits, 11 weeks of age, for 29 days. In the intermittent group, expansion forces of 50 g were delivered for 5 days (on) and paused for 1 day (off); the on/off cycles were repeated five times. Expansion forces of 50 g were delivered for 29 consecutive days in the continuous group. Longitudinal biometric and histomorphometric analyses were performed to evaluate sutural separation and bo... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3156781 Wed, 06 Jan 2010 00:00:00 +0100 3156781 http://www.medworm.com/index.php?rid=3156780&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20053719%26dopt%3DAbstract Authors: Kilic N, Catal G, Kiki A, Oktay H The dentoskeletal effects of maxillary protraction (MP) therapy have been extensively investigated, while those relating to soft tissue profile changes are limited. Thus, the aim of this study was to determine the degree of soft tissue profile changes following MP therapy. The material consisted of the cephalometric films of 24 female subjects (12.69 +/- 1.08 years) with a Class III malocclusion who underwent MP therapy; these were compared with a control group of 15 females (12.13 +/- 0.63 years) with a Class I occlusion and matched for chronological age and observation period. Cephalometric films were available for all subjects before (T1) and after (T2) treatment/observation. The initial measurements and treatment/control changes were compa... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3156780 Wed, 06 Jan 2010 00:00:00 +0100 3156780 http://www.medworm.com/index.php?rid=3123589&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20034994%26dopt%3DAbstract Authors: Wu JC, Huang JN, Lin XP The purpose of this research was to investigate the potential use of intraoral transosseous stainless steel wires as anchorage for intrusion of the lower incisors using a rabbit model. Placement of intraoral transosseous stainless steel wires around incisors is similar to that of intraoral transosseous wiring of edentulous mandibular fractures. Ten male New Zealand rabbits, 9 +/- 1.5 months of age, average weight 1.8 +/- 0.3 kg, were used in this study. One lower incisor was intruded with a 50 g bilateral force using a coil spring for 10 weeks, while the other incisor served as the control. Clinical measurements of the distances between the occlusal edges of the incisors (EE) were performed weekly with a calliper. In addition to standard descriptive sta... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3123589 Thu, 24 Dec 2009 00:00:00 +0100 3123589 http://www.medworm.com/index.php?rid=3115824&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20022892%26dopt%3DAbstract Authors: Leonardi RM, Giordano D, Maiorana F, Greco M The aim of this study was to evaluate the accuracy of some commonly used cephalometric landmarks of monitor-displayed images with and without image emboss enhancement. The following null hypothesis was tested: there is no improvement in landmark detection accuracy between monitor-displayed images, with and without image embossing enhancement. Forty lateral cephalometric radiographs, taken from the data files of subjects were used in this study. A purpose-made software allowed recording of the cephalometric points and then, with the help of algorithms based on cellular neural networks, to transfer the previously processed radiographs into an embossed image. Five observers recorded 22 landmarks on the displayed images from the two ima... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3115824 Fri, 18 Dec 2009 00:00:00 +0100 3115824 http://www.medworm.com/index.php?rid=3105870&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20018795%26dopt%3DAbstract Authors: Wedrychowska-Szulc B, Janiszewska-Olszowska J, Stepien P The aim of the investigation was to compare overall and anterior Bolton ratios in different malocclusion groups with Bolton's standards. The material comprised 600 pre-treatment study casts (262 males and 338 females, aged 12-25 years), selected from the models of 3088 patients who had applied for orthodontic treatment based on the following criteria: permanent dentition from the first right molar to the first left molar and no interproximal caries or restorations. There were 162 Class I, 144 Class II division 1, 155 Class II division 2, and 139 Class III patients. Statistical analysis of the data was undertaken using a Student's t-test. Statistically significant differences were found for the mean overall ratio when com... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3105870 Wed, 16 Dec 2009 00:00:00 +0100 3105870 http://www.medworm.com/index.php?rid=3105869&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20018796%26dopt%3DAbstract Authors: Lahlou K, Bahoum A, Makhoukhi MB, Aalloula EH The aim of this retrospective study was to evaluate bimaxillary protrusion among Moroccans and to compare the Moroccan population with other Arabic, Caucasian, and Mediterranean populations. Cephalometric radiographs of 102 Moroccan adult university students (73 females and 29 males, mean age: 21 years 6 months +/- 1 year 6 months) with a normal occlusion were traced. Fifteen measurements concerning the upper and lower incisors, upper and lower lips, and the Frankfort to mandibular plane angle were assessed. Statistical analysis of the data was undertaken using independent t-tests. Eight angular and six linear measurements were statistically significantly different compared with Caucasian cephalometric norms (P < 0.001). Signifi... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3105869 Wed, 16 Dec 2009 00:00:00 +0100 3105869 http://www.medworm.com/index.php?rid=3105868&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20018797%26dopt%3DAbstract Authors: Sari E, Kadioglu O, Ucar C, Altug HA The purpose of this study was to compare Prostaglandin E(2) (PGE(2)) levels in gingival crevicular fluid (GCF) of young adults with maxillary constriction during tooth- and bone-borne expansion. Thirty patients, 15 females and 15 males, with a mean age of 17.3 +/- 2.8 years were divided into three groups. Group I consisted of 10 patients, five females and five males, treated by transpalatal distraction (TPD) as a bone-borne device, group II 10 patients, five females and five males, with a Hyrax appliance as a tooth-borne device, and a control group of 10 patients, five females and five males, without any expansion appliances. GCF samples were collected with filter paper strips at six observation periods in order to evaluate the effect of he... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3105868 Wed, 16 Dec 2009 00:00:00 +0100 3105868 http://www.medworm.com/index.php?rid=3105867&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D20018798%26dopt%3DAbstract Authors: Wu AK, McGrath C, Wong RW, Wiechmann D, M Rabie AB The aim of this prospective longitudinal study was to compare pain experiences among Chinese adult patients treated with labial and lingual orthodontic appliances. Sixty patients, 30 with labial appliances (18 females and 12 males, mean age 20.33 years, SD +/- 4.205) and 30 with lingual appliances (22 females and 8 males, mean age 21.63 years, SD +/- 2.236), rated their overall pain experience on a 100 mm visual analogue scale (VAS) at three time points: 1 week (T(1)), 1 month (T(2)), and 3 months (T(3)) after bracket placement. In addition, on a separate 100 mm VAS, they rated their pain experience at the locations of the tongue, lips, cheeks, gums, face, and jaw at T(1), T(2), and T(3). Changes in pain VAS were conducted usi... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3105867 Wed, 16 Dec 2009 00:00:00 +0100 3105867 http://www.medworm.com/index.php?rid=3076253&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19969525%26dopt%3DAbstract Authors: Yuasa T, Iijima M, Ito S, Muguruma T, Saito T, Mizoguchi I The effects of 2 years of storage and 6000 thermocycles on the shear bond strength (SBS) of two self-etching adhesive systems were studied. Two self-etching primer (SEP) systems (Transbond Plus and Beauty Ortho Bond) and one etch and rinse system (Transbond XT) were used to bond brackets to 126 human premolars that were then stored in artificial saliva for 24 hours or 2 years and thermocycled in distilled water before SBS testing with a universal testing machine. The adhesive remnant index (ARI) scores were calculated. Data were compared by two-way analysis of variance and chi-square analysis. Enamel/adhesive interfaces were examined by scanning electron microscopy. There was no significant difference in the mean SBS f... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3076253 Sun, 06 Dec 2009 00:00:00 +0100 3076253 http://www.medworm.com/index.php?rid=3059221&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19959609%26dopt%3DAbstract Authors: Stivaros N, Lowe C, Dandy N, Doherty B, Mandall NA The aim of this trial was to evaluate whether a Nance or Goshgarian palatal arch was most effective for prevention of mesial drift, distal tipping, prevention of mesio-palatal rotation of the upper first permanent molars, and patient comfort and ease of removal. Patients were recruited from a district general hospital and a specialist orthodontic practice and randomly allocated to a Goshgarian (n = 29) or a Nance (n = 28) group. Pre-treatment study models (T1) were taken followed by the placement of the palatal arch, premolar extractions, and upper and lower fixed appliances. The clinical end point was 6 months (T2), at which time, an impression for an upper study model was taken. The amount of upper first permanent molar mesi... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3059221 Thu, 03 Dec 2009 00:00:00 +0100 3059221 http://www.medworm.com/index.php?rid=3059220&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19959610%26dopt%3DAbstract Authors: Pandis N, Polychronopoulou A, Makou M, Eliades T The purpose of this study was to investigate the effect of treatment of mandibular crowding with self-ligating and conventional brackets on dental arch variables. Fifty-six patients were selected from a pool of subjects satisfying the following inclusion criteria: non-extraction treatment in the mandibular or maxillary arches, eruption of all mandibular teeth, no spaces and an irregularity index greater than 2 mm in the mandibular arch, and no adjunct treatment such as etxra- or intraoral appliances. The patients were assigned to two groups: one group received treatment with the self-ligating bracket and the other with a conventional edgewise appliance, both with a 0.022 inch slot. Lateral cephalometric radiographs obtained at t... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3059220 Thu, 03 Dec 2009 00:00:00 +0100 3059220 http://www.medworm.com/index.php?rid=3059219&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19959611%26dopt%3DAbstract Authors: Bock NC, von Bremen J, Kraft M, Ruf S The aim of this randomized clinical trial was to compare the plaque control effectiveness and handling of an interdental brush with a short curved handle and a triangular cross-section of the brush head (IDB) and an interdental brush with a long straight handle in combination with a monotufted brush head (MTB). In a split-mouth design, 110 multibracket patients were randomly assigned to group A using the MTB in the first and third quadrants and the IDB in the second and fourth quadrants or to group B who proceeded the other way around. A crossover was performed after 3 months. The plaque index (PI) was scored every 6 weeks for a period of 24 weeks, and handling was evaluated using visual analogue scales (VAS). Wilcoxon tests were used to d... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3059219 Thu, 03 Dec 2009 00:00:00 +0100 3059219 http://www.medworm.com/index.php?rid=3059218&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19959612%26dopt%3DAbstract Authors: Nicolás AI, Vicente A, Bravo LA The aims of this study were to evaluate the effect on shear bond strength (SBS), adhesive remnant, and enamel surface of repeated bonding of new brackets on the same tooth using different methods of enamel conditioning. One hundred and thirty-five bovine incisors were used. Brackets were bonded to enamel using one of the following conditioning procedures: (1) 37 per cent phosphoric acid, (2) 37 per cent phosphoric acid (prior to first bond but not for further bonds), (3) Transbond Plus Self Etching Primer(R) (TSEP), and (4) non-rinse-conditioner (NRC). Brackets were sequentially bonded and debonded three times following the same conditioning procedure with the exception of group 2 where 37 per cent phosphoric acid was not reapplied prior to... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3059218 Thu, 03 Dec 2009 00:00:00 +0100 3059218 http://www.medworm.com/index.php?rid=3004526&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19917626%26dopt%3DAbstract Authors: Vandevska-Radunovic V, Murison R The aim of the study was to investigate the effect of emotional stress on apical root resorption (ARR) and tooth displacement during orthodontic tooth movement in rats. A further area of interest was to evaluate if the expression of interleukin-1 alpha (IL-1alpha) as well as the density and distribution of peptidergic nerve fibres immunoreactive to calcitonin gene-related peptide (CGRP) in the periodontal ligament (PDL) are associated with possible stress-induced changes in root resorption and tooth movement. A total of 52 male Wistar rats, aged 6 weeks, were divided in three experimental and one control group (n = 4). Group 1 had orthodontic tooth movement and received foot shocks (OTMS; n = 16), group 2 had orthodontic tooth movement but rece... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=3004526 Mon, 16 Nov 2009 00:00:00 +0100 3004526 http://www.medworm.com/index.php?rid=2978793&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19901039%26dopt%3DAbstract The objectives of this study were to evaluate the assessments of maxillofacial surgeons, orthodontists, and laypersons on the predicted aesthetic outcome of various surgical options in Class III correction and the associations between certain initial cephalometric values and the judges' preferred option. Pre-surgical lateral headfilms and coloured profile photographs of 18 skeletal Class III Caucasian adult patients (10 males and 8 females) with a mean age of 24.5 years were used. The headfilms were hand traced and digitized. Conventional cephalometric analysis was performed. Computerized predictions of three surgical options, mandibular setback, Le Fort I advancement, and bimaxillary surgery, were made. For each case, the pre-surgical profile photograph with the three predictions was pres... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2978793 Mon, 09 Nov 2009 00:00:00 +0100 2978793 http://www.medworm.com/index.php?rid=2978792&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19901040%26dopt%3DAbstract Authors: Liégeois F, Albert A, Limme M The aim of this study was to measure lingual volume and to correlate it with and predict it from the area of the radiographic shadow of the tongue as well as with demographic and biometric characteristics. In 70 healthy subjects (35 males and 35 females) aged between 20 and 37 years, tongue volume was determined using magnetic resonance imaging (MRI). Volumes were correlated with the area of the tongue on the sagittal plane determined from the lingual shadow on profile cephalometric radiographs. Demographic and biometric characteristics were also available for each subject. The mean lingual volume was 79.5 +/- 14.2 cm(3) and was gender dependent. The mean lingual volume was 89.9 +/- 11.5 and 68.9 +/- 7.0 cm(3) in males and females, respective... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2978792 Mon, 09 Nov 2009 00:00:00 +0100 2978792 http://www.medworm.com/index.php?rid=2970577&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19892719%26dopt%3DAbstract Authors: Merone G, Valletta R, De Santis R, Ambrosio L, Martina R The aim of this research was to investigate the retention of a bracket equipped with a novel base, the R-system(R). The design of the bracket base is characterized by concentric grooves. The behaviour of this bracket was compared with a bracket with a conventional mesh base from the same manufacturer. Thirty lower adult bovine incisors were selected and metallic brackets were bonded using the Concise adhesive system. Each bracket-adhesive-enamel interface was investigated according to torsion debonding. One-way analysis of variance was used for statistical evaluation. Finite element analysis was also undertaken. In order to assess if the technique was detrimental to the enamel, the mode of failure was determined using th... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2970577 Thu, 05 Nov 2009 00:00:00 +0100 2970577 http://www.medworm.com/index.php?rid=2944661&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19875744%26dopt%3DAbstract In conclusion, MC did not tolerate moisture. MLS was also affected but maintained sufficient adherence. PMID: 19875744 [PubMed - as supplied by publisher] (Source: European Journal of Orthodontics) European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2944661 Thu, 29 Oct 2009 00:00:00 +0100 2944661 http://www.medworm.com/index.php?rid=2937147&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19861582%26dopt%3DAbstract Authors: Spalj S, Slaj M, Varga S, Strujic M, Slaj M Patients' and parents' perception of malocclusion are important in determining orthodontic treatment demand, motivation, and cooperation. The aim of this study was to investigate differences in perception of treatment need in currently orthodontically treated, previously treated, and untreated subjects. The sample comprised 3196 children and adolescents (1593 males and 1603 females) aged 8-19 years (mean age 13.0 +/- 3.6 years) from 24 randomly selected public schools in Zagreb, Croatia. Objective treatment need was assessed clinically using the Dental Aesthetic Index (DAI). Subjective treatment need was estimated separately by an orthodontic resident, the child/adolescent and his/her parent using the Standardized Continuum of Aesthe... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2937147 Tue, 27 Oct 2009 00:00:00 +0100 2937147 http://www.medworm.com/index.php?rid=2937151&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19858075%26dopt%3DAbstract Authors: Uysal T, Ulker M, Baysal A, Usumez S The aim of this study was to test the hypothesis that there is no difference in the microleakage values of a newly developed amorphous calcium phosphate (ACP)-containing adhesive and a conventional lingual retainer composite at the composite-enamel and composite-wire interfaces of flexible spiral wire retainers (FSWRs). Sixty freshly extracted human mandibular incisors separated into three equal groups were used in this study. Multi-stranded 0.0215 inch diameter wire was bonded to enamel using conventional orthodontic adhesive (Transbond LR, 3M Unitek) and ACP-containing composite (Aegis Ortho, Harry J. Bosworth Co.), with or without the use of a primer. The specimens were sealed with nail varnish, stained with 0.5 per cent basic fuchsine f... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2937151 Sun, 25 Oct 2009 00:00:00 +0100 2937151 http://www.medworm.com/index.php?rid=2937150&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19858076%26dopt%3DAbstract Authors: Uysal T, Baysal A, Usumez S, Ulker M The aim of this investigation was to test the hypothesis that there is no difference in microleakage between composite-enamel and composite-wire interfaces, when different composites are used. Forty-five freshly extracted human mandibular incisors separated into three groups were used in the study. Multi-stranded 0.0215 inch diameter wire was bonded to enamel using two conventional (Transbond XT and Transbond LR) and a flowable (Venus Flow) orthodontic composite. The specimens were sealed with nail varnish, stained with 0.5 per cent basic fuchsine for 24 hours, sectioned and examined under a stereomicroscope, and scored for microleakage at the composite-enamel and composite-wire interfaces from the mesial and distal margins. Statistical ana... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2937150 Sun, 25 Oct 2009 00:00:00 +0100 2937150 http://www.medworm.com/index.php?rid=2913248&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19840975%26dopt%3DAbstract Authors: Fujimura Y, Kitaura H, Yoshimatsu M, Eguchi T, Kohara H, Morita Y, Yoshida N Mechanical stress such as orthodontic tooth movement induces osteoclastogenesis. Sometimes, excessive mechanical stress results in root resorption during orthodontic tooth movement. It has been reported that bisphosphonate inhibits osteoclastogenesis. Recently, there have been concerns for orthodontic patients receiving bisphosphonates. Thus, the aim of this study was to investigate the effect of bisphosphonates on orthodontic tooth movement and root resorption in mice. A nickel-titanium (Ni-Ti) closed coil spring delivering a force of 10 g was inserted between the upper anterior alveolar bone and the first molar in 8-week-old male C57BL/6 mice. Bisphosphonate (2 mug/20 mul) was injected daily into a ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2913248 Sun, 18 Oct 2009 23:00:00 +0100 2913248 http://www.medworm.com/index.php?rid=2913250&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19837746%26dopt%3DAbstract The objective of this study was to compare glass fibre reinforced (GFR) with multistranded bonded orthodontic retainers in terms of success rate and periodontal implications. A 2 year parallel study was conducted of 184 patients scheduled to receive bonded retainers in the upper and lower anterior segments. In three centres, the patients (mean age 14 years; 90 males and 94 females) were sequentially assigned to receive GFR retainers containing 500 unidirectional glass fibres (GFR500), 1000 unidirectional glass fibres (GFR1000), or multistranded retainers (gold standard). Retainer failures and periodontal conditions were monitored every 6 months. In a control group of 90 subjects without retainers, periodontal conditions were examined (negative control). Of the 274 recruited patients, 15 dr... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2913250 Thu, 15 Oct 2009 23:00:00 +0100 2913250 http://www.medworm.com/index.php?rid=2913249&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19837747%26dopt%3DAbstract Authors: Gomes RR, da Fonseca JA, Paula LM, Faber J, Acevedo AC The purpose of this retrospective study was to determine the prevalence of hypodontia and associated dental anomalies in patients undergoing orthodontic treatment in Brasília, Brazil, over a 2 year period (1998-2000). The records of 1049 orthodontic patients between 10 and 15.7 years of age (507 males and 542 females) from 16 orthodontic clinics were analysed. Descriptive statistics were performed for the study variables. A chi-square test was used to determine the difference in the prevalence of hypodontia between genders. The prevalence of hypodontia was 6.3 per cent (39.4 per cent males and 60.6 per cent females) with no statistically significant difference between the genders. One case of oligodontia was observed.... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2913249 Thu, 15 Oct 2009 23:00:00 +0100 2913249 http://www.medworm.com/index.php?rid=2899290&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19828592%26dopt%3DAbstract This study was a randomized clinical trail, conducted in a district general hospital. Sixty-two participants were enrolled in the study. Group 1, full-time wear, consisted of 30 patients (12 males and 18 females, aged 13.6 +/- 1.5 years) and group 2, part-time wear, 32 patients (14 males and 18 females, aged 13.8 +/- 1.5 years). Each patient was assigned to one of the groups by random number generation. Clinical records in the form of study models were taken at the start of active treatment (T1), at debond (T2), 6 months into the retention phase (T3), and 1 year post-debond (T4). The irregularity index, intercanine width, intermolar width, arch length, overbite, overjet, and Peer Assessment Rating (PAR) scores were measured on study models using digital callipers. A Mann-Whitney test was u... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2899290 Tue, 13 Oct 2009 23:00:00 +0100 2899290 http://www.medworm.com/index.php?rid=2891281&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19822530%26dopt%3DAbstract Authors: Maclaine JK, Rabie AB, Wong R, Blechman A The aim of this study was to evaluate the effects of orthodontic treatment on systemic levels of the inflammatory markers, C-reactive protein (CRP), tumour necrosis factor-alpha (TNF-alpha), and interleukin-6 (IL-6). The study group comprised 11 girls and 6 boys (mean age 13.1 years) treated with fixed appliances and distalizing headgear. Venous blood samples were taken from the cubital vein of each subject before treatment (T0) and then at three further time points during treatment (T1-T3), 2 months apart. The sera from these blood samples were analysed using enzyme-linked immunosorbent assay (ELISA) assay technology for CRP, TNF-alpha, and IL-6 concentration levels. Data were compared between baseline and subsequent sequential time p... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2891281 Sat, 10 Oct 2009 23:00:00 +0100 2891281 http://www.medworm.com/index.php?rid=2880061&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19815657%26dopt%3DAbstract Authors: Manzanera D, Montiel-Company JM, Almerich-Silla JM, Gandía JL The aim of this study was to estimate the diagnostic agreement between assessments of orthodontic treatment need of a child population using the Dental Aesthetic Index (DAI) and the Index of Orthodontic Treatment Need (IOTN). A cross-sectional study of a representative random sample of children aged 12 (n = 475) and 15-16 (n = 398) years was carried out in the Valencia region of Spain. A Student's t-test was used to compare the DAI means by gender and age and a chi-square test to compare the proportions of the population in need of orthodontic treatment. To calculate the agreement between the two indices, intra-class correlation coefficient and Kappa statistics were employed. Of the 12-year-olds, 23.5 per cent ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2880061 Wed, 07 Oct 2009 23:00:00 +0100 2880061 http://www.medworm.com/index.php?rid=2872905&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19805394%26dopt%3DAbstract Authors: Sifakakis I, Pandis N, Makou M, Eliades T, Bourauel C The aim of this study was to comparatively evaluate the intrusive forces and buccolingual torquing moments generated during anterior maxillary intrusion using different maxillary incisor intrusion mechanics. Five wire specimens were used for each of the following intrusive arches: blue Elgiloy utility arch 0.016 x 0.016 inch, TMA utility arch 0.017 x 0.025 inch, Burstone TMA intrusion arch 0.017 x 0.025 inch, and reverse curve of Spee NiTi 0.016 x 0.022 inch. The wires were inserted on bracketed dental arches constructed on maxillary Frasaco models, segmented mesially to the maxillary canines. Simulated intrusion from 0.0 to 3 mm was performed using the orthodontic measurement and simulation system (OMSS), and forces and mo... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2872905 Sat, 03 Oct 2009 23:00:00 +0100 2872905 http://www.medworm.com/index.php?rid=2856406&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19797410%26dopt%3DAbstract Authors: Ramoglu SI, Sari Z The purpose of this study was to investigate the effects of rapid maxillary expansion (RME) and semi-rapid maxillary expansion (SRME) in the mixed dentition period. The SRME group consisted of 18 patients (11 girls and 7 boys) with a mean age of 8.63 +/- 1.09 years and the RME group 17 patients (11 girls and 6 boys) with a mean age of 8.78 +/- 1.21 years. A splint type tooth- and tissue-borne modified bonded RME appliance was used, with the patients activating the screw two-quarter turns per day for the first week, followed by one-quarter turn every other day in the SRME group and two-quarter turns per day throughout treatment in the RME group. The average treatment time was 57.16 +/- 21.52 and 21.23 +/- 8.36 days for the SRME and RME groups, respectively. A... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2856406 Wed, 30 Sep 2009 23:00:00 +0100 2856406 http://www.medworm.com/index.php?rid=2856405&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19797411%26dopt%3DAbstract Authors: Shawesh M, Bhatti B, Usmani T, Mandall N The aim of this trial was to compare two different orthodontic retention regimens: is night-only wear of upper and lower Hawley retainers for 1 year as effective as 6 months full-time followed by 6 months night-only wear? Sixty-seven consecutive patients attending for orthodontic debond were randomly allocated to wear upper and lower Hawley retainers either for 1 year night-only (group 1) or for 6 months full-time followed by 6 months night-only (group 2). In group 1, 41.2 per cent were males and 58.8 per cent were females and their mean age was 15.6 years [standard deviation (SD) 1.6 years]. In group 2, 24.2 per cent were males and 75.8 per cent were females and their mean age was 15.8 years (SD 1.2 years). Study models were taken at t... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2856405 Wed, 30 Sep 2009 23:00:00 +0100 2856405 http://www.medworm.com/index.php?rid=2856404&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19797412%26dopt%3DAbstract Authors: Cordasco G, Farronato G, Festa F, Nucera R, Parazzoli E, Grossi GB The aim of this in vitro study was to evaluate the frictional forces between bracket and archwire that included three passive self-ligating brackets (Damon SL2 SDS). The brackets were individually bonded to a brass mount using a preformed 0.021 x 0.025 inch stainless steel wire jig in order to exclude adverse tipping or torsion. The central bracket was positioned 1 mm higher than the others, in order that the three brackets were vertically unaligned. Thirty-six similar set-ups including in total 108 brackets were investigated using the same wire: copper (nickel-titanium) 0.014 inches. A testing machine was designed and constructed to measure the frictional forces between the wire and the three-bracket set-up. T... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2856404 Wed, 30 Sep 2009 23:00:00 +0100 2856404 http://www.medworm.com/index.php?rid=2856403&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19797413%26dopt%3DAbstract This study was conducted to evaluate the shear bond strength (SBS) of various ceramic bracket base designs bonded to glazed aluminous (Vitadur Alpha) and fluorapatite (IPS e.max Ceram) ceramics, to examine the mode of failure, and to determine the debonding characteristics of the brackets and the ceramic surfaces after bond failure. Forty ceramic discs (15 mm in diameter and 1.5 mm thick) of each ceramic were prepared and divided into four equal groups. Ten pieces of each group of different bracket bases (beads, Inspire Ice; large round pits, Crystalline IV; and irregular base, Clarity) and one group of stainless steel brackets (Optimesh XRT, control) were bonded to glazed ceramics under a 200 g load. All specimens were then subjected to SBS evaluation using a universal testing machine at ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2856403 Wed, 30 Sep 2009 23:00:00 +0100 2856403 http://www.medworm.com/index.php?rid=2856407&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19793779%26dopt%3DAbstract Authors: Baysal A, Uysal T The aims of this study were to evaluate the shear bond strength (SBS), fracture mode, and wire pull out (WPO) resistance between resin-modified glass ionomer cement (RMGIC) and conventional orthodontic composite used as a lingual retainer adhesive. Forty lower human incisors were randomly divided into two equal groups. To determine the SBS, either Transbond-LR or Fuji Ortho-LC was applied to the lingual surface of the teeth by packing the material into cylindrical plastic matrices with an internal diameter of 2.34 mm and a height of 3 mm (Ultradent) to simulate the lingual retainer bonding area. To test WPO resistance, 20 samples were prepared for each composite where the wire was embedded in the composite material and cured, 20 seconds for Transbond-LR and 4... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2856407 Tue, 29 Sep 2009 23:00:00 +0100 2856407 http://www.medworm.com/index.php?rid=2808036&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19755611%26dopt%3DAbstract The objective of the study was to compare the acceptability of occlusion among orthodontically treated and untreated adolescents in eight Finnish municipal health centres applying different timing of treatment. A random sample of 16- and 18-year olds (n = 2325) living in these municipalities was invited for a clinical examination, and 1109 adolescents participated. Two calibrated orthodontists blindly examined the participants for the acceptability of occlusion with the Occlusal Morphology and Function Index. The history of orthodontic treatment was elicited by questionnaire. The impact of the history and timing of treatment on the acceptability of occlusion was analysed with logistic regression analysis. The history of orthodontic treatment decreased the odds for acceptability of morpholo... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2808036 Mon, 14 Sep 2009 23:00:00 +0100 2808036 http://www.medworm.com/index.php?rid=2801040&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19752016%26dopt%3DAbstract Authors: Yagci A, Uysal T, Ulker M, Ramoglu SI The aim of this in vitro study was to compare microleakage of orthodontic brackets between enamel-composite and composite-bracket interfaces at the occlusal and gingival margins, bonded using indirect bonding systems with that of a conventional direct bonding method. Forty freshly extracted human maxillary premolar teeth were randomly divided into two groups. In group 1, the brackets were bonded to teeth directly according to the manufacturer's recommendations. Group 2 consisted of 20 teeth bonded indirectly with Transbond XT (3M-Unitek), as the adhesive, and Sondhi Rapid Set A/B Primer (3M-Unitek), a filled resin primer. After bonding, the specimens were further sealed with nail varnish, stained with 0.5 per cent basic fuchsine for 24 hou... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2801040 Sat, 12 Sep 2009 23:00:00 +0100 2801040 http://www.medworm.com/index.php?rid=2801039&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19752017%26dopt%3DAbstract Authors: Intachai I, Krisanaprakornkit S, Kongtawelert P, Ong-Chai S, Buranastidporn B, Suzuki EY, Jotikasthira D The aim of this study was to monitor changes in chondroitin sulphate (CS; WF6 epitope) levels in peri-miniscrew implant crevicular fluid (PMICF) during orthodontic loading. Ten patients (seven males and three females; aged 22.0 +/- 3.4 years), who required orthodontic treatment with extraction of all four premolar teeth, participated in the study. Twenty miniscrew implants (used as orthodontic anchorage) were placed, two in each patient, buccally and bilaterally in the alveolar bone between the roots of the maxillary posterior teeth. Sentalloy closed-coil springs (50 g) were used to load the miniscrew implants and to move the maxillary canines distally. During the unloaded ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2801039 Sat, 12 Sep 2009 23:00:00 +0100 2801039 http://www.medworm.com/index.php?rid=2801038&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19752018%26dopt%3DAbstract Authors: Baccetti T, Franchi L, Mucedero M, Cozza P The purpose of this cephalometric study was to analyse the treatment and post-treatment craniofacial effects of a facemask (FM) combined with a bite block (BB) with specific regard to the sagittal pharyngeal dimensions in subjects with a Class III malocclusion when compared with an untreated Class III control group. The FM/BB group (22 subjects, 12 females and 10 males) had a mean age pre-treatment (T1) of 8.9 +/- 1.5 years, at the end of active treatment (T2) of 10.5 +/- 1.3 years, and post-treatment (T3) of 12.6 +/- 1.9 years. The treated group was compared with a control group of 14 subjects (6 females and 8 males) with untreated Class III malocclusions that matched the FM/BB group as to age at T1, T2, and T3, observation periods a... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2801038 Sat, 12 Sep 2009 23:00:00 +0100 2801038 http://www.medworm.com/index.php?rid=2801037&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19752019%26dopt%3DAbstract Authors: Meyer-Marcotty P, Reuther T, Stellzig-Eisenhauer A Several investigations have analysed the frequency of sella turcica anomalies in patients with severe craniofacial deviations. Until now, there have been no studies concerning the prevalence of sella turcica bridging in homogenous groups of patients. Therefore, the aims of this controlled study were to analyse the prevalence of sella turcica bridging and measure the size of the sella turcica in two well-defined groups of Caucasian individuals. In a multicentre retrospective study, 400 pre-treatment lateral cephalograms of adult patients (over 17 years of age) with a skeletal Class III (n = 250, 132 females and 118 males) or a skeletal Class I (n = 150, 94 females and 56 males) malocclusion were analysed. The morphology, length... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2801037 Sat, 12 Sep 2009 23:00:00 +0100 2801037 http://www.medworm.com/index.php?rid=2801042&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19748923%26dopt%3DAbstract Authors: Halpern RM, Rouleau T The purpose of this study was to determine the method of preparation of enamel which best retains a bonded orthodontic bracket against a shear force. Two hundred and twelve human lower premolars were randomly divided into four equal groups. Group 1 underwent no air abrasion, group 2 received treatment with 25 mum aluminium oxide particles, group 3 with 50 mum particles, and group 4 with 100 mum particles. All groups were treated with a self-etching primer before bonding of an orthodontic bracket. Each tooth was tested in a JJ Lloyd M30K((R)) machine to determine the maximum shear force required to dislodge the bracket from the tooth. A one-way analysis of variance test conducted at a 95 per cent confidence level (CL) demonstrated that there was a signific... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2801042 Thu, 10 Sep 2009 23:00:00 +0100 2801042 http://www.medworm.com/index.php?rid=2801041&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19748924%26dopt%3DAbstract Authors: Hamamci N, Arslan SG, Sahin S The goal of this study was to assess longitudinal changes in the facial soft tissue profile in relation to age and gender in young Anatolian Turkish subjects. A total of 30 subjects (15 females and 15 males) with an Angle Class I occlusal relationship and normal antero-posterior (ANB, 2-4 degrees) skeletal relationships were selected from the archive of Dicle University. All subjects were of Anatolian Turkish heritage, and none had any apparent facial disharmony or had undergone orthodontic therapy. Lateral cephalometric radiographs taken at T1 (mean age 8.8 years), T2 (mean age 13.8 years), and T3 (mean age 17.8 years) were separately investigated. Non-gender-specific research was also carried out at the same time periods. In total, 24 measuremen... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2801041 Thu, 10 Sep 2009 23:00:00 +0100 2801041 http://www.medworm.com/index.php?rid=2789511&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19745002%26dopt%3DAbstract Authors: Bartolo A, Camilleri A, Camilleri S The aims of this study were to investigate the association of unerupted incisors with other dental anomalies and to indicate the aetiological and clinical relevance of such associations. Forty-one patients with unerupted incisors were examined. The group comprised 30 males and 11 females, ranging in age from 7 to 39 years. The patients were assessed for nine dental anomalies: hyperdontia, hypodontia, microdontia, enamel hypoplasia, infraocclusion of the primary molars and ectopia of the canines, premolars, first permanent molars, and second permanent molars. The patients were matched with respect to age and gender to 41 consecutively selected control subjects with similar selection criteria but no history of problems with incisor eruption. T... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2789511 Wed, 09 Sep 2009 23:00:00 +0100 2789511 http://www.medworm.com/index.php?rid=2782991&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19740977%26dopt%3DAbstract Authors: Kiliç N, Oktay H, Ersöz M The aim of the present study was to investigate the effects of two different force levels on the amount of total and daily tooth movement in rabbits and to determine whether any increase in tooth movement is equal to the increase in force. Forces of approximately 20 (group I) and 60 (group II) g (19.6 and 58.8 cN) were applied to the upper central incisors of 25 young adult (14 weeks of age) New Zealand female rabbits. The distance between the incisors was measured daily from the mid-levels of the crowns using a digital calliper for 20 days. Analysis of variance and Bonferroni multiple range test were used for statistical analyses. The distance between the teeth in group II was significantly greater than that in group I during the first 3 da... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2782991 Tue, 08 Sep 2009 23:00:00 +0100 2782991 http://www.medworm.com/index.php?rid=2782992&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19737779%26dopt%3DAbstract Authors: Op de Coul F, Oosterkamp BC, Jansma J, Bierman MW, Pruim GJ, Sandham A Adult patients with a Class II skeletal base are often treated by a combined orthodontic and surgical approach. Advancement of the mandible, most often including a bilateral sagittal split osteotomy (BSSO), is preceded by orthodontic alignment and frequently the curve of Spee is levelled. When the chin is prominent, there is a risk of accentuating this as a result of surgery. An option to prevent this is to maintain a deep curve of Spee before surgical advancement. This will result in an opening rotation of the mandible during surgery and thus, a less prominent chin. The aim of this study was to compare, retrospectively, two orthodontic treatment approaches in patients treated by a BSSO. In one group (4 mal... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2782992 Sun, 06 Sep 2009 23:00:00 +0100 2782992 http://www.medworm.com/index.php?rid=2776385&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19736219%26dopt%3DAbstract Authors: Sanjideh PA, Rossouw PE, Campbell PM, Opperman LA, Buschang PH The aim of this split-mouth experimental study was to determine (1) whether corticotomy procedures increase tooth movement and (2) the effects of a second corticotomy procedure after 4 weeks on the rate of tooth movement. The mandibular third and maxillary second premolars of five skeletally mature male foxhounds, approximately 2 years of age, were extracted. One randomly selected mandibular quadrant had buccal and lingual flaps and corticotomies performed around the second premolar; the other quadrant served as the control. Both maxillary quadrants had initial buccal flaps and corticotomies; one randomly selected quadrant had a second buccal flap surgery and corticotomy after 28 days. Coil springs (200 g force), a... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2776385 Sun, 06 Sep 2009 23:00:00 +0100 2776385 http://www.medworm.com/index.php?rid=2776386&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19734371%26dopt%3DAbstract Authors: Kurt G, Bayram M, Uysal T, Ozer M The aims of this study were to evaluate condylar, ramal, and condylar plus ramal mandibular vertical asymmetry in a group of cleft lip and palate (CLP) patients and compared with subjects with a 'normal' occlusion. Mandibular asymmetry index (condylar, ramal, and condylar plus ramal) and gonial angle measurements were examined on panoramic radiographs. The study groups comprised 20 unilateral cleft lip and palate (UCLP) patients (10 males and 10 females; mean age 13.03 +/- 3.33 years), 20 bilateral cleft lip and palate (BCLP) patients (10 males and 10 females; mean age 13.73 +/- 3.53 years), and a control group of 20 subjects (9 males and 11 females; mean age 14.35 +/- 2.46 years) with a normal occlusion. Kruskal-Wallis one-way analysis of var... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2776386 Thu, 03 Sep 2009 23:00:00 +0100 2776386 http://www.medworm.com/index.php?rid=2769027&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19729399%26dopt%3DAbstract Authors: Oktay H, Ulukaya E The aims of this study were to identify possible gender-related differences in tooth size ratios, to determine whether there is a prevalence for intermaxillary tooth size discrepancies in any malocclusion group, and to detect the percentage of tooth size discrepancies outside 1 or 2 standard deviations (SDs) from Bolton's mean. The material comprised the models of 500 subjects (284 females and 216 male aged between 12 and 28 years). Five groups were formed: normal occlusion, Class I, Class II division 1, Class II division 2, and Class III, which had an equal number of subjects. Tooth size measurements were undertaken using an electronic measuring device. Overall, anterior, and posterior ratios were computed as described by Bolton. For statistical evaluation,... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2769027 Wed, 02 Sep 2009 23:00:00 +0100 2769027 http://www.medworm.com/index.php?rid=2769030&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19726489%26dopt%3DAbstract Authors: Rusanen J, Lahti S, Tolvanen M, Pirttiniemi P The aim of this study was to determine the occurrence of oral health impacts among patients with severe malocclusions and dentofacial deformities before treatment. A further aim was to evaluate the effect of gender or the type of malocclusion on the oral impacts. The study comprised 151 adult patients who were referred for orthodontic or surgical-orthodontic treatment to the Oral and Maxillofacial Department, Oulu University Hospital, Finland during the years 2001-2004. The study group consisted of 92 females and 59 males with a mean age of 35.5 years [standard deviation (SD) 11.5 years, range 16-64 years]. A self-completed Oral Health Impact Profile (OHIP)-14 questionnaire was used to measure oral impacts during a 1 month referenc... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2769030 Tue, 01 Sep 2009 23:00:00 +0100 2769030 http://www.medworm.com/index.php?rid=2769029&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19726490%26dopt%3DAbstract Authors: Cerveira GP, Berthold TB, Souto AA, Spohr AM, Marchioro EM The purpose of this study was to assess the influence of two light units, a quartz-tungsten-halogen (QTH) and a light-emitting diode (LED), on the hardness and degree of conversion of an orthodontic composite resin. Sixty specimen disks were prepared from Transbond XT composite resin (3M Unitek) and light cured for 10, 20, and 30 seconds with a QTH (Curing Light XL 3000, 3M Unitek) or a LED (Ortholux, 3M Unitek) light-curing unit for 5, 10, and 15 seconds. Composite resin polymerization was evaluated by Fourier-transform infrared (FTIR) spectrophotometry and Knoop hardness number (KHN). The results were statistically analysed using analysis of variance and Tukey's multiple comparisons test (alpha = 0.05). The highest K... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2769029 Tue, 01 Sep 2009 23:00:00 +0100 2769029 http://www.medworm.com/index.php?rid=2769028&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19726491%26dopt%3DAbstract Authors: Dinçer M, Isik Aslan B The aim of this prospective study was to evaluate the number of contacts in centric occlusion during retention with thermoplastic retainers (Essix retainers) and in the long term. After four premolar extractions and active orthodontic treatment of 15 Class I (10 females, 5 males; mean age 17.20 +/- 1.7 years), thermoplastic retainers were used. Occlusal contacts were determined from occlusal registrations taken in centric occlusion at the beginning (T0), end (9 months of retention; T1), and after 2.5 years (T2). The occlusal contacts determined in these patients were compared with the values of 15 'normal' Class I subjects (9 females, 6 males; mean age 17.10 +/- 1.60 years) who had not undergone orthodontic treatment. Wilcoxon and a Mann-Whitney U-t... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2769028 Tue, 01 Sep 2009 23:00:00 +0100 2769028 http://www.medworm.com/index.php?rid=2738307&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19706641%26dopt%3DAbstract Authors: Perillo L, Masucci C, Ferro F, Apicella D, Baccetti T The present survey was performed to determine orthodontic treatment need in a large sample (n = 703) of 12-year-old schoolchildren from the southern part of Italy. The sample comprised 331 males (47 per cent) and 372 females (53 per cent), all orthodontically untreated. Two examiners, who had been previously trained in the use of occlusal indices, screened all the schoolchildren. The prevalence rates for the Dental Health Component (DHC) of the Index of Orthodontic Treatment Need (IOTN) as well as for occlusal features (Angle Class, overjet, overbite, crowding, posterior crossbite) were calculated for the total sample. The IOTN grades were statistically compared in the two genders using the chi-square test. The findings ind... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2738307 Mon, 24 Aug 2009 23:00:00 +0100 2738307 http://www.medworm.com/index.php?rid=2715815&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19687148%26dopt%3DAbstract Authors: Wellens H The aim of this study was to investigate a method which minimizes the effects of geometric distortion on various cephalometric measurements used to determine sagittal discrepancy, such as ANB angle, Wits appraisal, AB plane angle, projections on the palatal plane, Frankfort horizontal (FH) plane, the mandibulomaxillary bisector, and the SN line, in an attempt to optimize the correlation between them. This was accomplished by superimposing the Bolton 12-year male-female averaged template on a patient's tracing using Procrustes analysis and performing measurements while exchanging the patient's reference landmarks/planes (point N, the mandibulomaxillary bisector, FH plane, occlusal plane, palatal plane, and SN line) with those of the template. The normalized measuremen... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2715815 Sun, 16 Aug 2009 23:00:00 +0100 2715815 http://www.medworm.com/index.php?rid=2715814&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19687149%26dopt%3DAbstract Authors: Demling A, Demling C, Schwestka-Polly R, Stiesch M, Heuer W Insertion of fixed orthodontic appliances can induce an increase in oral biofilm and thereby cause inflammation of the periodontal tissues. The purpose of this study was to perform a longitudinal analysis of clinical and microbial parameters after insertion of lingual brackets. Bleeding on probing (BOP), plaque index (PI), and pocket probing depth (PPD) were measured in 10 adults (8 females and 2 males, aged 29.0 +/- 4.7 years) who received treatment with custom-made lingual appliances (Incognito/iBraces) before (T(0)) and 3 months after beginning of treatment (T(1)). No supportive dental prophylaxis was undertaken. In addition, a 16S rRNA-based polymerase chain reaction (PCR) method was used to detect Aggregatibacter... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2715814 Sun, 16 Aug 2009 23:00:00 +0100 2715814 http://www.medworm.com/index.php?rid=2715817&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19684124%26dopt%3DAbstract Authors: McNamara C, Drage KJ, Sandy JR, Ireland AJ The aim of this research was to determine the choices made by clinicians with respect to archwires and arch form during the initial and latter stages of orthodontic treatment with fixed appliances. A questionnaire-based study was carried out at Bristol Dental Hospital between November 2005 and March 2006. Questionnaires were distributed within the dental hospital and at local meetings in order to obtain a mixed sample of hospital and practice-based orthodontists. The clinicians asked to complete the questionnaire were consultant orthodontists (n = 37), specialist practitioners (n = 36), senior specialist registrars in orthodontics (n = 10), and dentists with a special interest in orthodontics (n = 17). The questionnaire consisted of t... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2715817 Thu, 13 Aug 2009 23:00:00 +0100 2715817 http://www.medworm.com/index.php?rid=2715816&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19684125%26dopt%3DAbstract This study was carried out to record maximum occlusal bite force (MBF) in Jordanian students with three different facial types: short, average, and long, and to determine the effect of gender, type of functional occlusion, and the presence of premature contacts and parafunctional habits on MBF. Sixty dental students (30 males and 30 females) were divided into three equal groups based on the maxillomandibular planes angle (Max/Mand) and degree of anterior overlap: included short-faced students with a deep anterior overbite (Max/Mand </= 22 degrees), normal-faced students with a normal overbite that served as the controls (Max/Mand = 27 +/- 5 degrees), and long-faced students with an anterior open bite (Max/Mand >/= 32 degrees). Their age ranged between 20 and 23 years. MBF was measure... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2715816 Thu, 13 Aug 2009 23:00:00 +0100 2715816 http://www.medworm.com/index.php?rid=2704090&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19679646%26dopt%3DAbstract Authors: Anwar N, Fida M The purpose of this study was to quantitatively evaluate skeletal and dental compensation in patients with vertical skeletal dysplasias and to determine which dentoalveolar parameters compensate for vertical jaw discrepancies. Cephalometric analyses were performed on pre-treatment lateral cephalographs of 186 orthodontic patients (120 females and 66 males; mean age 15 years 11 months) who met the selection criteria. SN-MP angle was used to classify the facial patterns as: hyperdivergent > 36 degrees, normo = 28-36 degrees, and hypo < 28 degrees. Analysis of variance (ANOVA) was used to determine statistical differences between the means in the three vertical facial types. To evaluate dental compensation quantitatively, correlation analyses were performed ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2704090 Wed, 12 Aug 2009 23:00:00 +0100 2704090 http://www.medworm.com/index.php?rid=2678969&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19656804%26dopt%3DAbstract Authors: Grünheid T, Langenbach GE, Korfage JA, Zentner A, van Eijden TM Jaw muscles are versatile entities that are able to adapt their anatomical characteristics, such as size, cross-sectional area, and fibre properties, to altered functional demands. The dynamic nature of muscle fibres allows them to change their phenotype to optimize the required contractile function while minimizing energy use. Changes in these anatomical parameters are associated with changes in neuromuscular activity as the pattern of muscle activation by the central nervous system plays an important role in the modulation of muscle properties. This review summarizes the adaptive response of jaw muscles to various stimuli or perturbations in the orofacial system and addresses general changes in muscles as t... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2678969 Tue, 04 Aug 2009 23:00:00 +0100 2678969 http://www.medworm.com/index.php?rid=2671488&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19648440%26dopt%3DAbstract Authors: Enomoto A, Watahiki J, Yamaguchi T, Irie T, Tachikawa T, Maki K It is well known that mastication has a significant influence on mandibular growth and development, but the mechanism behind this effect has not yet been clarified. Furthermore, no studies have examined the effects of changes in mastication on the three-dimensional (3D) morphometry of the mandible. The aim of the present study was to investigate the influences of changes in mastication on mandibular growth and morphology. Twenty-five 3-week-old (at the time of weaning) imprinting control region mice were randomly divided into three groups: mice fed a hard diet (HD), mice fed a soft diet (SD), and mice alternately fed hard and soft diets (HSDs) every week for 4 weeks. The morphometry of the mandible was analysed us... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2671488 Thu, 30 Jul 2009 23:00:00 +0100 2671488 http://www.medworm.com/index.php?rid=2654678&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19635743%26dopt%3DAbstract This article summarizes the essentials of studies on the craniofacial skeleton performed over 17 years. It presents data from research into foetal pathology resulting in new views on craniofacial patterning and/or fields for further discussion. The fields described cover all areas seen on profile, frontal, and panoramic radiographs. The fields are the theca, frontonasal, maxillary, palatine, and mandibular together with the cerebellar field and cervical spine. Regional fields in the dentition are described according to the pattern of peripheral nerve innervation. Studies on severely malformed foetuses show that the malformation can occur solely within a single field or in several fields. This is the background for these personal views on craniofacial patterning. These new views may assist ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2654678 Sun, 26 Jul 2009 23:00:00 +0100 2654678 http://www.medworm.com/index.php?rid=2654677&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19635744%26dopt%3DAbstract This study aimed to further analyse this regulatory process experimentally in the rat. The right upper first molars of 25 twelve-week-old male Wistar anaesthetized rats were loaded with forces in order to be moved mesially. Constant forces for 4 hours of 0.25 and 0.5 N were applied in five animals each. Furthermore, constant forces for 2 hours of 0.1 N were applied in 10 animals and afterwards, the first and second molars were permanently separated with composite. In these animals, the antagonists were sliced and five rats were killed after 1 day and five after 2 days. As a last experiment, intermittent forces of 0.1 N and 0.25 Hz were applied in five different animals for 4 hours. The untreated contralateral sides served as the control. Paraffin-embedded sections were analysed by immunohi... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2654677 Sun, 26 Jul 2009 23:00:00 +0100 2654677 http://www.medworm.com/index.php?rid=2630899&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19622629%26dopt%3DAbstract Authors: Torisu T, Yamada K, Fukui T, Yamaki M, Nakamura J, Saito I Although there have been some reports on the relationship between craniofacial morphology and the activity of the temporal muscle attached to the coronoid process, such relationship is still unclear. The aim of the present study was therefore to investigate the relationship between the coronoid process and overall craniofacial morphology using lateral cephalograms of 60 female subjects (mean age 9.6 years) without mandibular deviation. Statistical testing was undertaken using stepwise regression analysis. Anterior coronoid marginal depth correlated negatively (r = 0.71) with gonial angle, SNA, and overjet. The coronoid angle also correlated negatively (r = 0.86) with both the vertical and horizontal lengths from sella ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2630899 Mon, 20 Jul 2009 23:00:00 +0100 2630899 http://www.medworm.com/index.php?rid=2530609&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19549679%26dopt%3DAbstract Authors: Murata S The aim of this investigation was to assess average Class III craniofacial growth in Japanese males and females, using cross-sectional data from infancy to adulthood. Growth was analysed using the centroid method. Centroid G was geometrically calculated from the triangle Deltaabc, which comprised the palatal, articulare-gnathion (Ar-Gn), and A-B planes. Lateral cephalograms were obtained of 323 Japanese males and 611 females aged 2 years or older but under 25 years of age. Each dataset was divided into 2 year intervals according to age and categorized into 10 developmental stages. One-way analysis of variance followed by a Bonferroni's t-test was used to compare the results for each group of males and females separately. No significant gender differences were observed... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530609 Mon, 22 Jun 2009 23:00:00 +0100 2530609 http://www.medworm.com/index.php?rid=2530610&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19541798%26dopt%3DAbstract This study evaluated 80 healthy subjects divided into four groups: 20 girls (mean age 10.6 years), 20 boys (mean age 10.8 years), 20 females (average age 25.6 years), and 20 males (average age 27.0 years). A video was used to record each individual executing three facial expressions: a rest pose, a lip pucker, and a posed smile. Representative video frames were chosen for each individual's expressions; they were digitized and then analysed with software that extracted a set of horizontal and vertical distances of the face. All distances measured in the posed smile and lip pucker were expressed as a percentage change from the rest pose. Statistical analysis with a two-way multivariate analysis of variance (MANOVA) was performed, with gender and age as the independent variables. It was evide... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530610 Wed, 17 Jun 2009 23:00:00 +0100 2530610 http://www.medworm.com/index.php?rid=2530611&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19535605%26dopt%3DAbstract Authors: Varela M, Arrieta P, Ventureira C The simultaneous occurrence of hypodontia and supernumerary teeth in the same individual is termed 'concomitant hypo-hyperodontia' (CHH). There appears to be a correlation between CHH and some syndromes, but this anomaly is very rare in the general population. The aim of this study was to investigate the frequency of CHH in a large sample of non-syndromic orthodontic patients. The records of 2108 consecutive non-syndromic orthodontic patients aged from 7 to 16 years were examined retrospectively. Every patient had at least one panoramic radiograph. When the diagnosis of hypodontia and/or hyperodontia was made in a child under 10 years of age, a second panoramic film was taken 2-4 years later. Statistical analysis of the data was undertaken usi... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530611 Tue, 16 Jun 2009 23:00:00 +0100 2530611 http://www.medworm.com/index.php?rid=2530614&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19525440%26dopt%3DAbstract Authors: Koletsis DD, Halazonetis DJ The purpose of this study was to propose a growth-based structural superimposition method for assessment of cervical vertebral fusion and evaluate variations and abnormalities of the upper cervical vertebrae. Standardized lateral cephalograms of 156 patients (69 males and 87 females, age range 6-20 years), representing a skeletally heterogeneous orthodontic population, were used. Primary criterion for sample selection was the existence of at least two lateral cephalograms, one taken before orthodontic treatment, which depicted the first four cervical vertebrae. The abnormalities of the vertebrae were estimated by visual assessment and structural superimposition. Lateral cephalometric analysis was conducted in order to correlate vertebral anomalies t... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530614 Thu, 11 Jun 2009 23:00:00 +0100 2530614 http://www.medworm.com/index.php?rid=2530613&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19525441%26dopt%3DAbstract Authors: Hahn W, Fialka-Fricke J, Dathe H, Fricke-Zech S, Zapf A, Gruber R, Kubein-Meesenburg D, Sadat-Khonsari R The force properties of thermoformed appliances have not been systematically investigated. Therefore, the aim of the present study was to quantify the forces delivered by thermoplastic appliances manufactured from three different materials, with the same thickness, on a central upper incisor, during tipping. Five identical appliances were manufactured from three different materials all with a thickness of 1.0 mm (Ideal Clear(R), Erkodur(R), and Biolon(R)). For measuring the forces, an isolated measuring tooth, as part of a standardized resin model incorporated in a newly developed measuring device, was tipped in nine arc minute ( degree) steps, from 0 to degrees in the vest... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530613 Thu, 11 Jun 2009 23:00:00 +0100 2530613 http://www.medworm.com/index.php?rid=2530612&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19525442%26dopt%3DAbstract Authors: Ramanathan C, Hofman Z The aim of the study was to compare the extent of maxillary incisor root resorption during different orthodontic tooth movements using three different techniques, namely the basal intrusion arch, the three component arch, and levelling of the upper dental arch with the straightwire appliance. The radiographs of 49 subjects (20 males and 29 females) with a mean age of 14.5 years were taken at two time points: in groups 1 and 2 after the levelling phase and in group 3 immediately after placement of the archwire (T1) and in all groups after a period of 6 months (T2). The amount of root resorption of the central incisors was determined at T2. The average incisor resorption was different in the three groups, with group 2 (three component arch) showing greater... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530612 Thu, 11 Jun 2009 23:00:00 +0100 2530612 http://www.medworm.com/index.php?rid=2530616&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19509344%26dopt%3DAbstract Authors: Kaya B, Arman A, Uçkan S, Yazici AC This prospective study aimed to evaluate the effects of the zygoma anchorage system (ZAS) in buccal segment distalization in comparison with cervical headgear (CH). Thirty patients with Class II dental malocclusions were included in the study and were divided into two equal groups: the first group (10 females and 5 males, mean age 14.74 years at T1) received buccal segment distalization with ZAS and the second group (8 females and 7 males, mean age 15.26 years at T1) with CH. The skeletal, dental, and soft tissue changes were measured on cephalograms obtained before (T1) and after (T2) distalization, and these changes were statistically evaluated using a repeated measures analysis of variance, Mann-Whitney U-test, and Wilcoxon test. The... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530616 Mon, 08 Jun 2009 23:00:00 +0100 2530616 http://www.medworm.com/index.php?rid=2530615&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19509345%26dopt%3DAbstract Authors: Uysal T, Ustdal A, Kurt G The aim of this in vitro study was to evaluate the shear bond strength (SBS) of different metallic and ceramic bracket bonding combinations using self-etching primers (SEPs). Eighty freshly extracted human premolar teeth were randomly divided into four equal groups for bonding with ceramic or metallic brackets as follows: group 1, metallic brackets bonded with conventional acid etching; group 2, metallic brackets bonded with Transbond Plus Self-Etching primer (TPSEP); group 3, ceramic brackets bonded as per group 1; group 4, ceramic brackets bonded as per group 2. The SBS of these brackets was measured and recorded in megapascals (MPa). The adhesive remnant index (ARI) scores were determined after bracket failure. Data were analyzed with the analysis ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530615 Mon, 08 Jun 2009 23:00:00 +0100 2530615 http://www.medworm.com/index.php?rid=2530617&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19502570%26dopt%3DAbstract Authors: Tanoue N, Nagano K, Yanamoto S, Mizuno A Mandibular advancement splints (MASs) are used to advance the mandible forward in patients with sleep-disordered breathing. The conventional rigid MAS restricts the movement of the mandible, and this immobility sometimes produces discomfort, including temporomandibular disorders. A simple method for fabricating a mobile MAS was devised, using a connector made from a polyethylene toothed belt, with the intention of making the MAS more comfortable. The experimental connector is easily constructed, inexpensive, and small enough for use as an intraoral MAS. To evaluate durability, the axial and diagonal tensile breaking strengths of the MAS, using high- or low-density polyethylene (HDPE or LDPE) lateral toothed belts, were compared with tho... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530617 Thu, 04 Jun 2009 23:00:00 +0100 2530617 http://www.medworm.com/index.php?rid=2530649&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19349417%26dopt%3DAbstract Authors: Polat-Ozsoy O, Gokcelik A, Toygar Memikoglu TU The aim of this study was to evaluate the accuracy of cephalometric measurements using computerized tracing of direct digital radiographs in comparison with hand tracing of digital radiographic printouts. Comparisons were made between methods in terms of accuracy of individual measurements as well as evaluation of treatment outcomes. Pre- (T1) and post- (T2) treatment cephalometric digital radiographs of 30 patients were traced using the Vistadent OC 1.1 computer software program (group 1) and manually (group 2) by the same investigator. A total of 26 anatomical landmarks were located and measured. Measurement reproducibility was evaluated by calculating intraclass correlation coefficients, and paired t-tests were used to compare ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530649 Sun, 31 May 2009 23:00:00 +0100 2530649 http://www.medworm.com/index.php?rid=2530639&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19395372%26dopt%3DAbstract The objective of this study was to compare, on study models and initial cephalograms, the efficiency of Class II malocclusion treatment with the pendulum appliance, and with two maxillary premolar extraction protocol. The sample consisted of 48 treated Class II malocclusion patients: group 1 comprised 22 patients (7 males, 15 females) treated with the pendulum appliance, with an initial mean age of 14.44 years and group 2, 26 patients (14 males, 12 females) treated with two maxillary premolar extractions at an initial mean age of 13.66 years. To compare the efficiency of each treatment protocol, the occlusal outcomes were evaluated on dental casts using the Peer Assessment Rating (PAR) Index and the treatment time (TT) of each group was calculated on clinical charts. The degree of treatmen... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530639 Sun, 31 May 2009 23:00:00 +0100 2530639 http://www.medworm.com/index.php?rid=2530637&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19401355%26dopt%3DAbstract The objective of this study was to survey retention procedures used in orthodontic practices in the Netherlands. A questionnaire was sent to all 279 orthodontists working in the Netherlands. The questionnaire consisted of six parts, mainly containing multiple-choice questions. Information as to background data on the individual orthodontist, retention in general, frequency of different types of removable or bonded retainers that were used, retention protocol, and the type and size of the wire used for bonded retainers was assessed. All statistical analyses were performed using Statistical Package for Social Sciences version 12.0.1. Tests for the relationship between two items were based on the chi-square test. The overall response rate was 91 per cent. Most orthodontists placed a bonded re... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530637 Sun, 31 May 2009 23:00:00 +0100 2530637 http://www.medworm.com/index.php?rid=2530632&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19458288%26dopt%3DAbstract Authors: Milne TJ, Ichim I, Patel B, McNaughton A, Meikle MC Increases in bone strains above a certain threshold have a positive effect on bone mass, whereas reductions in strain magnitude lead to bone loss and osteopenia; the term 'mechanostat' has been introduced to describe this tissue-level negative feedback mechanism. The mechanobiology of bone and particularly alveolar bone is poorly understood, and whether the mechanostat theory has any relevance to explaining the osseous changes that occur during orthodontic tooth movement remains unclear. To investigate the relationship further, an expansile force of 0.2 N was applied to the maxillary molars of 36, 6-week-old Wistar rats by helical coil springs. The animals were sacrificed at 1, 2, 4, and 8 days and the tissue response analyze... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530632 Sun, 31 May 2009 23:00:00 +0100 2530632 http://www.medworm.com/index.php?rid=2530619&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19487435%26dopt%3DAbstract Authors: Suárez C, Vilar T Bracket placement is an important phase of orthodontic treatment. Final compensatory archwire bends or bracket repositioning may be avoided if brackets are accurately positioned at the outset, so as to correctly express their built-in prescription. The purpose of this study was to investigate the levelling of marginal ridges when a bracket placement protocol, with fixed values from the incisal edges and occlusal surfaces, was used on digitized models. A computerized tool, OrthoCAD(R), was used to predict the end result using virtual set-up software. The appliances used for digital simulation were 3M MBT Victory Series 0.022 inch with a 0.019 x 0.025 inch stainless steel final archwire on 42 digitized models. A paired t-test was used to investigate differ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530619 Sun, 31 May 2009 23:00:00 +0100 2530619 http://www.medworm.com/index.php?rid=2530618&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19487436%26dopt%3DAbstract Authors: Ulker M, Uysal T, Ramoglu SI, Ucar FI The aim of this study was to test the null hypothesis that there is no significant difference in bond strength and failure site location of composite bonded to etched and unetched enamel with an antibacterial monomer-containing adhesive and a conventional lingual retainer adhesive system. The crowns of 60 extracted lower human incisors were mounted in acrylic resin leaving the lingual surface of the crowns parallel to the base of the moulds. The teeth were randomly divided into three equal groups: two experimental and a control. Conventional lingual retainer composite (Transbond LR) and antibacterial monomer-containing adhesive (Clearfil Protect Bond), with or without prior etching, were applied to the lingual surface of the teeth by packi... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530618 Sun, 31 May 2009 23:00:00 +0100 2530618 http://www.medworm.com/index.php?rid=2530620&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19482876%26dopt%3DAbstract Authors: Uysal T, Yagci A, Basciftci FA, Sisman Y The aims of this study were (1) to establish standards for Arnett soft tissue cephalometric analysis of Anatolian Turkish young adults and (2) to identify possible gender differences between males and females. After analysing the cephalometric radiographs of 350 individuals, 133 subjects (67 males, mean age 22.6 +/- 2.2 years, and 66 females, mean age 22.1 +/- 2.6 years) with normal antero-posterior and vertical skeletal relationships were selected. The true vertical line was established. The landmarks were marked and soft tissue facial analysis was performed. For statistical evaluation, an independent-samples t-test was used. The lower lip thickness of the Turkish population was lower and menton thickness was greater than Arnett's norm... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530620 Thu, 28 May 2009 23:00:00 +0100 2530620 http://www.medworm.com/index.php?rid=2530624&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19477970%26dopt%3DAbstract Authors: Borzabadi-Farahani A, Borzabadi-Farahani A, Eslamipour F The aim of this cross-sectional study was to determine the prevalence of malocclusions, occlusal traits, and their gender distribution in urban Iranian school children. Five hundred and two subjects (253 females and 249 males, aged 11-14 years) were examined. Molar relationship, overjet (OJ), overbite, midline deviation, crossbite, and crowding/spacing were recorded. Gender dimorphism was evaluated by the chi-square test. According to the classification of Angle, the prevalence of Class I, Class II division 1, Class II division 2, and Class III malocclusions was 41.8, 24.1, 3.4, and 7.8 per cent, respectively. Symmetric molar relationship was present in 69.5 per cent. An OJ of at least 3.5 mm or more was present in 28.1 ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530624 Wed, 27 May 2009 23:00:00 +0100 2530624 http://www.medworm.com/index.php?rid=2530623&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19477971%26dopt%3DAbstract Authors: Lerstøl M, Torget O, Vandevska-Radunovic V The aim of this study was to analyze the long-term stability of combined activator-headgear treatment on skeletal and dental structures in Class II patients. The material comprised 26 subjects, 10 girls and 16 boys. All had a molar Class II relationship, overjet >/=6 mm, and overbite >/=5 mm. They were treated in one practice with combined activator and headgear appliances. Lateral cephalometric radiographs and dental study casts were taken before treatment (T0, mean age 11.9 years), at the end of activator-headgear treatment (T1, mean age 15.9 years), and 12-15 years out of retention (T2, mean age 28.6 years). Nineteen cephalometric and nine dental cast variables were evaluated using a paired sample t-test between T0-T1, T... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530623 Wed, 27 May 2009 23:00:00 +0100 2530623 http://www.medworm.com/index.php?rid=2530622&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19477972%26dopt%3DAbstract Authors: Kirveskari P, Jämsä T The purpose of the present study was to test the effect of elimination of occlusal interferences on the incidence of requests for treatment of symptoms in the head and cervicobrachial region. One hundred and twelve females 45 years of age or under, were randomly divided into a treatment group (n = 54) and a control group (n = 58). The former underwent occlusal adjustment and the latter grinding that did not affect occlusal contacts. The treatments were repeated every 12 months over a period of 4 years. The outcome variable was a spontaneous request for treatment. Statistical analyses included chi-square tests for categorical variables and a t- or Wilcoxon ranked sum test for continuous variables. Poisson regression was used to compare the risk o... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530622 Wed, 27 May 2009 23:00:00 +0100 2530622 http://www.medworm.com/index.php?rid=2530621&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19477973%26dopt%3DAbstract Authors: Al-Bitar ZB, Al-Omari IK, Al-Ahmad HT, El Maaytah MA, Cunningham SJ The aim of this study was to assess health-related quality of life (HRQoL) in adult Jordanian patients referred for orthognathic treatment, and to compare this with previously published data from a British cohort. Thirty-eight Jordanians (21 females and 17 males; aged 16-31 years) who were about to commence a course of orthognathic treatment completed a generic HRQoL questionnaire [Short-Form 36 (SF-36)] and a condition-specific orthognathic quality-of-life questionnaire (OQoLQ). The questionnaires were completed prior to commencing any pre-surgical orthodontic treatment. The data were compared using the Mann-Whitney U-test for independent groups with non-normally distributed data. There were no statistically ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530621 Wed, 27 May 2009 23:00:00 +0100 2530621 http://www.medworm.com/index.php?rid=2530628&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19474227%26dopt%3DAbstract Authors: Primozic J, Ovsenik M, Richmond S, Kau CH, Zhurov A A crossbite (CB) occurs in approximately 4-23 per cent of young children and may lead to mandibular and facial asymmetry. Therefore, early intervention is often necessary to create conditions for normal occlusal and facial development. The aim of this study was to assess facial asymmetry and palatal volume (pre- and post-treatment) in two groups of children, one with a unilateral CB and the other with no crossbite (NCB). Thirty children with CB (13 males, 17 females, mean age 4.9 +/- 0.98 years) and 28 children with NCB (17 males, 11 females, mean age 5.3 +/- 0.36 years) were included in the study. Those with a CB were treated with an intra-oral expansion appliance. The faces and dental casts of the children were scanned usin... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530628 Tue, 26 May 2009 23:00:00 +0100 2530628 http://www.medworm.com/index.php?rid=2530627&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19474228%26dopt%3DAbstract The objective of this study was to measure discolouration using a digital camera on various types of clear orthodontic elastic modules, immersion solutions, and time periods to determine whether the cause of discolouration of these modules was due to simple staining, chemical degradation, or both. Three types of clear orthodontic elastomeric modules were investigated [Plastic ligatures (AO); Power 'O's 012 (OC); dispense-A-tie (TP)]. The elastomeric modules were immersed in the stretched condition in distilled water (control group) and in 75 per cent ethanol for chemical degradation and 2 per cent methylene blue for simple staining. After 0, 1, 2, 3, 6, 9, 12, 15, 18, and 21 hours and 1, 2, 3, 4, and 5 days of immersion, digital images of the modules were taken and processed using commerci... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530627 Tue, 26 May 2009 23:00:00 +0100 2530627 http://www.medworm.com/index.php?rid=2530626&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19474229%26dopt%3DAbstract The objective of this study was to investigate the effect of bracket type (conventional and self-ligating) on the levels of Streptococcus mutans and total bacterial counts in whole saliva of orthodontic patients. Thirty-two male and female patients were selected using the following inclusion criteria: adolescents (mean age 13.6 years, range 11-17 years), fixed appliances in both arches, non-smoker, and no reported oral habits. Demographic and oral hygiene characteristics were determined for each subject. The patients were subdivided into two groups with random allocation of bracket type (conventional or self-ligating). An initial saliva sample was obtained before the initiation of treatment (T1) and a second sample 2-3 months following appliance bonding (T2). Salivary S. mutans and total b... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530626 Tue, 26 May 2009 23:00:00 +0100 2530626 http://www.medworm.com/index.php?rid=2530625&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19474230%26dopt%3DAbstract Authors: Rózsa N, Nagy K, Vajó Z, Gábris K, Soós A, Alberth M, Tarján I Non-syndromic permanent canine agenesis, or combined with agenesis, or developmental absence of other tooth types, has occasionally been described in the literature, but isolated forms are rarely observed. The purpose of the present retrospective radiographic study was to provide data on the prevalence and distribution of permanent canine agenesis in the Hungarian population. Dental panoramic tomograms and the medical history data of 4417, 6- to 18-year-old children (average age 12 years, male-to-female ratio 1:1), who presented for treatment at the Department of Paediatric Dentistry and Orthodontics of the Semmelweis University Budapest, Hungary, were examined. Patients with systemic disea... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530625 Tue, 26 May 2009 23:00:00 +0100 2530625 http://www.medworm.com/index.php?rid=2530630&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19465737%26dopt%3DAbstract The objective was to examine these processes related to time and root development. Seventy-six premolars were divided into subgroups: 33 teeth were intruded and then extracted (G1); 25 teeth were intruded and then left in situ for varying periods before extraction (G2); 18 teeth served as the controls (G3). All teeth were examined by light microscopy. Using non-parametric statistical analysis, differences between the groups were examined with the Pearson chi-square test. Teeth in G1 and G2 had significantly more resorptive lesions, 55 and 64 per cent, respectively, than the controls of 11 per cent. Resorption was observed over the whole root surface and increased with time. The occurrence increased to 100 per cent in both experimental groups after 36 days of intrusion. The appearance of le... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530630 Thu, 21 May 2009 23:00:00 +0100 2530630 http://www.medworm.com/index.php?rid=2530629&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19465738%26dopt%3DAbstract This study investigated the prevalence and type of pain experienced during orthodontic treatment in 30 subjects (12 males, 18 females, aged 12-18 years) with crowding. Fifteen patients were treated with conventional brackets (Victory Series) and 15 with self-ligating brackets (Damon SL II). The first archwire for all patients was a 0.014 inch nickel-titanium (NiTi) archwire with a force of approximately 100 g. Conventional brackets were ligated with elastomeric modules. A visual analogue scale (VAS) was used daily to assess the intensity of pain; the use of pain medication was also reported in a specially designed daybook for a total period of 3 months. Pearson's chi-square was used to investigate the difference between groups in the frequency of pain experience, its nature, and the use of... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530629 Thu, 21 May 2009 23:00:00 +0100 2530629 http://www.medworm.com/index.php?rid=2530631&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19460855%26dopt%3DAbstract Authors: Trakyali G, Ozdemir FI, Arun T The purpose of this study was to evaluate enamel colour alteration of five different orthodontic bonding adhesives by means of digital measurements after exposure to photoageing in order to simulate discolouration of adhesives in vivo. Seventy-five non-carious premolars were randomly divided into five equal groups. The brackets were bonded with five different adhesives (Transbond XT, Eagle Bond, Light Bond, Blugloo, Unite) and subjected to artificial accelerated photoageing for 24 hours. The enamel surfaces were colourimetrically evaluated before bonding, following debonding and cleaning with a tungsten carbide bur, after polishing with Stainbuster, and after photoageing of the debonded enamel surface. The Commission Internationale de l'Eclairage... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530631 Wed, 20 May 2009 23:00:00 +0100 2530631 http://www.medworm.com/index.php?rid=2530634&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19447839%26dopt%3DAbstract This study demonstrates the functional enmeshment between two different third order assessments and the most common incisor features on lateral radiographs. Both methods of third order evaluation show sufficient reliability and are appropriate for routine orthodontic practice. PMID: 19447839 [PubMed - as supplied by publisher] (Source: European Journal of Orthodontics) European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530634 Thu, 14 May 2009 23:00:00 +0100 2530634 http://www.medworm.com/index.php?rid=2530633&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19447840%26dopt%3DAbstract Authors: Sasaki Y, Satoh K, Hayasaki H, Fukumoto S, Fujiwara T, Nonaka K P561T heterozygous missense mutation in the growth hormone receptor (GHR) is a candidate genetic polymorphism (single-nucleotide polymorphism) for human mandibular growth. The purpose of this study was to assess whether this mutation affects mandibular growth during early childhood. The difference in mandibular growth between P561T heterozygous and wild-type individuals was analysed by cephalometric measurements during childhood. The subjects included 33 children with mandibular protrusion (aged 3-12 years, 16 males and 17 females) and 27 normal children (aged 3-13 years, 14 males and 13 females). Genomic DNA extracted from buccal epithelial cells was genotyped for the P561T heterozygous mutation with a molecular ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530633 Thu, 14 May 2009 23:00:00 +0100 2530633 http://www.medworm.com/index.php?rid=2530635&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19443692%26dopt%3DAbstract Authors: Uysal T, Baysal A, Yagci A The aims of this study were to evaluate intra-examiner repeatability and inter-examiner reproducibility of landmarks using two cephalometric analysing techniques, manual and computerized, and to compare these for speed. One hundred lateral cephalometric radiographs were randomly selected and 11 angular and six linear parameters were traced and measured by two examiners using the manual method and Dolphin Image Software 9.0 on each radiograph. A Student's t-test for paired and independent samples was used to compare the mean values of intra- and inter-examiner differences. Intraclass correlation coefficients (ICC) were calculated to determine intra- and inter-examiner correlation (r value). Both operators were generally consistent in the repeated meas... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530635 Wed, 13 May 2009 23:00:00 +0100 2530635 http://www.medworm.com/index.php?rid=2530638&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19401354%26dopt%3DAbstract Authors: Anic-Milosevic S, Varga S, Mestrovic S, Lapter-Varga M, Slaj M The aim of the present study was to determine the dental and occlusal features that could contribute to the aetiology of palatally displaced canines (PDCs). The material consisted of pre-treatment dental casts of 50 patients (36 females and 14 males) with unilateral and bilateral PDCs aged 14-16 years (mean 15.6 +/- 1.6 years). These were compared with a control group of 50 treated subjects (25 males and 25 females) of the same age with normally erupted maxillary canines. The following parameters were measured on the dental casts: the mesiodistal (MD) and buccolingual (BL) width of each maxillary tooth, the maxillary interpremolar and intermolar widths, overjet and overbite, dentoalveolar arch relationship (based o... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530638 Mon, 27 Apr 2009 23:00:00 +0100 2530638 http://www.medworm.com/index.php?rid=2530636&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19401356%26dopt%3DAbstract Authors: Uysal T, Yagci A, Uysal B, Akdogan G The aim of this study was to test nano-composite (Filtek Supreme Plus Universal) and a newly introduced nano-ionomer (Ketac N100 Light Curing Nano-Ionomer) restorative to determine their shear bond strength (SBS) and failure site locations in comparison with a conventional light-cure orthodontic bonding adhesive (Transbond XT). Sixty freshly extracted human maxillary premolar teeth were arbitrarily divided into three equal groups. The brackets were bonded to the teeth in each group with different composites, according to the manufacturers' instructions. The SBS values of the brackets were recorded in Megapascals (MPa) using a universal testing machine. Adhesive remnant index scores were determined after failure of the brackets. The data wer... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530636 Mon, 27 Apr 2009 23:00:00 +0100 2530636 http://www.medworm.com/index.php?rid=2530645&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19395369%26dopt%3DAbstract Authors: Verma D, Peltomäki T, Jäger A The aim of this study was to investigate the validity of hand-wrist radiographic analysis in estimating the amount of remaining craniofacial growth. The material compromised cephalograms of 22 males and 27 females with a Class I malocclusion. The median age of the females at the beginning (T1) was 11 years 10 months and of the males 12 years 6 months and at the end (T2) of treatment 14 years 7 months and 15 years 3 months, respectively. Statural height was measured and a lateral cephalogram was obtained for every patient at T1 and T2. A hand-wrist radiograph was taken only at T1. The cephalograms were scanned and analyzed. Relative dimensional growth changes in statural height as well as of the length of the cranial base (N-S), the maxil... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530645 Wed, 22 Apr 2009 23:00:00 +0100 2530645 http://www.medworm.com/index.php?rid=2530643&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19395370%26dopt%3DAbstract Authors: Strahm C, De Sousa AP, Grobéty D, Mavropoulos A, Kiliaridis S Some Class II malocclusions are due, at least in part, to a retruded lower dental arch relative to the mandibular body. The purpose of this study was to determine if a direct anterior force on the lower incisors could lead to bodily movement of these teeth. Twenty-seven patients (9 males, 18 females; mean age: 9.8 years) were treated with a reverse headgear (RHG) in the lower dental arch combined with labial root torque of the lower incisors. An activator was added to disclude the arches. This group was compared with 26 patients (10 males, 16 females; mean age: 9.7 years) treated with an activator combined with conventional posterior extraoral traction on the upper molars. All patients had a second stage of tre... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530643 Wed, 22 Apr 2009 23:00:00 +0100 2530643 http://www.medworm.com/index.php?rid=2530641&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19395371%26dopt%3DAbstract This study was undertaken to compare laypersons' and professionals' perception of soft tissue profiles of Class III adults, and to evaluate which cephalometric variables are likely to influence the profile assessment score (PAS). Lateral headfilms and coloured profile photographs of 18 skeletal Class III Caucasian adult patients (10 males, 8 females with a mean age of 24.5 years) prior to surgery, and nine adult Caucasian patients (four males, five females with a mean age of 27.4 years) with a dental Class I occlusion and no major skeletal discrepancy were included in the study. The headfilms were hand traced and digitized. Various cephalometric variables were calculated by computer software. Each printed profile photograph was evaluated aesthetically by 18 laypersons and 18 orthodontists ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530641 Wed, 22 Apr 2009 23:00:00 +0100 2530641 http://www.medworm.com/index.php?rid=2530647&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19349418%26dopt%3DAbstract The objectives of this study were to comparatively assess the magnitude and direction of forces and moments generated from different bracket systems, during the initial levelling and alignment stage of orthodontic treatment. Three types of brackets were used: Orthos2 (Ormco), Damon2 (Ormco), and In-Ovation R (GAC). The brackets were bonded on resin replicas models of a patient's crowded mandibular arch, and a 0.014 inch Damon archform CuNiTi (Ormco) wire was inserted. The model was mounted on the Orthodontic Measurement and Simulation System (OMSS) and six static measurements were taken at the initial crowded state per bracket for the lateral incisor, canine, and first premolar. A total of 10 repetitions were performed for each measurement, with new brackets and archwires used for each tri... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2530647 Sun, 05 Apr 2009 23:00:00 +0100 2530647 http://www.medworm.com/index.php?rid=2305875&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19342424%26dopt%3DAbstract Authors: Gameiro GH, Nouer DF, Cenci MS, Cury JA A modified in situ model to assess enamel demineralization around orthodontic devices was developed and a pilot study was conducted to evaluate two types of archwire ligation. Enamel blocks were placed in palatal removable appliances where orthodontic brackets were bonded. The brackets on one side of the appliance were ligated with elastomeric rings and those on the other side with stainless steel wires. Four volunteers (two males, two females), mean age 27 years, wore the appliances for 14 days during which time a 20 per cent sucrose solution was dripped eight times a day onto the enamel blocks. The biofilm formed around the brackets was collected for microbiological analyses and the mineral loss around the brackets was determined by cr... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2305875 Thu, 02 Apr 2009 04:00:00 +0100 2305875 http://www.medworm.com/index.php?rid=2305872&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19342425%26dopt%3DAbstract Authors: Naoumova J, Lindman R The aim of this study was to compare the accuracy of cephalometric measurements made with digital tracing software (FACAD(R)) with equivalent hand-traced measurements, and to evaluate the reproducibility of each method. Pre- and post-surgical lateral cephalographs of 30 adult patients (12 males and 18 females, median age = 25 years, standard deviation = 8.7) who had undergone orthognathic treatment were scanned into a computer. One operator identified 25 landmarks digitally on the computer display and manually on acetate paper. Measurements on the 60 radiographs were duplicated, and measurement error of each method was determined with interclass correlation. A paired t-test was used to detect differences between the manual and digital methods. Overall, gr... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2305872 Thu, 02 Apr 2009 04:00:00 +0100 2305872 http://www.medworm.com/index.php?rid=2305881&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19339673%26dopt%3DAbstract Authors: Strujic M, Anic-Milosevic S, Mestrovic S, Slaj M An appropriate relationship of the mesiodistal (MD) widths of the maxillary and mandibular teeth favours optimal post-treatment results. The aims of this study were to determine whether there is a difference in the incidence of tooth size discrepancies among different skeletal malocclusion groups and if gender dimorphism exists. The dental casts and lateral cephalometric radiographs of 301 Croatian subjects (127 males and 174 females, mean age 16.86 +/- 2.93 years) were selected from a larger sample of records of the archives of the Orthodontic Department, School of Dental Medicine, University of Zagreb, Croatia. The subjects were from malocclusion groups according to Angle classification, with the corresponding skeletal charact... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2305881 Wed, 01 Apr 2009 04:00:00 +0100 2305881 http://www.medworm.com/index.php?rid=2305878&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19339674%26dopt%3DAbstract Authors: Trakyali G, Malkondu O, Kazazoglu E, Arun T The aim of this study was to determine the optimum silane-coupling agent and the optimum concentration of acid agent when bonding to porcelain surfaces. Eighty deglazed feldspathic porcelain discs with a diameter of 10 mm and a thickness of 2 mm mounted in acrylic resin blocks were randomly divided into four groups. In groups 1 and 2, the porcelain surfaces were etched with 9.6 per cent hydrofluoric (HF) acid and in groups 3 and 4 with 5 per cent HF acid. In groups 1 and 3, the Dynalock maxillary central incisor brackets were bonded with Pulpdent silane and Unite bonding adhesive and in groups 2 and 4 with Reliance silane and Unite. Shear forces were applied to the samples using an Instron universal test machine. The non-parametric K... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2305878 Wed, 01 Apr 2009 04:00:00 +0100 2305878 http://www.medworm.com/index.php?rid=2287420&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19304760%26dopt%3DAbstract Authors: Thilander B The aim of the present study was to examine dentoalveolar development in subjects with an 'ideal' (normal) occlusion. The material comprised 436 study casts of 189 male and 247 female subjects of Swedish origin between the ages of 5 and 31 years with no history of orthodontic treatment. Tooth width, and arch length, width, and depth, as well as palatal height were measured. The data were analysed with a Student's t-test. The results verified that continuous changes of the dental arches occur from the primary until the adult period, with individual variations. This change could be interpreted as a biological migration of the dentition, resulting in anterior crowding especially in the mandible, even in subjects with congenitally missing third molars. The occlusion sh... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2287420 Wed, 25 Mar 2009 06:56:01 +0100 2287420 http://www.medworm.com/index.php?rid=2287416&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19304761%26dopt%3DAbstract Authors: Demling A, Heuer W, Elter C, Heidenblut T, Bach FW, Schwestka-Polly R, Stiesch-Scholz M Insertion of fixed orthodontic appliances induces increased biofilm formation caused by a higher number of plaque-retentive sites. The purpose of the study was to perform a quantitative analysis of supra- and subgingival long-term biofilm formation on orthodontic bands. Ten patients (five females and five males, aged 18.3+/-5.4 years) who had received therapy with fixed orthodontic appliances for 24+/-9 months were enrolled in the study. Biofilm formation on 28 orthodontic bands was analyzed quantitatively with the Rutherford backscattering detection method, a scanning electron microscopy technique. The biofilm formation for the supra- and subgingival surfaces was calculated from the grey v... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2287416 Wed, 25 Mar 2009 06:55:26 +0100 2287416 http://www.medworm.com/index.php?rid=2287425&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19299245%26dopt%3DAbstract Authors: Bildt MM, Bloemen M, Kuijpers-Jagtman AM, Von den Hoff JW Orthodontic tooth movement requires extensive re-modelling of the periodontium. Matrix metalloproteinases (MMPs) degrade the extracellular matrix during re-modelling, while their activity is regulated by the tissue inhibitors of metalloproteinases (TIMPs). The aim of this study was to investigate differences in MMP and TIMP levels in the gingival crevicular fluid (GCF) at the resorption and apposition sides of orthodontically moved teeth, and to compare these with control teeth. GCF samples were collected from eight orthodontic patients wearing fixed appliances with superelastic nickel-titanium coil springs. The samples were analysed by gelatin zymography, which allows detection of both active and latent MMPs, and rever... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2287425 Wed, 18 Mar 2009 04:00:00 +0100 2287425 http://www.medworm.com/index.php?rid=2276545&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19289538%26dopt%3DAbstract Authors: Ambrosio AR, Trevilatto PC, Sakima T, Ignácio SA, Shimizu RH In order to evaluate the relationship between the morphology of the upper lip and muscle activity in a sample of 38 subjects (17 males and 21 females) with Angle Class II division 1 malocclusions, cephalometric and electromyographic analyses were conducted. The sample was subdivided into either predominantly nose or mouth breathers. The individuals were evaluated at two different periods, with a 2 year interval. At the first observation, the subjects were 11 years to 14 years 11 months of age and at the second observation, 13 years 4 months to 16 years 6 months of age. Height and thickness of the upper lip were measured on lateral cephalograms with the aid of a digital pachymeter. For each individual, electromyo... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2276545 Mon, 16 Mar 2009 04:00:00 +0100 2276545 http://www.medworm.com/index.php?rid=2276544&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19289539%26dopt%3DAbstract Authors: Polat-Ozsoy O, Arman-Ozcirpici A, Veziroglu F The aim of this study was to investigate if true incisor intrusion can be achieved using miniscrews. Eleven patients (three males and eight females; mean age: 19.8 +/- 4.8 years) with normal vertical dimension showing a pre-treatment deep bite of 5.9 +/- 0.9 mm and a 'gummy' smile were enrolled in the study. After levelling of the maxillary central and lateral incisors with a segmental arch, an intrusive force of 80 g using closed coil springs was applied from two miniscrews placed between the roots of the lateral and canine teeth. The amount of incisor intrusion was evaluated on lateral cephalometric headfilms taken at the end of levelling (T1) and at the end of intrusion (T2). Statistical analysis of the data was performed using ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2276544 Mon, 16 Mar 2009 04:00:00 +0100 2276544 http://www.medworm.com/index.php?rid=2276543&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19289540%26dopt%3DAbstract Authors: Barlow ST, Moore MB, Sherriff M, Ireland AJ, Sandy JR The aim of this study was to assess the severity of any underlying malocclusion in subjects presenting for treatment of a palatally impacted canine (PIC) using a modification of the Dental Health Component (DHC) of the Index of Treatment Need (MIOTN), which does not factor in the impacted canine. The pre-treatment study models of 54 subjects who had previously undergone surgical exposure of a PIC, followed by fixed appliance orthodontic alignment, were scored independently by two examiners on two occasions using the MIOTN system. Unweighted kappa statistics revealed good intraoperator agreement for the two examiners and a moderate level of interexaminer agreement. Forty-six and 41 per cent of the sample still scored either ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2276543 Mon, 16 Mar 2009 04:00:00 +0100 2276543 http://www.medworm.com/index.php?rid=2263074&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19276156%26dopt%3DAbstract Authors: Pietilä I, Pietilä T, Svedström-Oristo AL, Varrela J, Alanen P The aim of this study was to compare orthodontic practices in eight Finnish municipal health centres selected on the basis of an earlier survey to represent early and late timing of treatment. The health centres were grouped according to the mean age of starting treatment; earlier versus later than 9 years of age. A random sample of 16 and 18 year olds (n = 2325) living in these municipalities were invited for a clinical examination, and 1109 adolescents participated. The participants reported on their previous or ongoing orthodontic treatment by means of a questionnaire. Data on orthodontic treatment received were collected from the dental files of the adolescents who reported a treatment history an... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2263074 Tue, 10 Mar 2009 04:00:00 +0100 2263074 http://www.medworm.com/index.php?rid=2224358&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19244457%26dopt%3DAbstract Authors: Lux CJ, Dücker B, Pritsch M, Komposch G, Niekusch U The aim of this study was to provide detailed information concerning clinically relevant occlusal traits and the prevalence of occlusal anomalies in an orthodontically relevant period of dental development. Four hundred and ninety-four German schoolchildren (237 males and 257 females), median age 9 years, were orthodontically examined. Overjet and overbite were measured to the nearest 0.5 mm, and sagittal molar relationships were registered clinically to the nearest quarter unit. In addition, crossbites, scissor bites, and midline displacements were evaluated. Descriptive statistics was complemented by testing gender differences and differences between groups with Class I and Class II anomalies (Mann-Whitney U-test) as w... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2224358 Wed, 25 Feb 2009 05:00:00 +0100 2224358 http://www.medworm.com/index.php?rid=2218464&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19237509%26dopt%3DAbstract Authors: Celik E, Polat-Ozsoy O, Toygar Memikoglu TU The aim of this study was to evaluate the accuracy and reliability of angular and linear cephalometric measurements using a computerized method of direct digital radiographs. This was then compared with the measurements obtained with a computerized method that uses a digitizing pad and hand tracing of printout radiographs. Pre-treatment digital cephalometric radiographs of 125 patients were traced using Vistadent 2.1 AT and Jiffy Orthodontic Evaluation (JOE) software programs and by hand tracing of the printouts. Twenty-six anatomical landmarks were defined on each radiograph by a single investigator and 28 variables were calculated. Statistical analysis was undertaken using one-way analysis of variance and multiple group comparisons... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2218464 Mon, 23 Feb 2009 05:00:00 +0100 2218464 http://www.medworm.com/index.php?rid=2212605&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19233930%26dopt%3DAbstract Authors: Basaran G, Ozer T, Devecioglu Kama J The purpose of this ex vivo study was to compare the bond strengths and modes of failure of brackets bonded with three self-etching products [Adper Prompt L-Pop (3M Espe), Futurabond NR (Voco) and Transbond Plus (3M Unitek)] and a conventional 38 per cent phosphoric acid-etching system Etch-Rite (Pulpdent Corp.) at two different time points. Ninety-six defect-free premolars were randomly allocated to eight groups (n = 12). The etching procedure was carried out according to the manufacturers' instructions. The shear bond strengths (SBSs) were measured after storage in distilled water for 12 and 24 hours. The brackets were debonded using a universal testing machine with a cross-head speed of 0.5 mm/minute. Multiple comparisons of the SBSs for... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2212605 Fri, 20 Feb 2009 05:00:00 +0100 2212605 http://www.medworm.com/index.php?rid=2164555&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19193706%26dopt%3DAbstract Authors: Cildir SK, Germec D, Sandalli N, Ozdemir FI, Arun T, Twetman S, Caglar E Previous studies have suggested that probiotic supplements in dairy products may affect the oral microbial ecology, but the effect in orthodontic patients has not previously been reported. The aim of the present study was to examine whether short-term consumption of fruit yogurt containing probiotic bifidobacteria would affect the levels of salivary mutans streptococci and lactobacilli in patients with fixed orthodontic appliances. A double-blind, randomized crossover study was performed and 24 healthy adolescents (12-16 years) undergoing orthodontic treatment were followed over four periods. During periods 2 and 4 (2 weeks each), the subjects ingested 200 g fruit yogurt containing Bifidobacterium animali... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2164555 Wed, 04 Feb 2009 05:00:00 +0100 2164555 http://www.medworm.com/index.php?rid=2164554&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19193707%26dopt%3DAbstract Authors: Chan DW, Samman N, McMillan AS The association between craniofacial morphology and congenitally missing teeth is at present unclear. The aims of this study were to investigate whether hypodontia is associated with changes in the sagittal skeletal profile and to identify putative relationships between the skeletal profile and the severity of hypodontia. In a cross-sectional analytical study, the craniofacial structure and profile based on two-dimensional lateral cephalograms of Southern Chinese hypodontia patients (n = 49, 24 males, 25 females, mean age 16.4 years) and a comparison group without hypodontia (n = 41, 15 males, 26 females, mean age 16.7 years) were compared. The hypodontia patients were divided into three subgroups according to the severity of hypodontia (mild: &l... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2164554 Wed, 04 Feb 2009 05:00:00 +0100 2164554 http://www.medworm.com/index.php?rid=2164553&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19193708%26dopt%3DAbstract Authors: Eslamian L, Ghassemi A, Amini F, Jafari A, Afrand M The purpose of this in vitro study was to determine a safe and efficient method for bonding brackets to resin composite (RC), permitting the brackets to tolerate shear forces and allowing removal without causing surface damage to the aesthetic restoration. The shear bond strength (SBS) of 60 brackets bonded to silanated and non-silanated RC surfaces were compared. A Bis-GMA containing orthodontic adhesive system was used to bond stainless steel upper lateral incisor brackets to 60 composite discs, half of which had surface treatment with a silane coupling agent. SBS testing was performed with an Instron universal testing machine. After debond, the bracket base and corresponding RC discs were examined under a stereomicroscope ... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2164553 Wed, 04 Feb 2009 05:00:00 +0100 2164553 http://www.medworm.com/index.php?rid=2157864&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19188281%26dopt%3DAbstract This study was undertaken to evaluate the material degradation of clinical bracket-archwire-contacting surfaces after in vivo orthodontic use. Twenty-four stainless steel multiloop edgewise archwires with two different cross sections (0.016 x 0.016 and 0.016 x 0.022 inches) were used for at least 6 months in the mouths of 14 patients. The surfaces of both as-received (cross-section of 0.016 x 0.016, 0.016 x 0.022, and 0.017 x 0.025 inches) and the in vivo wires were examined using scanning electron microscopy. The as-received wires exhibited an inhomogeneous surface with different surface irregularities resulting from the manufacturing process. For the in vivo archwires, an increase in the variety, type, and number of surface irregularities were observed. Crevice corrosion occurred not onl... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2157864 Mon, 02 Feb 2009 05:00:00 +0100 2157864 http://www.medworm.com/index.php?rid=2130034&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19164410%26dopt%3DAbstract Authors: Pirttiniemi P, Peltomäki T, Müller L, Luder HU Deviations in the growth of the mandibular condyle can affect both the functional occlusion and the aesthetic appearance of the face. The reasons for these growth deviations are numerous and often entail complex sequences of malfunction at the cellular level. The aim of this review is to summarize recent progress in the understanding of pathological alterations occurring during childhood and adolescence that affect the temporomandibular joint (TMJ) and, hence, result in disorders of mandibular growth. Pathological conditions taken into account are subdivided into (1) congenital malformations with associated growth disorders, (2) primary growth disorders, and (3) acquired diseases or trauma with associated growth disorder... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2130034 Sat, 24 Jan 2009 16:28:37 +0100 2130034 http://www.medworm.com/index.php?rid=2130033&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19164411%26dopt%3DAbstract Authors: Luzi C, Verna C, Melsen B Although immediate loading of orthodontic mini-implants can be clinically successful, a lack of histological data exists. The present investigation was performed to evaluate, in an animal model, tissue reaction to immediate loading. Fifty orthodontic titanium mini-implants were inserted in four adult male monkeys at four time intervals. Forty-two devices were loaded with 50 cN super-elastic coil springs immediately after insertion while eight were left unloaded and served as the controls. After euthanasia, the following histomorphometric parameters were evaluated: bone volume (BV/TV), bone-to-implant contact (BIC), mineralizing surface (MS/BS), and erosion surface (ES/BS). Statistical analysis was performed by means of non-parametric tests. Four devic... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2130033 Sat, 24 Jan 2009 16:28:32 +0100 2130033 http://www.medworm.com/index.php?rid=2130032&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19164412%26dopt%3DAbstract Authors: Hu Y, Billiau AD, Verdonck A, Wouters C, Carels C Juvenile idiopathic arthritis (JIA) can severely disturb facial growth and affect occlusal development. In this case-control study, facial, functional, and occlusal characteristics of 100 JIA patients (35 males and 65 females; age range: 1.7-19.4 years) comprising all subtypes classified according to the revised classification criteria of the International League of Associations for Rheumatology (ILAR) were studied. They were compared with a mixed orthodontic control group (n = 32; 12 males and 20 females) and with a Class II division 1 malocclusion group (n = 19; eight males and 11 females). The JIA patients and controls were evaluated using clinical assessment, dental pantomograms, lateral cephalograms (LCGs), and dental cast... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2130032 Sat, 24 Jan 2009 16:28:26 +0100 2130032 http://www.medworm.com/index.php?rid=2130031&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19164413%26dopt%3DAbstract Authors: Elekdag-Turk S, Isci D, Ozkalayci N, Turk T The aim of this study was to compare the shear bond strength (SBS) and debonding characteristics of a polymer mesh base ceramic bracket bonded with two different surface conditioning methods. InVu Readi-Base ceramic brackets were bonded to 100 human premolars with different etching protocols. With conventional method (CM), the teeth were etched with 37 per cent phosphoric acid for 30 seconds, while Transbond Plus self-etching primer (SEP) was applied as recommended by the manufacturer. SBS testing was performed on 25 samples of each group while the remaining 25 samples of each group were subjected to plier or machine debonding after thermocycling for 1000 cycles. The adhesive remnant index (ARI) was used to determine the amount of co... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2130031 Sat, 24 Jan 2009 16:28:19 +0100 2130031 http://www.medworm.com/index.php?rid=2111367&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19147810%26dopt%3DAbstract This study aimed to gather statistically validated information on the changes in orthodontic variables in patients with bilateral upper lateral incisor aplasia treated with isolated orthodontic space closure. Data were collected from 25 (15 females, 10 males) consecutively treated, unselected adolescents [mean age at the end of treatment 16.4 years, standard deviation (SD) 1.3] after orthodontic space closure using push-and-pull mechanics (PPM). The changes in the relevant parameters were determined by comparing baseline and final lateral headfilms and casts. Following verification of normal distribution by means of a Kolmogorov-Smirnov test, a two-tailed t-test for related data was performed. SNA, ANB, OcP-NL, OcP-ML, upper space balance, overbite, overjet, bilateral molar relationship, a... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2111367 Thu, 15 Jan 2009 05:00:00 +0100 2111367 http://www.medworm.com/index.php?rid=2087863&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19126819%26dopt%3DAbstract Authors: Johansson AM, Follin ME The aim of the present study was to evaluate if orthodontists in Sweden agree with the grading in the Dental Health Component (DHC) of the Index of Orthodontic Treatment Need, to analyze if certain malocclusions are graded differently, and to determine if there are any background factors among Swedish orthodontists that could be related to their judgements. Two questionnaires were sent to 272 orthodontists in Sweden. In one questionnaire, they were asked to grade different malocclusions (defined in the DHC) according to the need for orthodontic treatment and in the other to provide details of their background. Eighty-one per cent (219) answered one or both questionnaires and 216 answered the questions concerning the need for orthodontic treatment. The S... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2087863 Tue, 06 Jan 2009 05:00:00 +0100 2087863 http://www.medworm.com/index.php?rid=2087862&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19126820%26dopt%3DAbstract Authors: Hamamci N, Basaran G, Uysal E The aim of this study was to investigate the relationship between Turkish university students' awareness of malocclusion, their satisfaction with their personal dental appearance, and the severity of their occlusal irregularities. The sample consisted of 841 randomly selected university students, 522 (62.1 per cent) males and 319 (37.9 per cent) females, aged 17-26 years (mean age, 21.91 +/- 1.92 years). A pre-tested questionnaire was used to assess the subjects' awareness of malocclusion and satisfaction with their personal dental appearance; the actual severity of malocclusion was determined using the Dental Aesthetic Index (DAI). Statistical analysis was carried out using chi-square for gender differences and Spearman rank-order correlation coe... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2087862 Tue, 06 Jan 2009 05:00:00 +0100 2087862 http://www.medworm.com/index.php?rid=2066220&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19106265%26dopt%3DAbstract Authors: Hassan B, van der Stelt P, Sanderink G The aims of this study were to assess the accuracy of linear measurements on three-dimensional (3D) surface-rendered images generated from cone beam computed tomography (CBCT) in comparison with two-dimensional (2D) slices and 2D lateral and postero-anterior (PA) cephalometric projections, and to investigate the influence of patient head position in the scanner on measurement accuracy. Eight dry human skulls were scanned twice using NewTom 3G CBCT in an ideal and a rotated position and the resulting datasets were used to create 3D surface-rendered images, 2D tomographic slices, and 2D lateral and PA projections. Ten linear distances were defined for cephalometric measurements. The physical and radiographic measurements were repeated twice... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2066220 Tue, 23 Dec 2008 05:00:00 +0100 2066220 http://www.medworm.com/index.php?rid=2048704&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19088058%26dopt%3DAbstract Authors: Gracco A, Cirignaco A, Cozzani M, Boccaccio A, Pappalettere C, Vitale G The aims of this study were to analyse the stress distribution developing around an orthodontic miniscrew (OM) inserted into the maxilla and to determine the stress field changes for different screw lengths and for different levels of osseointegration occurring at the bone/screw interface. An integrated experimental/numerical approach was adopted. Using the photoelastic technique, the stress field arising in the bone after screw insertion and the application of the initial orthodontic load was assessed. The finite element (FE) method was used to determine the stress acting in the bony tissue after a given time following screw application, when, for the viscoelastic relaxation effects, the only stress field... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2048704 Mon, 15 Dec 2008 05:00:00 +0100 2048704 http://www.medworm.com/index.php?rid=2048703&cid=s_37680_11_f&fid=37680&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19088059%26dopt%3DAbstract Authors: Ogura M, Kamimura H, Al-Kalaly A, Nagayama K, Taira K, Nagata J, Miyawaki S The purpose of the present study was to determine whether a force of 20 cN can be biologically active for tooth movement and to examine the pain intensity during the application of light (20 cN) or heavy (200 cN) continuous forces for 7 days. In the first experiment, a force of 20 cN was applied to eight canines in five volunteers. The mean tooth movement during 10 weeks was 2.4 mm. In the second experiment, two forces of 20 or 200 cN were applied to maxillary premolars in 12 male subjects (aged 24-31 years) to measure pain intensity for 7 days. Spontaneous and biting pain were recorded every 2-4 hours on a 100 mm visual analogue scale (VAS). Wilcoxon signed-rank test was used for statistical analysis.... European Journal of Orthodontics journals http://www.medworm.com/rss/comments.php?id=2048703 Mon, 15 Dec 2008 05:00:00 +0100 2048703