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Emotional stress and orthodontic tooth movement: effects on apical root resorption, tooth movement, and dental tissue expression of interleukin-1 alpha and calcitonin gene-related peptide immunoreactive nerve fibres in rats.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)....
Source: European Journal of Orthodontics - November 16, 2009 Category: Dentistry Authors: Vandevska-Radunovic V, Murison R Tags: Eur J Orthod Source Type: journals

Professionals' and laypersons' appreciation of various options for Class III surgical correction.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 opti...
Source: European Journal of Orthodontics - November 9, 2009 Category: Dentistry Authors: Fabré M, Mossaz C, Christou P, Kiliaridis S Tags: Eur J Orthod Source Type: journals

Comparison between tongue volume from magnetic resonance images and tongue area from profile cephalograms.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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(...
Source: European Journal of Orthodontics - November 9, 2009 Category: Dentistry Authors: Liégeois F, Albert A, Limme M Tags: Eur J Orthod Source Type: journals

A novel bracket base design: biomechanical stability.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ord...
Source: European Journal of Orthodontics - November 5, 2009 Category: Dentistry Authors: Merone G, Valletta R, De Santis R, Ambrosio L, Martina R Tags: Eur J Orthod Source Type: journals

The effect of moisture on the shear bond strength of gold alloy rods bonded to enamel with a self-adhesive and a hydrophobic resin cement.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: European Journal of Orthodontics - October 29, 2009 Category: Dentistry Authors: Dursun E, Wiechmann D, Attal JP Tags: Eur J Orthod Source Type: journals

Perception of orthodontic treatment need in children and adolescents.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 sepa...
Source: European Journal of Orthodontics - October 27, 2009 Category: Dentistry Authors: Spalj S, Slaj M, Varga S, Strujic M, Slaj M Tags: Eur J Orthod Source Type: journals

Microleakage between composite-wire and composite-enamel interfaces of flexible spiral wire retainers. Part 2: comparison of amorphous calcium phosphate-containing adhesive with conventional lingual retainer composite.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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.), ...
Source: European Journal of Orthodontics - October 25, 2009 Category: Dentistry Authors: Uysal T, Ulker M, Baysal A, Usumez S Tags: Eur J Orthod Source Type: journals

Microleakage between composite-wire and composite-enamel interfaces of flexible spiral wire retainers. Part 1: comparison of three composites.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 score...
Source: European Journal of Orthodontics - October 25, 2009 Category: Dentistry Authors: Uysal T, Baysal A, Usumez S, Ulker M Tags: Eur J Orthod Source Type: journals

Influence of bisphosphonates on orthodontic tooth movement in mice.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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-...
Source: European Journal of Orthodontics - October 18, 2009 Category: Dentistry Authors: Fujimura Y, Kitaura H, Yoshimatsu M, Eguchi T, Kohara H, Morita Y, Yoshida N Tags: Eur J Orthod Source Type: journals

Glass fibre reinforced versus multistranded bonded orthodontic retainers: a 2 year prospective multi-centre study.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 mo...
Source: European Journal of Orthodontics - October 15, 2009 Category: Dentistry Authors: Tacken MP, Cosyn J, De Wilde P, Aerts J, Govaerts E, Vannet BV Tags: Eur J Orthod Source Type: journals

Prevalence of hypodontia in orthodontic patients in Brasilia, Brazil.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 female...
Source: European Journal of Orthodontics - October 15, 2009 Category: Dentistry Authors: Gomes RR, da Fonseca JA, Paula LM, Faber J, Acevedo AC Tags: Eur J Orthod Source Type: journals

A randomized clinical trial of thermoplastic retainer wear.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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, ...
Source: European Journal of Orthodontics - October 13, 2009 Category: Dentistry Authors: Thickett E, Power S Tags: Eur J Orthod Source Type: journals

Does orthodontic tooth movement cause an elevation in systemic inflammatory markers?Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: European Journal of Orthodontics - October 10, 2009 Category: Dentistry Authors: Maclaine JK, Rabie AB, Wong R, Blechman A Tags: Eur J Orthod Source Type: journals

Diagnostic agreement in the assessment of orthodontic treatment need using the Dental Aesthetic Index and the Index of Orthodontic Treatment Need.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 c...
Source: European Journal of Orthodontics - October 7, 2009 Category: Dentistry Authors: Manzanera D, Montiel-Company JM, Almerich-Silla JM, Gandía JL Tags: Eur J Orthod Source Type: journals

A comparative assessment of the forces and moments generated with various maxillary incisor intrusion biomechanics.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: European Journal of Orthodontics - October 3, 2009 Category: Dentistry Authors: Sifakakis I, Pandis N, Makou M, Eliades T, Bourauel C Tags: Eur J Orthod Source Type: journals

Maxillary expansion in the mixed dentition: rapid or semi-rapid?Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 t...
Source: European Journal of Orthodontics - September 30, 2009 Category: Dentistry Authors: Ramoglu SI, Sari Z Tags: Eur J Orthod Source Type: journals

Hawley retainers full- or part-time? A randomized clinical trial.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: European Journal of Orthodontics - September 30, 2009 Category: Dentistry Authors: Shawesh M, Bhatti B, Usmani T, Mandall N Tags: Eur J Orthod Source Type: journals

In vitro evaluation of the frictional forces between brackets and archwire with three passive self-ligating brackets.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: European Journal of Orthodontics - September 30, 2009 Category: Dentistry Authors: Cordasco G, Farronato G, Festa F, Nucera R, Parazzoli E, Grossi GB Tags: Eur J Orthod Source Type: journals

Shear bond strength of ceramic brackets with various base designs bonded to aluminous and fluorapatite ceramics.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 bra...
Source: European Journal of Orthodontics - September 30, 2009 Category: Dentistry Authors: Kukiattrakoon B, Samruajbenjakul B Tags: Eur J Orthod Source Type: journals

Resin-modified glass ionomer cements for bonding orthodontic retainers.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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,...
Source: European Journal of Orthodontics - September 29, 2009 Category: Dentistry Authors: Baysal A, Uysal T Tags: Eur J Orthod Source Type: journals

Acceptability of adolescents' occlusion in Finnish municipal health centres with differing timing of orthodontic treatment.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 treatme...
Source: European Journal of Orthodontics - September 14, 2009 Category: Dentistry Authors: Pietilä I, Pietilä T, Svedström-Oristo AL, Varrela J, Alanen P Tags: Eur J Orthod Source Type: journals

Microleakage under orthodontic brackets bonded with the custom base indirect bonding technique.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 prim...
Source: European Journal of Orthodontics - September 12, 2009 Category: Dentistry Authors: Yagci A, Uysal T, Ulker M, Ramoglu SI Tags: Eur J Orthod Source Type: journals

Chondroitin sulphate (WF6 epitope) levels in peri-miniscrew implant crevicular fluid during orthodontic loading.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 m...
Source: European Journal of Orthodontics - September 12, 2009 Category: Dentistry Authors: Intachai I, Krisanaprakornkit S, Kongtawelert P, Ong-Chai S, Buranastidporn B, Suzuki EY, Jotikasthira D Tags: Eur J Orthod Source Type: journals

Treatment and post-treatment effects of facemask therapy on the sagittal pharyngeal dimensions in Class III subjects.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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) ...
Source: European Journal of Orthodontics - September 12, 2009 Category: Dentistry Authors: Baccetti T, Franchi L, Mucedero M, Cozza P Tags: Eur J Orthod Source Type: journals

Bridging of the sella turcica in skeletal Class III subjects.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 male...
Source: European Journal of Orthodontics - September 12, 2009 Category: Dentistry Authors: Meyer-Marcotty P, Reuther T, Stellzig-Eisenhauer A Tags: Eur J Orthod Source Type: journals

The effect of air abrasion preparation on the shear bond strength of an orthodontic bracket bonded to enamel.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: European Journal of Orthodontics - September 10, 2009 Category: Dentistry Authors: Halpern RM, Rouleau T Tags: Eur J Orthod Source Type: journals

Longitudinal profile changes in an Anatolian Turkish population.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: European Journal of Orthodontics - September 10, 2009 Category: Dentistry Authors: Hamamci N, Arslan SG, Sahin S Tags: Eur J Orthod Source Type: journals

Unerupted incisors--characteristic features and associated anomalies.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 4...
Source: European Journal of Orthodontics - September 9, 2009 Category: Dentistry Authors: Bartolo A, Camilleri A, Camilleri S Tags: Eur J Orthod Source Type: journals

Effects of force magnitude on tooth movement: an experimental study in rabbits.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 statisti...
Source: European Journal of Orthodontics - September 8, 2009 Category: Dentistry Authors: Kiliç N, Oktay H, Ersöz M Tags: Eur J Orthod Source Type: journals

Maintenance of a deep bite prior to surgical mandibular advancement.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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, retrospectivel...
Source: European Journal of Orthodontics - September 6, 2009 Category: Dentistry Authors: Op de Coul F, Oosterkamp BC, Jansma J, Bierman MW, Pruim GJ, Sandham A Tags: Eur J Orthod Source Type: journals

Tooth movements in foxhounds after one or two alveolar corticotomies.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 quad...
Source: European Journal of Orthodontics - September 6, 2009 Category: Dentistry Authors: Sanjideh PA, Rossouw PE, Campbell PM, Opperman LA, Buschang PH Tags: Eur J Orthod Source Type: journals

Mandibular asymmetry in cleft lip and palate patients.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 s...
Source: European Journal of Orthodontics - September 3, 2009 Category: Dentistry Authors: Kurt G, Bayram M, Uysal T, Ozer M Tags: Eur J Orthod Source Type: journals

Intermaxillary tooth size discrepancies among different malocclusion groups.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 u...
Source: European Journal of Orthodontics - September 2, 2009 Category: Dentistry Authors: Oktay H, Ulukaya E Tags: Eur J Orthod Source Type: journals

Quality of life in patients with severe malocclusion before treatment.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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-comp...
Source: European Journal of Orthodontics - September 1, 2009 Category: Dentistry Authors: Rusanen J, Lahti S, Tolvanen M, Pirttiniemi P Tags: Eur J Orthod Source Type: journals

Degree of conversion and hardness of an orthodontic resin cured with a light-emitting diode and a quartz-tungsten-halogen light.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 a...
Source: European Journal of Orthodontics - September 1, 2009 Category: Dentistry Authors: Cerveira GP, Berthold TB, Souto AA, Spohr AM, Marchioro EM Tags: Eur J Orthod Source Type: journals

Effects of thermoplastic retainers on occlusal contacts.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 subj...
Source: European Journal of Orthodontics - September 1, 2009 Category: Dentistry Authors: Dinçer M, Isik Aslan B Tags: Eur J Orthod Source Type: journals

Prevalence of orthodontic treatment need in southern Italian schoolchildren.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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....
Source: European Journal of Orthodontics - August 24, 2009 Category: Dentistry Authors: Perillo L, Masucci C, Ferro F, Apicella D, Baccetti T Tags: Eur J Orthod Source Type: journals

Improving the concordance between various anteroposterior cephalometric measurements using Procrustes analysis.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: European Journal of Orthodontics - August 16, 2009 Category: Dentistry Authors: Wellens H Tags: Eur J Orthod Source Type: journals

Influence of lingual orthodontic therapy on microbial parameters and periodontal status in adults.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: European Journal of Orthodontics - August 16, 2009 Category: Dentistry Authors: Demling A, Demling C, Schwestka-Polly R, Stiesch M, Heuer W Tags: Eur J Orthod Source Type: journals

An evaluation of clinicians' choices when selecting archwires.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: European Journal of Orthodontics - August 13, 2009 Category: Dentistry Authors: McNamara C, Drage KJ, Sandy JR, Ireland AJ Tags: Eur J Orthod Source Type: journals

Maximum occlusal bite forces in Jordanian individuals with different dentofacial vertical skeletal patterns.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: European Journal of Orthodontics - August 13, 2009 Category: Dentistry Authors: Abu Alhaija ES, Al Zo'ubi IA, Al Rousan ME, Hammad MM Tags: Eur J Orthod Source Type: journals

Compensation for vertical dysplasia and its clinical application.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 diffe...
Source: European Journal of Orthodontics - August 12, 2009 Category: Dentistry Authors: Anwar N, Fida M Tags: Eur J Orthod Source Type: journals

The adaptive response of jaw muscles to varying functional demands.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 st...
Source: European Journal of Orthodontics - August 4, 2009 Category: Dentistry Authors: Grünheid T, Langenbach GE, Korfage JA, Zentner A, van Eijden TM Tags: Eur J Orthod Source Type: journals

Effects of mastication on mandibular growth evaluated by microcomputed tomography.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 h...
Source: European Journal of Orthodontics - July 30, 2009 Category: Dentistry Authors: Enomoto A, Watahiki J, Yamaguchi T, Irie T, Tachikawa T, Maki K Tags: Eur J Orthod Source Type: journals

Orthodontics and foetal pathology: a personal view on craniofacial patterning.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 malform...
Source: European Journal of Orthodontics - July 26, 2009 Category: Dentistry Authors: Kjær I Tags: Eur J Orthod Source Type: journals

Proliferation and differentiation of periodontal ligament cells following short-term tooth movement in the rat using different regimens of loading.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: European Journal of Orthodontics - July 26, 2009 Category: Dentistry Authors: Pavlidis D, Bourauel C, Rahimi A, Götz W, Jäger A Tags: Eur J Orthod Source Type: journals

A cross-sectional study on the relationship between craniofacial morphology and the coronoid process.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: European Journal of Orthodontics - July 20, 2009 Category: Dentistry Authors: Torisu T, Yamada K, Fukui T, Yamaki M, Nakamura J, Saito I Tags: Eur J Orthod Source Type: journals

Determination of craniofacial growth in patients with untreated Class III malocclusions and anterior crossbites using the centroid method.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: European Journal of Orthodontics - June 22, 2009 Category: Dentistry Authors: Murata S Tags: Eur J Orthod Source Type: journals

Gender and age differences in facial expressions.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 t...
Source: European Journal of Orthodontics - June 17, 2009 Category: Dentistry Authors: Houstis O, Kiliaridis S Tags: Eur J Orthod Source Type: journals

Non-syndromic concomitant hypodontia and supernumerary teeth in an orthodontic population.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 chil...
Source: European Journal of Orthodontics - June 16, 2009 Category: Dentistry Authors: Varela M, Arrieta P, Ventureira C Tags: Eur J Orthod Source Type: journals