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 'Braz Dent J' source. Sat, 28 Nov 2009 14:00:14 +0100 http://www.medworm.com/index.php?rid=2843026&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784460%26dopt%3DAbstract Authors: Rodrigues LV, Vasconcelos AC, Campos PA, Brant JM Pulp samples of 50 healthy human teeth with indication for extraction were examined to evaluate the role of apoptosis in pulp elimination during physiological root resorption. Two groups were formed: a test group (n=30) composed of pulp samples of primary teeth with physiological root resorption and a control group (n=20) composed of pulp samples of permanent maxillary third molars. Morphological evidence of apoptosis as well as in situ detection of cellular DNA fragmentation by TUNEL assay and detection of internucleosomal pattern of fragmentation of the genomic DNA by electrophoresis were observed. The apoptotic index of the primary tooth group was significantly higher than that of the permanent tooth group (51.01 +/- 0.52 ve... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843026 Tue, 29 Sep 2009 22:50:03 +0100 2843026 http://www.medworm.com/index.php?rid=2843025&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784461%26dopt%3DAbstract This study evaluated the radioprotective effect of sodium selenite on the bone repair process in tibiae of female rats. For such purpose, 100 female Wistar rats (Rattus norvegicus, albinus) were randomly assigned to 4 groups (n=25), according to the treatment received: administration of distilled water (control); administration of sodium selenite; gamma radiation; and administration of sodium selenite plus gamma radiation. A bone defect was prepared on both tibiae of all animals. Three days after surgery, the gamma radiation and selenium/gamma radiation groups received 8 Gy gamma rays on the lower limbs. Five animals per group were sacrificed 7, 14, 21, 28 days after surgery for evaluation of the repair process by bone volumetric density analysis. The 5 animals remaining in each group were... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843025 Tue, 29 Sep 2009 22:50:03 +0100 2843025 http://www.medworm.com/index.php?rid=2843024&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784462%26dopt%3DAbstract Authors: Vieira Ede O, Fidel Junior RA, Figueredo CM, Fischer RG The aim of this study was to clinically evaluate the use of alloderm to increase the width of attached gingiva. Nine patients were selected. The inclusion criteria were: attached gingiva smaller than 1 mm; Miller's class I and II gingival recession; patients able to attend control dental appointments; absence of periodontal pocket and endodontic treatment in the neighboring area where the acellular dermal graft would be placed. The clinical evaluation included: allograft shrinkage 7, 14, 21, 30, 60 and 90 days after surgery; width of attached gingiva at the end of the study; difference in color and mobility of allograft. Allograft shrinkage was calculated by comparing its area immediately after surgery to its areas in the... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843024 Tue, 29 Sep 2009 22:50:03 +0100 2843024 http://www.medworm.com/index.php?rid=2843023&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784463%26dopt%3DAbstract In conclusion, chemical components released from SB in aqueous environment were highly toxic to cell culture and thus an inflammatory pulpal response should be considered during the clinical application of dental adhesives. PMID: 19784463 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843023 Tue, 29 Sep 2009 22:50:03 +0100 2843023 http://www.medworm.com/index.php?rid=2843022&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784464%26dopt%3DAbstract In conclusion, fluoride-containing solutions (pH 7.0) used as mouthwashes do not damage the surface of cast CP Ti and can be used by patients with titanium-based restorations. PMID: 19784464 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843022 Tue, 29 Sep 2009 22:50:03 +0100 2843022 http://www.medworm.com/index.php?rid=2843021&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784465%26dopt%3DAbstract Authors: Santana IL, Lodovici E, Matos JR, Medeiros IS, Miyazaki CL, Rodrigues-Filho LE The aim of this study was to verify the influence of an experimental heat treatment (170 masculineC/10 min) using a casting furnace on the mechanical properties (hardness and flexural strength) of 2 commercial direct resin composites (TPH Spectrum and Filtek P60) compared to a commercial indirect resin system (BelleGlass). Heat treatment temperature was determined after thermal characterization by thermogravimetry (TG) and differential scanning calorimetry (DSC). Data was analyzed by ANOVA and Tukey's test at 5% significance level. There was statistical significance for the main factor heat treatment (p=0.03) and composite (p=0.02), for flexural strength. For Knoop hardness, only the main factor com... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843021 Tue, 29 Sep 2009 22:50:03 +0100 2843021 http://www.medworm.com/index.php?rid=2843020&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784466%26dopt%3DAbstract In conclusion, the final irrigation protocols evaluated in this study using the Luer syringe presented similar performance in the removal of debris from the apical third of flattened root canals. PMID: 19784466 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843020 Tue, 29 Sep 2009 22:50:03 +0100 2843020 http://www.medworm.com/index.php?rid=2843019&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784467%26dopt%3DAbstract In conclusion, laser reduced the frequency and severity of OM, suggesting that therapeutic laser can be used both as a new form of prevention and treatment of OM. PMID: 19784467 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843019 Tue, 29 Sep 2009 22:50:03 +0100 2843019 http://www.medworm.com/index.php?rid=2843018&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784468%26dopt%3DAbstract Authors: Abreu MH, Lopes-Terra MC, Braz LF, Rímulo AL, Paiva SM, Pordeus IA The study compared the attitudes and behavior of 4th-year dental students regarding infection control rules in 1995 and 2005. Self-administrated questionnaires were applied to 592 students at 5 different dental schools in 1995 (n=350) and in 2005 (n=242). The chi-square and Fisher's exact tests were used for statistical analysis of data. Significance level was set at p<0.05. The response rate was 90.3% in 1995 and 81.0% in 2005. There was no improvement in the use of rubber gloves (p=0.316), face masks (p=0.572) or gowns (p=0.862) between 1995 and 2005. There was a lesser frequency of the use of protective eyewear in 2005 (p<0.001). No student used the individual protection equipment correctly. There... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843018 Tue, 29 Sep 2009 22:50:03 +0100 2843018 http://www.medworm.com/index.php?rid=2843017&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784469%26dopt%3DAbstract In this study, the craniomandibular index was applied to valuate signs and symptoms of CMD in 60 dentate patients, who were assigned to 2 groups: symptomatic (n=35) and asymptomatic (n=25). An interview on psychopathologies was carried out with the aim to detect the presence of some mood disorders, such as depression, dysthymic and bipolar I disorders. Among these disturbances, depression was the most significant aspect to be reported (p<0.05) since it was present in most symptomatic patients. This important interaction was also significantly correlated (p<0.05) with the Palpation Index. These results suggest that psychopathological aspects could increase muscle tenderness and pain in addition to sleep dysfuntions and other physical complaints. Therefore, psychopathologies should be ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843017 Tue, 29 Sep 2009 22:50:03 +0100 2843017 http://www.medworm.com/index.php?rid=2843016&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784470%26dopt%3DAbstract Authors: Motta AC, Domaneschi C, Komesu MC, Souza Cda S, Aoki V, Migliari DA The aim of this study was to evaluate the efficacy of a 0.05% clobetasol propionate ointment administered in trays to 22 patients with desquamative gingivitis in a double-blind, crossover, placebo-controlled trial. Patients received container number 1 and were instructed to apply the ointment 3 times a day for 2 weeks, and to reduce the application to once a day in the third week. Next, the patients were then instructed to discontinue the treatment for 2 weeks, and were then given container 2, used in the same way and for the same length of time as container 1. Regarding signs, 17 patients presented some improvement, while 5 experienced worsening with clobetasol propionate. With the placebo, 14 patients presen... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843016 Tue, 29 Sep 2009 22:50:03 +0100 2843016 http://www.medworm.com/index.php?rid=2843015&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784471%26dopt%3DAbstract Authors: Siéssere S, Sousa LG, Lima Nde A, Semprini M, Vasconcelos PB, Watanabe PC, Rancan SV, Regalo SC The purpose of this study was to analyze the electromyographic (EMG) activity and the maximal molar bite force in women diagnosed with osteoporosis in the maxillary and mandibular regions, considering the habits and conditions that lead to development of generalized skeletal bone loss, including on face bones, can disturb the functional harmony of the stomatognathic system. Twenty-seven women with mandibular and maxillary osteoporosis and 27 healthy controls volunteered to participate in the study. A 5-channel electromyographer was used. Muscle activity was evaluated by means of EMG recordings of the masticatory musculature (masseter and temporalis muscles, bilaterally) during ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843015 Tue, 29 Sep 2009 22:50:03 +0100 2843015 http://www.medworm.com/index.php?rid=2843014&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784472%26dopt%3DAbstract Authors: Canger EM, Celenk P, Kayipmaz S Inflammatory fibrous hyperplasia (epulis fissuratum) (IFH) and inflammatory papillary hyperplasia (IPH) are oral mucosal diseases caused by ill-fitting denture wearing. A study was carried out on a group of Turkish people consisted of 131 female and 39 male complete denture wearers (n= 170) distributed in two age groups (30-60 and 60-80 years old). The analysis of data collected from patients showed that while the incidence of IFH was higher in women than in men, the incidence of IPH was similar. Most lesions were found in the 30-60 year-old group. The incidence of lesions increased as the denture wearing period increased. Soft tissue growth was the main complaint of the patients with IFH and IPH. In the maxilla, the incidence of IFH was higher ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843014 Tue, 29 Sep 2009 22:50:03 +0100 2843014 http://www.medworm.com/index.php?rid=2843013&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784473%26dopt%3DAbstract Authors: Alemán Navas RM, Martínez Mendoza MG, Herrera H, Herrera HP Hymenoptera order includes bees, which have a stinging apparatus at the tail capable of delivering venom to the affected tissues. Myocardial infarction, acute renal failure, Necrotizing fasciitis, fatal infection and hemifacial asymmetry, are some of the unusual reactions reported following hymenoptera stings. This paper reports a case of bee sting in the right floor of the nose that mimicked an odontogenic infection affecting the upper lip, canine space and nasal cavity such as in cases of infection secondary to pulpal or periodontal pathology of the anterior teeth. After a thorough clinical and radiographic examination, odontogenic infection was discarded and the diagnosis of floor of the nose mucosal lysi... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843013 Tue, 29 Sep 2009 22:50:03 +0100 2843013 http://www.medworm.com/index.php?rid=2843012&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784474%26dopt%3DAbstract This article describes the procedure of immediate implant placement in the anterior maxilla replacing teeth with chronic periapical lesions, which were condemned due to endodontic lesions persisting after failed endodontic treatment and endodontic surgery, and discusses the relationship between the procedure and periapical lesions. Surgical removal of hopeless teeth 11, 12 and 21 was performed conservatively in such a way to preserve the anatomy and gingival esthetics. A second surgical access was gained at the apical level, allowing the debridement of the surgical chamber for elimination of the periapical lesion, visual orientation for setting of the implants and filling of the surgical chamber with xenogenous bovine bone graft. After this procedure, the bone chamber was covered with an a... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843012 Tue, 29 Sep 2009 22:50:03 +0100 2843012 http://www.medworm.com/index.php?rid=2843011&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19784475%26dopt%3DAbstract Authors: De Rossi M, De Rossi A, Queiroz AM, Nelson Filho P This paper describes the case of a 12-year-old male patient who presented a severe lateral luxation of the maxillary central incisors due to a bicycle fall. Treatment involved suture of the soft tissues lacerations, and repositioning and splinting of the injured teeth, followed by endodontic treatment and periodontal surgery. After a 2-year follow-up, clinical and radiographic evaluation revealed that the incisors presented satisfactory esthetic and functional demands. PMID: 19784475 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2843011 Tue, 29 Sep 2009 22:50:03 +0100 2843011 http://www.medworm.com/index.php?rid=2783007&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738939%26dopt%3DAbstract In conclusion, biofunctionalization of the implant surface might interfere in the bone apposition around implants, especially in terms of bone density. Different concentrations of bioactive peptide lead to different results. PMID: 19738939 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2783007 Fri, 11 Sep 2009 13:40:03 +0100 2783007 http://www.medworm.com/index.php?rid=2783006&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738940%26dopt%3DAbstract In conclusion, the Calen paste mixed with 0.4% CHX allowed an adequate tissue response, whereas the UltraCal paste mixed with 2% CHX showed unsatisfactory results. PMID: 19738940 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2783006 Fri, 11 Sep 2009 13:40:03 +0100 2783006 http://www.medworm.com/index.php?rid=2783005&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738941%26dopt%3DAbstract Authors: Pinheiro CR, Guinesi AS, Pizzolitto AC, Bonetti-Filho I Using the agar diffusion method, this study evaluated the in vitro antimicrobial activity of the commercial endodontic sealers Acroseal and Epiphany, a castor-oil based experimental sealer, Polifil, and a primer agent (Epiphany self-etching primer), against Enterococcus faecalis. Zinc oxide and eugenol cement (ZOE) served as control. Five wells per dish were made at equidistant points and immediately filled with the test and control materials. After incubation of the dishes at 37 degrees C for 24 h and 48 h, the diameter of the zones of microbial growth inhibition produced around the wells was measured (in mm) with a millimeter rule. After 48 h, the diameters of the zones of microbial growth inhibition were the same as th... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2783005 Fri, 11 Sep 2009 13:40:03 +0100 2783005 http://www.medworm.com/index.php?rid=2783004&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738942%26dopt%3DAbstract Authors: Martínez Lalis R, Esaín ML, Kokubu GA, Willis J, Chaves C, Grana DR The purpose of this study was compare the biocompatibility of modified Portland cement (CPM) and mineral trioxide aggregate (MTA) in a subcutaneous rat model. Twenty-four male Wistar rats were used. Three silicon tubes were placed on the dorsal subcutaneous tissue of each animal: one tube contained MTA, one tube contained CPM and the other was an empty tube. The rats were sacrificed in 3 groups of 8 animals at 7, 14 and 30 postoperative days, respectively. Tissue samples were fixed in 10% buffered formalin, embedded in paraffin, and serial sections were cut and stained with hematoxylin and eosin, Masson Trichrome and Luna's stain. At day 7, the empty tubes displayed a mild inflammatory infiltrate. In... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2783004 Fri, 11 Sep 2009 13:40:03 +0100 2783004 http://www.medworm.com/index.php?rid=2783003&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738943%26dopt%3DAbstract In conclusion, the association of calcium hydroxide and SLS (HCT20) combines the beneficial properties of these solutions and was not harmful to the fibroblast cell line, seeming to be a suitable endodontic irrigating solution. PMID: 19738943 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2783003 Fri, 11 Sep 2009 13:40:03 +0100 2783003 http://www.medworm.com/index.php?rid=2783002&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738944%26dopt%3DAbstract This study evaluated the effect of gamma irradiation on fluoride release and antibacterial activity of FluroShield (FS) and Clearfil Protect Bond (CPB). Four groups were formed: G1-FS + gamma; G2-FS without gamma; G3-CPB + gamma; G4-CPB without gamma. For fluoride release analysis, 12 disks of each material were prepared and covered with nail polish, except for one side (50.4 mm(2) area). G1 and G3 were sterilized with a 14.5 KGy dose at 27 degrees C for 24 h, while G2 and G4 (controls) were not sterilized and were maintained under the same time and temperature conditions. Fluoride release measurements were made in duplicate (n=6) by an ion specific electrode. The antibacterial activity of the CPB and FS against Streptococcus mutans after gamma sterilization was evaluated by the agar-disc ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2783002 Fri, 11 Sep 2009 13:40:03 +0100 2783002 http://www.medworm.com/index.php?rid=2783001&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738945%26dopt%3DAbstract This study evaluated the effect of denture base polymer type (heat- and microwave-polymerized), ridge lap surface treatment (with and without methyl methacrylate-MMA etching) and thermocycling on the microtensile bond strength (microTBS) of Biotone acrylic teeth. Flat-ground, ridge-lap surface of posterior artificial teeth were bonded to cylinders of each denture base resin, resulting in the following groups (n=6): G1a - Clássico/with MMA etching; G1b - Clássico/without MMA etching; G2a - OndaCryl/with MMA etching; G2b - OndaCryl/without MMA etching. Rectangular bar specimens with a cross-sectional area of 1 mm(2) were prepared. Half of the bars in each group were thermocycled (5,000 cycles between 4 degrees C and 60 degrees C). microTBS testing was performed in an universal test... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2783001 Fri, 11 Sep 2009 13:40:03 +0100 2783001 http://www.medworm.com/index.php?rid=2783000&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738946%26dopt%3DAbstract Authors: Consani RL, Azevedo DD, Mesquita MF, Mendes WB, Saquy PC The present study evaluated the effect of repeated simulated microwave disinfection on physical and mechanical properties of Clássico, Onda-Cryl and QC-20 denture base acrylic resins. Aluminum patterns were included in metallic or plastic flasks with dental stone following the traditional packing method. The powder/liquid mixing ratio was established according to the manufacturer's instructions. After water-bath polymerization at 74 degrees C for 9 h, boiling water for 20 min or microwave energy at 900 W for 10 min, the specimens were deflasked after flask cooling and finished. Each specimen was immersed in 150 mL of distilled water and underwent 5 disinfection cycles in a microwave oven set at 650 W for 3 min. Non-... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2783000 Fri, 11 Sep 2009 13:40:03 +0100 2783000 http://www.medworm.com/index.php?rid=2782999&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738947%26dopt%3DAbstract This study evaluated the effect of 3 casting atmospheres on the metal-ceramic bond strength (MCBS) of 2 Ni-Cr alloys, with beryllium (Fit Cast V) and without beryllium (Fit Cast SB). Sixty acrylic resin patterns (8 mm long and 5 mm diameter) were obtained using a fluorocarbon resin matrix. Wax was used to refine the surface of acrylic resin patterns that were invested and cast in an induction casting machine under normal, vacuum, and argon atmospheres at a temperature of 1340 degrees C. The castings were divested manually and airborne-particle abraded with 100-microm aluminum-oxide. Ten castings were obtained for each group. The IPS Classic V ceramic was applied (2 mm high and 5 mm diameter). The shear bond strength was tested in a mechanical testing machine with a crosshead speed of 2.0 m... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2782999 Fri, 11 Sep 2009 13:40:03 +0100 2782999 http://www.medworm.com/index.php?rid=2782998&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738948%26dopt%3DAbstract This study evaluated the fracture strength of teeth restored with bonded ceramic inlays and overlays compared to sound teeth. Thirty sound human maxillary premolars were assigned to 3 groups: 1- sound/unprepared (control); 2- inlays and 3- overlays. The inlay cavity design was Class II MOD preparation with an occlusal width of 1/2 of the intercuspal distance. The overlay cavity design was similar to that of the inlay group, except for buccal and palatal cusp coverage The inlay and overlay groups were restored with feldspathic porcelain bonded with adhesive cement. The specimens were subjected to a compressive load until fracture. Data were analyzed statistically by the Kruskal-Wallis test at 5% significance level. The fracture strength means (KN) were: Sound/unprepared group = 1.17, Inlay ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2782998 Fri, 11 Sep 2009 13:40:03 +0100 2782998 http://www.medworm.com/index.php?rid=2782997&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738949%26dopt%3DAbstract In conclusion, intramucosal zirconia inserts did not affect the health of oral mucosa and provide adequate retention and stability of the complete denture and comfort to the patients. PMID: 19738949 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2782997 Fri, 11 Sep 2009 13:40:03 +0100 2782997 http://www.medworm.com/index.php?rid=2782996&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738950%26dopt%3DAbstract In conclusion, ridge lap surface grinding with an aluminum oxide abrasive stone provided the highest bond strength, though it differed significantly only when compared to diatorics. The other surface treatments provided similar bond between the acrylic denture base and teeth. PMID: 19738950 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2782996 Fri, 11 Sep 2009 13:40:03 +0100 2782996 http://www.medworm.com/index.php?rid=2782995&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738951%26dopt%3DAbstract Authors: Romeo U, Del Vecchio A, Palaia G, Tenore G, Visca P, Maggiore C The aim of this study was to compare the peripheral bone damage induced by different cutting systems. Four devices were tested: Er:YAG laser (2.94 mm), Piezosurgery, high-speed drill and low-speed drill. Forty-five bone sections, divided into 9 groups according to different parameters, were taken from pig mandibles within 1 h post mortem. Specimens were fixed in 10% buffered formalin, decalcified and cut in thin sections. Four different parameters were analyzed: cut precision, depth of incision, peripheral carbonization and presence of bone fragments. For statistical analysis, the Kruskal-Wallis test was applied to assess equality of sample medians among groups. All sections obtained with the Er:YAG laser showed p... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2782995 Fri, 11 Sep 2009 13:40:03 +0100 2782995 http://www.medworm.com/index.php?rid=2782994&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19738952%26dopt%3DAbstract Authors: Goursand D, Paiva SM, Zarzar PM, Pordeus IA, Grochowski R, Allison PJ The Parental-Caregiver Perceptions Questionnaire (P-CPQ) is an instrument that assesses a parent's or a caregiver's perceptions regarding the impact of children's oral health status on quality of life. The aim of this study was to evaluate the psychometric properties of the Brazilian version of the P-CPQ. Following translation and cross-cultural adaptation, the P-CPQ was tested on 123 parents and caregivers of children between 11 and 14 years of age with dental caries and malocclusions. The parents/caregivers were recruited at dental clinics of the Federal University of Minas Gerais, where their children were receiving dental care. Psychometric properties were assessed through internal consistency, test-rete... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2782994 Fri, 11 Sep 2009 13:40:03 +0100 2782994 http://www.medworm.com/index.php?rid=2531225&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466224%26dopt%3DAbstract Authors: Mjör IA Permeability involves the passage of fluids, ions, molecules, particulate matter and bacteria into and through a substance or tissue under different and varying conditions. The permeability of the dentin is essential to support the physiology and reaction patterns of the pulp-dentin organ. Nutrients and impulses are transported from the pulp via the odontoblast process and the contents of its tubules maintain the dentin as a vital tissue. However, the main interest of this paper focuses on penetration from the outside towards the pulp rather than from the pulp towards the outside. The present overview centers on the dentinal tubules; how they are formed and how they change as a result of normal and abnormal function, age, and pathological processes and the effect ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531225 Sat, 27 Jun 2009 15:13:03 +0100 2531225 http://www.medworm.com/index.php?rid=2531224&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466225%26dopt%3DAbstract In conclusion, in the present study, the experimental AZ-based paste 1 was considered as biocompatible as the control matrial (GP), while experimental paste 2 was irritating to rat subcutaneous tissue. PMID: 19466225 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531224 Sat, 27 Jun 2009 15:13:03 +0100 2531224 http://www.medworm.com/index.php?rid=2531223&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466226%26dopt%3DAbstract This study compared the cytotoxicity of an experimental epoxy-resin and calcium hydroxide-based cement (MBPc), gray mineral trioxide aggregate (MTA) and white mineral trioxide aggregate (WMTA) using the agar overlay method with neutral red dye. L929 cells were seeded into 6-well culture plates where 48-h set test materials were placed on the agar overlay, in triplicate. Teflon and natural rubber served as negative and positive controls. After an incubation period of 24 h at 37 degrees C in a humidified atmosphere of 5% CO2 in air, a discolored area around the samples and the positive controls could be observed and measured per quadrant. The mean values were compared and converted into grades to classify the results according to the table of cytotoxicity grades according to the Standard Ope... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531223 Sat, 27 Jun 2009 15:13:03 +0100 2531223 http://www.medworm.com/index.php?rid=2531222&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466227%26dopt%3DAbstract Authors: Nicoletti MA, Siqueira EL, Bombana AC, Oliveira GG Accelerated stability tests are indicated to assess, within a short time, the degree of chemical degradation that may affect an active substance, either alone or in a formula, under normal storage conditions. This method is based on increased stress conditions to accelerate the rate of chemical degradation. Based on the equation of the straight line obtained as a function of the reaction order (at 50 and 70 degrees C) and using Arrhenius equation, the speed of the reaction was calculated for the temperature of 20 degrees C (normal storage conditions). This model of accelerated stability test makes it possible to predict the chemical stability of any active substance at any given moment, as long as the method to quantify the ch... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531222 Sat, 27 Jun 2009 15:13:03 +0100 2531222 http://www.medworm.com/index.php?rid=2531221&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466228%26dopt%3DAbstract Authors: Lana PE, Scelza MF, Silva LE, Mattos-Guaraldi AL, Hirata Júnior R The effectiveness of calcium hydroxide pastes: Calen and PMCC-Calen associated to chemo-mechanical preparation was assessed on Enterococcus faecalis grown within root canals. Seventy incisors were inserted into TSB medium, sterilized and contaminated with E. faecalis. Culture medium was replaced each 24 h and incubated at 37 degrees C for 72 h. After chemo-mechanical preparation, root canals were filled with Calen or PMCC-Calen (7 or 14 days). Pastes were removed and teeth were inserted into test tubes containing Enterococcosel broth. Calen paste (maintained for 7 and 14 days) induced 70% elimination of enterococci and PMCC-Calen 100% elimination only after maintenance for 14 days. These medications were si... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531221 Sat, 27 Jun 2009 15:13:03 +0100 2531221 http://www.medworm.com/index.php?rid=2531220&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466229%26dopt%3DAbstract Authors: Villena RS, Tenuta LM, Cury JA This in situ crossover and blind study was conducted to investigate the effect of professional acidulated phosphate fluoride (APF) gel application time on the subsequent inhibition of enamel demineralization. During 3 phases of 28 days each, 15 volunteers wore palatal appliances containing 4 enamel blocks, which were subjected to 3 treatment groups: not treated (control) and pre-treated with APF gel for 1 or 4 min. Dental plaque was allowed to accumulate on the blocks and the appliances were immersed in 10% sucrose solution 3 times a day simulating a cariogenic challenge. After each phase, the blocks were removed to evaluate enamel demineralization and concentration of fluoride (F) remaining after the cariogenic challenge. F formed on enamel was ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531220 Sat, 27 Jun 2009 15:13:03 +0100 2531220 http://www.medworm.com/index.php?rid=2531219&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466230%26dopt%3DAbstract Authors: Osternack FH, Caldas DB, Rached RN, Vieira S, Platt JA, Almeida JB This in vitro study evaluated the Knoop hardness of the composite resins Charisma (C) and Durafill VS (D) polymerized in 3 different conditions: at room temperature (A) (23 +/- 1 degrees C); refrigerated at 4 +/- 1 degrees C and immediately photo-activated after removal from the refrigerator (0); and, refrigerated at 4 +/- 1 degrees C and photo-activated after a bench time of 15 min at room temperature (15). One hundred and twenty specimens (4 mm diameter and 2 mm depth) were made using a stainless steel mold and following manufacturer's instructions. All specimens were tested immediately after polymerization (I) and after 7 days of water storage in the dark at room temperature (7d). The data were subjected to ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531219 Sat, 27 Jun 2009 15:13:03 +0100 2531219 http://www.medworm.com/index.php?rid=2531218&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466231%26dopt%3DAbstract In conclusion, bleaching procedures on enamel with CL did not exacerbate the demineralization, but should be indicated with caution. PMID: 19466231 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531218 Sat, 27 Jun 2009 15:13:03 +0100 2531218 http://www.medworm.com/index.php?rid=2531217&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466232%26dopt%3DAbstract In conclusion, the compressive strength of the tested materials photoactivated with a QTH and a LED light source was influenced by the energy density employed and the chemical composition of the esthetic restorative materials. PMID: 19466232 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531217 Sat, 27 Jun 2009 15:13:03 +0100 2531217 http://www.medworm.com/index.php?rid=2531216&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466233%26dopt%3DAbstract Authors: Casarin RC, Ribeiro FV, Sallum AW, Sallum EA, Nociti-Jr FH, Casati MZ The aim of this study was to evaluate the root surface defect produced by hand curettes and ultrasonic tips with different power settings. Forty root surfaces were divided into 4 groups according the treatment: Gracey curettes, ultrasonic scaler at 10% power, ultrasonic scaler at 50% power and ultrasonic scaler at 100% power. Each specimen was instrumented with 15 strokes and the and divided in the middle to evaluate: (1) the defect depth produced by the instrumentation and (2) contact area of the instrument tips, which was analyzed by scanning electron microscopy. ANOVA and Tukey's test were used for statistical analysis (alpha =0.05). The results (mean +/- SD) of the contact area showed significantly great... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531216 Sat, 27 Jun 2009 15:13:03 +0100 2531216 http://www.medworm.com/index.php?rid=2531215&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466234%26dopt%3DAbstract In conclusion, SCCs of the lower lip and tongue did not reveal significant differences in the expression of E-cadherin and CD44v6. The expression of these adhesion molecules revealed association only with tumor histological grading of malignancy. Therefore, these results suggest that E-cadherin and CD44v6 may not help elucidating the differences between the biological behavior of SCCs of the lower lip and tongue. PMID: 19466234 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531215 Sat, 27 Jun 2009 15:13:03 +0100 2531215 http://www.medworm.com/index.php?rid=2531214&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466235%26dopt%3DAbstract In conclusion, although the diabetic children seemed to have better oral health habits than the control children, there is a need for more information regarding oral hygiene and healthy habits. PMID: 19466235 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531214 Sat, 27 Jun 2009 15:13:03 +0100 2531214 http://www.medworm.com/index.php?rid=2531213&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466236%26dopt%3DAbstract Authors: Rosales AC, Esteves SC, Jorge J, Almeida OP, Lopes MA In spite of its recognized benefits in the treatment of malignant tumors, radiation therapy have several side effects in the head and neck region. The evaluation of oral conditions by a dentist is important to prevent or minimize these problems. The aim of this retrospective review was to analyze the dental needs in 357 patients who received radiotherapy in the head and neck region and were treated at Orocentro/FOP/UNICAMP, between January 1990 and December 2004. Review of patient files showed that dental examination before radiotherapy was not performed in 148 patients (41.5%) and was done in 209 patients (58.5%). From the total of examined patients, 94 (45%) did not require dental procedures at the moment of examination, ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531213 Sat, 27 Jun 2009 15:13:03 +0100 2531213 http://www.medworm.com/index.php?rid=2531212&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466237%26dopt%3DAbstract In conclusion, the swallowing method produced smaller mandibular posterior displacement than the other methods. PMID: 19466237 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531212 Sat, 27 Jun 2009 15:13:03 +0100 2531212 http://www.medworm.com/index.php?rid=2531211&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19466238%26dopt%3DAbstract Authors: Victorino FR, Bernardes RA, Baldi JV, Moraes IG, Bernardinelli N, Garcia RB, Bramante CM The mandibular canine is usually considered a single-rooted tooth with a single root canal. However, two canals and more rarely two roots may also occur. This paper reports the case of a patient with bilateral mandibular canines with two roots and two root canals. The initial periapical radiographs of the mandibular right and left canines for endodontic treatment revealed the presence of two roots in each tooth. After coronal opening, the cervical third was prepared with a SX file of the ProTaper system and root canal length was confirmed using Root ZX electronic apex locator. Root canal preparation was completed with the series of ProTaper instruments and the root canal was filled with gu... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=2531211 Sat, 27 Jun 2009 15:13:03 +0100 2531211 http://www.medworm.com/index.php?rid=1994841&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19031648%26dopt%3DAbstract In conclusion, some of the selected markers of inflammation are differentially expressed in healthy and periodontitis patients. Cytokine profile analysis may be further explored to distinguish the periodontitis patients from the ones free of disease and also to be used as a measure of risk. The present data, however, are limited and larger sample size studies are required to validate the findings of the specific biomarkers. PMID: 19031648 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1994841 Sat, 29 Nov 2008 04:25:43 +0100 1994841 http://www.medworm.com/index.php?rid=1994840&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D19031649%26dopt%3DAbstract Authors: Lins RD, Figueiredo CR, Queiroz LM, da Silveira EJ, Freitas Rde A In order to contribute to the knowledge of the pathogenesis of periodontal disease, an immunohistochemical analysis of the density of inflammatory mononucleated cells and the number of dendritic cells was performed using anti-CD4, anti-CD20, anti-CD25, anti-CD68 and anti-protein S-100 antibodies in 17 cases of chronic gingivitis (CG) and 25 of chronic periodontitis (CP). The CD4+ and CD68+ cells exhibited a diffuse distribution in the connective tissue. CD20+ cell distribution was predominantly in groups and the CD25+ cells exhibited a diffuse or focal distribution. The S-100+ cells were identified in the epithelium and the lamina propria, exhibiting distinct morphology and number. The statistical analysis showe... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1994840 Sat, 29 Nov 2008 04:25:43 +0100 1994840 http://www.medworm.com/index.php?rid=1907286&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949287%26dopt%3DAbstract The objective of this study was to evaluate the occurrence of apoptosis and epithelial thickness in reticular and erosive forms of OLP. 15 samples of OLP each type (reticular and erosive) plus 10 of healthy mucosa were collected and processed. After morphometry, the apoptotic index and epitelial thickness were obtained. TUNEL and M30 CytoDEATH immunohistochemical assay were used to validate the morphologic criteria used. Apoptosis in the erosive OLP was significantly more intense than in the reticular type and both forms of OLP presented more apoptosis than the healthy oral mucosa. Healthy oral mucosa was thicker than both OLP forms and thicker in OLP reticular form than in the erosive one. The clinical differences between reticular and erosive forms of OLP are related to variations in epi... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907286 Sun, 26 Oct 2008 07:55:22 +0100 1907286 http://www.medworm.com/index.php?rid=1907285&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949288%26dopt%3DAbstract Authors: Gomes AP, Johann JE, Lovato GG, Ferreira AM Previous studies have shown that the number of mast cells is increased in ultraviolet (UV) irradiated skin and in neoplasias. Actinic cheilitis (AC) is a lesion caused by excessive exposure to sunlight that can transform into lip squamous cell carcinoma. The aim of this study was to compare the number of mast cells in 4 groups: NOM = normal oral mucosa (n=6); MDAC = mild dysplasia in actinic cheilitis (n=13); SDAC = severe dysplasia in actinic cheilitis (n=13); and LSCC = lip squamous cell carcinoma (n=15). The sections were stained by histochemical technique of blue toluidine and visual counting was performed with the aid of a reticulum coupled to the microscope ocular. A calibrated observer performed the count in 5 fields by case a... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907285 Sun, 26 Oct 2008 07:55:22 +0100 1907285 http://www.medworm.com/index.php?rid=1907284&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949289%26dopt%3DAbstract In conclusion, PRO was able to induce changes in PMMA surface properties, such as roughness, which could be related to microbial adhesion. PMID: 18949289 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907284 Sun, 26 Oct 2008 07:55:22 +0100 1907284 http://www.medworm.com/index.php?rid=1907283&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949290%26dopt%3DAbstract This study evaluated the irradiance of curing units through core and veneered hot-pressed ceramics as well as the transmittance of these materials. Discs of 0.7, 1.4 and 2 mm in thickness of Empress (EMP) and Empress Esthetic (EST), and 0.8 (n=5) and 1.1 mm (n=5) thickness of Empress 2 (E2) were obtained. For E2, two of the 0.8-mm-thick discs were covered with dentin (1.2- and 1.4-mm-thick) and two with dentin + enamel (1.5-mm-thick). The 1.1-mm-thick specimens were submitted to the same veneering procedures. Specimens were evaluated by UV-Vis transmittance analysis and the percentage of transmittance was recorded. Irradiance through each specimen was evaluated with a quartz-tungsten-halogen (QTH), used in continuous or intermittent exposure modes, or a blue light-emitting diode (LED). Dat... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907283 Sun, 26 Oct 2008 07:55:22 +0100 1907283 http://www.medworm.com/index.php?rid=1907282&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949291%26dopt%3DAbstract Authors: Miéssi AC, Goiato MC, Santos DM, Dekon SF, Okida RC The aim of this study was to evaluate the dimensional changes of denture bases made from different resins after different storage periods. For this purpose, 25 sets of plaster models/resin bases were prepared using 4 acrylic resins submitted to two types of polymerization: 1- QC-20 submitted to polymerization by microwave energy; 2- QC-20 submitted to polymerization by water hot bath; 3- Vipi Cril submitted to polymerization by water hot bath; 4- Vipi Wave submitted to polymerization by microwave energy; and 5- Onda Cryl submitted to polymerization by microwave energy. After polymerization, the specimens were sectioned for accuracy readings using a comparison microscope. Readings were taken at 3 points: the crests of the... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907282 Sun, 26 Oct 2008 07:55:22 +0100 1907282 http://www.medworm.com/index.php?rid=1907281&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949292%26dopt%3DAbstract The objective of this study was to evaluate the retention force of T-bar clasps made from commercially pure titanium (CP Ti) and cobalt-chromium (Co-Cr) alloy by the insertion/removal test simulating 5 years use. Thirty-six frameworks were cast from CP Ti (n=18) and Co-Cr alloy (n=18) with identical prefabricated patterns on refractory casts from a distal extension mandibular hemi-arch segment. The castings were made on a vacuum-pressure machine, under vacuum and argon atmosphere. Each group was subdivided in three, corresponding to 0.25 mm, 0.50 mm and 0.75 mm undercuts, respectively. No polishing procedures were performed to ensure uniformity. The specimens were subjected to an insertion/removal test and data was analyzed statistically to compare CP Ti and Co-Cr alloy in the same undercu... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907281 Sun, 26 Oct 2008 07:55:22 +0100 1907281 http://www.medworm.com/index.php?rid=1907280&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949293%26dopt%3DAbstract Authors: Forte FD, Moimaz SA, Sampaio FC The aim of this study was to evaluate the urinary fluoride excretion of 2- to 7-year-old children exposed to different water fluoride concentrations in the city of Catolé do Rocha, PB, Brazil. Forty-two children were allocated to 3 groups according to the concentration of fluoride in the water: G1 (n=10; 0.5-1.0 ppm F), G2 (n=17; 1.1-1.5 ppm F) and G3 (n= 15; >1.51 ppm F). The study was carried out in two 1-week phases with 1-month interval between the moments of data collection: in the first phase, the children used a fluoride toothpaste (FT) (1,510 ppm F) for 1 week, whereas in the second phase a non-fluoride toothpaste (NFT) was used. The urine was collected in a 24-h period in each week-phase according to Marthaler's protocol. The ur... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907280 Sun, 26 Oct 2008 07:55:22 +0100 1907280 http://www.medworm.com/index.php?rid=1907279&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949294%26dopt%3DAbstract In conclusion, the tested etch-and-rinse systems had a better performance in terms of bond durability over time than the self-etching systems. PMID: 18949294 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907279 Sun, 26 Oct 2008 07:55:22 +0100 1907279 http://www.medworm.com/index.php?rid=1907278&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949295%26dopt%3DAbstract Authors: Barbizam JV, Trope M, Teixeira EC, Tanomaru-Filho M, Teixeira FB The aim of this in vitro study was to evaluate the bond strength of Epiphany resin-based sealer to dentin walls after placement of calcium hydroxide [Ca(OH)2] dressings. Fifteen extracted single-rooted human teeth were instrumented using 2.5% NaOCl + EDTA as irrigants. The teeth were randomly assigned to 3 groups (n=5), according to the intracanal dressing: G1= Ca(OH)2 + saline; G2= Ca(OH)2 + 2% chlorhexidine gluconate (CHX) gel; and G3= saline (control). After 10 days of storage in 100% humidity at 37 masculineC, the dressings were removed and the root canals were filled with Epiphany sealer. After additional 48 h of storage, the specimens were sectioned transversally into 2-mm-thick discs. Push-out tests were p... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907278 Sun, 26 Oct 2008 07:55:22 +0100 1907278 http://www.medworm.com/index.php?rid=1907277&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949296%26dopt%3DAbstract This study evaluated in vitro the cytotoxicity of four root canal sealers (Topseal, EndoRez, TubliSeal and Kerr Pulp Canal Sealer E.W.T.) and their effects on reactive oxygen/nitrogen intermediate induction by mouse peritoneal macrophages. Thioglycollate-induced cells were obtained from Swiss mice by peritoneal lavage with 5 mL 10 mM phosphate-buffered saline, washed twice and resuspended (106 cells/mL) in appropriate medium for each test. Cytotoxicity was determined by the presence of hydrogen peroxide (H2O2) and nitric oxide (NO) by the peroxidase-dependent oxidation of phenol red and Griess reaction, respectively. Sealer suspensions were obtained in two different concentrations from each material: 18 mg/mL and 9 mg/mL, established according to compatibility parameters following MTT assa... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907277 Sun, 26 Oct 2008 07:55:22 +0100 1907277 http://www.medworm.com/index.php?rid=1907276&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949297%26dopt%3DAbstract Authors: Murad C, Fariniuk LF, Fidel S, Fidel RA, Sassone LM This in vitro study evaluated, using a bacterial leakage model, whether intracanal medication with calcium hydroxide [Ca(OH)2]-based pastes prepared with different vehicles, has inhibitory effect on corono-apical leakage of bacteria. Forty instrumented human canines were dressed with Ca(OH)2 p.a. associated with: G1= distilled water; G2= polyethylene glycol (PG); G3= PG + CMCP; and G4= glycerin. Five teeth with intact crowns served as negative controls and 5 instrumented teeth without temporary dressing served as positive controls. All teeth were mounted in a 2-chamber apparatus and then exposed to human saliva for 63 days. Leakage was recorded when turbidity was observed in the lower chamber. Fifty percent of the samples of ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907276 Sun, 26 Oct 2008 07:55:22 +0100 1907276 http://www.medworm.com/index.php?rid=1907275&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949298%26dopt%3DAbstract This study evaluated histopathologically different methods of experimental induction of periapical periodontitis. The radiographic and microbiological evaluations have been performed in a previous investigation. Fifty-seven root canals from dogs' teeth were assigned to 4 groups. In GI (n=14) and GII (n=14), the root canals were exposed to oral environment for 180 days; in GIII (n=14) and GIV (n=15) the root canals were exposed for 7 days and then the access cavities were restored and remained sealed for 53 days. The root apices of GI and GIII were perforated, whilst those of GII and GIV remained intact. After induction of periapical periodontitis, the dogs were euthanized. Serial sections were obtained and stained with hematoxylin and eosin. Data of the histopathological evaluation were su... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907275 Sun, 26 Oct 2008 07:55:22 +0100 1907275 http://www.medworm.com/index.php?rid=1907274&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949299%26dopt%3DAbstract In conclusion, cervical preflaring improved IAF fitting to the canals at the WL in mesiobuccal roots of maxillary first molars. The rotary instruments evaluated in this study did not differ from each other regarding the discrepancies produced between the IAF size and canal diameter at the WL. PMID: 18949299 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907274 Sun, 26 Oct 2008 07:55:22 +0100 1907274 http://www.medworm.com/index.php?rid=1907273&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949300%26dopt%3DAbstract This study performed a mapping of the distribution of CNPq researchers, revealing a concentration in the southeast region of the country, especially in the state of São Paulo. The findings of the present study also demonstrate the important contribution of grant holders to the scientific production in dentistry in Brazil. PMID: 18949300 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907273 Sun, 26 Oct 2008 07:55:22 +0100 1907273 http://www.medworm.com/index.php?rid=1907272&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18949301%26dopt%3DAbstract This article reports the case of a 55-year-old female patient who presented with unsatisfactory temporary crowns in the right mandibular premolars and molars, and a premolar-to-molar fixed partial denture in the left side. The clinical and radiographic examinations revealed a fracture of the left first premolar that was a retainer of the fixed partial denture and required extraction. Initially, the acrylic resin crowns were replaced by new ones, and a provisional RPD was made using acrylic resin and orthodontic wire clasps to resolve the problem arising from the loss of the fixed partial denture. Considering the patient's high esthetic demands, the treatment options for the definitive prosthetic treatment were discussed with her and rehabilitation with implant-supported dentures was propos... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1907272 Sun, 26 Oct 2008 07:55:22 +0100 1907272 http://www.medworm.com/index.php?rid=1540540&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568220%26dopt%3DAbstract Authors: Moi GP, Tenuta LM, Cury JA This blind and randomized study tested in vitro, using validated protocols, the anticaries potential of an experimental fluoride mouthrinse. One-hundred enamel slabs, half sound and half with caries-like lesions (carious), all with known surface microhardness (SMH), were submitted to 3 treatment groups: A) a placebo mouthrinse (negative control); B) a positive control mouthrinse containing 0.05% NaF; and C) an experimental formulation containing 0.05% NaF and cetylpyridinium chloride as an antibacterial substance. To evaluate the formation of F products on enamel, sound (n=10) and carious (n=10) slabs were treated with the formulations during 10 min and loosely and firmly-bound F formed in enamel were determined after extraction with alkali and acid,... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540540 Wed, 25 Jun 2008 20:16:06 +0100 1540540 http://www.medworm.com/index.php?rid=1540539&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568221%26dopt%3DAbstract Authors: Silva Neto JM, Santos RL, Sampaio MC, Sampaio FC, Passos IA The aim of this ex vivo study was to compare visual clinical and radiographic examinations to the histological analysis for proximal caries diagnosis in extracted permanent molars and premolars. The relationship between clinical aspects and carious lesions was also evaluated. Eighty-eight proximal surfaces (44 freshly extracted teeth) were longitudinally sectioned with a 370-microm diamond disk, thinned with wet silicon carbide paper and observed with a stereomicroscope at x40 magnification. Sensitivity and specificity were 65.6% and 83.3% for clinical examination and 29.7% and 95.8% for radiographic examination, respectively. Kappa values ranged from 0.64 to 0.91. The white spots corresponded to lesions restricted to... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540539 Wed, 25 Jun 2008 20:16:06 +0100 1540539 http://www.medworm.com/index.php?rid=1540538&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568222%26dopt%3DAbstract Authors: Leonardo MR, Borges AT, Martins-Júnior W, Queiroz AM, Assed S The aim of this study was to evaluate in situ changes in the alveolar crest bone height around immediate implant-supported crowns in comparison to tooth-supported crowns (control) with the cervical margins located at the bone crest level, without occlusal load. In Group I, after extraction of 12 mandibular premolars from 4 adult dogs, implants from Branemark System (MK III TiU RP 4.0 x 11.5 mm) were placed to retain complete acrylic crowns. In Group II, premolars were prepared to receive complete metal crowns. Sixteen weeks after placement of the crowns (38 weeks after tooth extraction), the height of the alveolar bone crest was measured with a digital caliper. Data were analyzed statistically by the Mann-Whitn... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540538 Wed, 25 Jun 2008 20:16:06 +0100 1540538 http://www.medworm.com/index.php?rid=1540537&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568223%26dopt%3DAbstract This study evaluated, under scanning electron microscopy (SEM), the quality of the surface finishing of unused rotary endodontic instruments. Fifty sizes 20, 25 and 30 rotary files from different commercial brands (ProFile, Protaper, Race, Hero and K3 Endo) were removed directly from their packages and had their final 3 mm examined with a scanning electron microscope at x190 magnification with no previous preparation. The images were evaluated by 3 skillful, calibrated, blinded observers according to the following criteria: cutting edge, debris, grooves, microcavities, tip shape, tip position, scraping and transition angle. Data were recorded in worksheets designed for the study. Irregular edges were observed in 50-100% of the files. Except for ProFile, all commercial brands presented surf... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540537 Wed, 25 Jun 2008 20:16:06 +0100 1540537 http://www.medworm.com/index.php?rid=1540536&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568224%26dopt%3DAbstract This article describes and discusses a method to determine root curvature radius by using cone-beam computed tomography (CBCT). The severity of root canal curvature is essential to select instrument and instrumentation technique. The diagnosis and planning of root canal treatment have traditionally been made based on periapical radiography. However, the higher accuracy of CBCT images to identify anatomic and pathologic alterations compared to panoramic and periapical radiographs has been shown to reduce the incidence of false-negative results. In high-resolution images, the measurement of root curvature radius can be obtained by circumcenter. Based on 3 mathematical points determined with the working tools of Planimp(R) software, it is possible to calculate root curvature radius in both ap... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540536 Wed, 25 Jun 2008 20:16:06 +0100 1540536 http://www.medworm.com/index.php?rid=1540535&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568225%26dopt%3DAbstract Authors: Bosco JM, Oliveira SR, Bosco AF, Schweitzer CM, Jardim Júnior EG The aim of the present study was to evaluate the effects of local tetracycline on the occurrence of alveolar osteitis in rats, and on the microbiota associated to this infection. Forty Wistar rats were randomly assigned to 4 groups (n=10): I - the rats had the maxillary right incisor extracted and the alveolar wound did not receive any treatment; II - adrenaline and Ringer-PRAS were introduced into the alveolar wound; III - the alveolar wound was irrigated with sterile saline; and IV - the alveolar wound was irrigated with an aqueous solution of tetracycline. Microbial samples from the alveolar wounds were collected 2 days after surgery and inoculated on blood agar (with and without 8 microg/mL of tetracycli... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540535 Wed, 25 Jun 2008 20:16:06 +0100 1540535 http://www.medworm.com/index.php?rid=1540534&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568226%26dopt%3DAbstract Authors: Tanomaru JM, Leonardo MR, Tanomaru-Filho M, Silva LA, Ito IY The aim of this study was to evaluate the microbial distribution in the root canal system after periapical lesion induction in dogs' teeth using different methods. Fifty-two root canals were assigned to 4 groups (n=13). Groups I and II: root canals were exposed to the oral cavity for 180 days; groups III and IV: root canals were exposed for 7 days and then the coronal openings were sealed for 53 days. The root apices of groups I and III were perforated, while those of groups II and IV remained intact. After the experimental periods, the animals were euthanized and the anatomic pieces containing the roots were processed and stained with the Brown & Brenn method to assess the presence and distribution of microorgan... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540534 Wed, 25 Jun 2008 20:16:06 +0100 1540534 http://www.medworm.com/index.php?rid=1540533&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568227%26dopt%3DAbstract Authors: Silva RH, Porciúncula HF, Jardini RS, Pita AP, Ribeiro AP Electromyography is frequently used to measure the activity of masticatory muscles. It requires the precise setting of the electrodes, which demands the accurate location of the muscle to be evaluated. The purpose of this study was to investigate the accuracy of an external method to locate the buccinator muscle. Fifteen human cadavers were evaluated and planes were determined on the face using anatomic landmarks. An angle (a) was obtained at the intersection of these planes on the central point of buccinator muscle and measured with a protractor. The value of the angle allows locating the central point of buccinator muscle based on anatomic landmarks on the face. Statistical analysis of the collected data indicate... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540533 Wed, 25 Jun 2008 20:16:06 +0100 1540533 http://www.medworm.com/index.php?rid=1540532&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568228%26dopt%3DAbstract In conclusion, mechanical retention, either associated or not to chemical treatment, provided higher bond strength of the indirect composite resin to cpTi. PMID: 18568228 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540532 Wed, 25 Jun 2008 20:16:06 +0100 1540532 http://www.medworm.com/index.php?rid=1540531&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568229%26dopt%3DAbstract This study analyzed comparatively, by confocal laser scanning microscopy (CLSM), the depth of caries-like lesions produced by biological and chemical artificial models in permanent and primary dentin. Six primary molars and six premolars were used. The occlusal enamel was removed and a nail polish layer was applied on the specimens, except for a 4 x 2 mm area on dentin surface. Half of specimens were immersed in acid gel for 14 days (chemical model) and the other half was immersed in BHI broth with S. mutans for 14 days (biological model). After development of artificial caries, the crowns were longitudinally sectioned on the center of the carious lesion. Three measurements of carious dentin depth were made in each specimen by CLSM. Measurements depths were compared between the caries mode... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540531 Wed, 25 Jun 2008 20:16:06 +0100 1540531 http://www.medworm.com/index.php?rid=1540530&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568230%26dopt%3DAbstract Authors: Muller K, Morais J, Feine J As masticatory efficiency diminishes drastically in edentulous patients, several researchers have studied over the past two decades how dietary intake varies when different types of oral rehabilitation are provided. Since the use of implants to support prostheses in edentulous mandibles has been shown to significantly improve masticatory performance, the question remains as to whether this improvement will influence the nutritional status. The purose of this study was to evaluate the nutritional status of edentulous patients who randomly received either a mandibular conventional denture (CD) or an implant-supported overdenture (IP) 1 year previously. Weight, height, body composition and handgrip strength measurements were collected for analysis. Blo... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540530 Wed, 25 Jun 2008 20:16:06 +0100 1540530 http://www.medworm.com/index.php?rid=1540529&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568231%26dopt%3DAbstract This study described changes in mandibular movements during pronunciation of /m/ and /s/ sounds in Portuguese, in patients presenting dental wear before and after appliance insertion and tooth reconstruction. Subjects were divided into a control group of dentate patients and an experimental group of patients with incisal tooth wear due to bruxism. A magnetic jaw tracking device measured the jaw opening, and translations to left and right sides of the mandible during pronunciation of phonemes. Evaluations were carried out 1 week and immediately before appliance insertion; 24 h, 7, 30 and 60 days after appliance insertion; and 1 week and 1 month after tooth reconstruction. Data were submitted to two-way ANOVA, Mann-Whitney and Friedman tests (p<0.05). Jaw opening was different (p<0.05)... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540529 Wed, 25 Jun 2008 20:16:06 +0100 1540529 http://www.medworm.com/index.php?rid=1540528&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568232%26dopt%3DAbstract This article addresses diagnostic parameters that should be assessed in the treatment of extraction sockets with dental implant placement by presenting three case reports that emphasize the relevance of the amount of remaining bone walls. Diagnosis was based on the analysis of clinical and radiographic parameters (e.g.: bone defect morphology, remaining bone volume, presence of infections on the receptor site). Case 1 presents a 5-wall defect in the maxillary right central incisor region with severe root resorption, which was treated with immediate implant placement. Cases 2 and 3 present, respectively, two- and three-wall bone defects that did not have indication for immediate implants. These cases were first submitted to a guided bone regeneration (GBR) procedure with bone graft biomater... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540528 Wed, 25 Jun 2008 20:16:06 +0100 1540528 http://www.medworm.com/index.php?rid=1540527&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568233%26dopt%3DAbstract This article presents two cases of McCune-Albright syndrome in a middle-aged woman and a young girl. Both patients presented café-au-lait spots on the face and other parts of the body and expansion of the mandible with radiopaque-radiolucent areas with ground-glass radiographic appearance, and were diagnosed as having fibrous dysplasia and endocrine disorders. The patient of Case 1 had fibrous dysplasia on the upper and lower limbs, thorax, face and cranium, early puberty, hyperglycemia, hyperthyroidism and high serum alkaline phosphatase levels. The patient of Case 2 presented lesions on the upper limbs and evident endocrine disorders. In both cases presented in this article, the initial exam was made because of the mandibular lesion. However, a diagnosis of fibrous dysplasia must le... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540527 Wed, 25 Jun 2008 20:16:06 +0100 1540527 http://www.medworm.com/index.php?rid=1540526&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18568234%26dopt%3DAbstract This article reports a case of CG in the maxillary sinus of a 22-year-old man, manifesting as a swelling on the right maxilla associated with pain and nasal obstruction. Computed tomography (CT) imaging showed complete opacification of the right maxillary sinus with cortical bone expansion and destruction. Incisional biopsy showed a solid mass filling the sinus and histological examination showed foreign body reaction to cholesterol crystals. The microscopic findings associated to tooth vitality, CT images and absence of a cavity during the surgical procedure were compatible with the diagnosis of CG of the maxillary sinus. Complete surgical excision of the mass under general anesthesia was suggested, but the patient did not return to conclude the treatment. CG must be included in different... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1540526 Wed, 25 Jun 2008 20:16:06 +0100 1540526 http://www.medworm.com/index.php?rid=1406047&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438554%26dopt%3DAbstract This study evaluated bone response to a Ca- and P- enriched titanium (Ti) surface treated by a multiphase anodic spark deposition coating (BSP-AK). Two mongrel dogs received bilateral implantation of 3 Ti cylinders (4.1 x 12 mm) in the humerus, being either BSP-AK treated or untreated (machined - control). At 8 weeks postimplantation, bone fragments containing the implants were harvested and processed for histologic and histomorphometric analyses. Bone formation was observed in cortical area and towards the medullary canal associated to approximately 1/3 of implant extension. In most cases, in the medullary area, collagen fiber bundles were detected adjacent and oriented parallel to Ti surfaces. Such connective tissue formation exhibited focal areas of mineralized matrix lined by active os... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406047 Tue, 29 Apr 2008 19:23:57 +0100 1406047 http://www.medworm.com/index.php?rid=1406046&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438555%26dopt%3DAbstract Authors: Queiroz CS, Hara AT, Paes Leme AF, Cury JA Since the currently available pH-cycling models do not differentiate the anti-caries potential of dentifrices with low fluoride (F) concentration, two models were developed and tested in the present. Bovine enamel blocks were subjected to the models and treated with F solutions containing from 70 to 280 mug F/mL in order to validate them in terms of dose-response effect. The models were also tested by evaluating the dentifrices Colgate Baby (500 mug F/g, as a low fluoride dentifrice), Tandy (1,100 mug F/g, as an active F-dentifrice) and Crest (1,100 mug F/g, as positive control). Enamel mineral loss or gain was assessed by surface and cross-sectional microhardness, and lesion depth was analyzed by polarized light microscopy. The pH-cy... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406046 Tue, 29 Apr 2008 19:23:57 +0100 1406046 http://www.medworm.com/index.php?rid=1406045&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438556%26dopt%3DAbstract Authors: Souza-Filho FJ, Soares Ade J, Vianna ME, Zaia AA, Ferraz CC, Gomes BP The purposes of this study were to evaluate the effectiveness of 2% chlorhexidine (CHX) gluconate gel, calcium hydroxide [Ca(OH)2] and their combination with iodoform and zinc oxide powder as intracanal medications against select microorganisms, and to measure the pH changes caused by these medications. Antimicrobial activity was determined by the agar diffusion method. The zones of growth inhibition were measured and the results were analyzed statistically by Kruskal-Wallis test (p<0.05). The pH of the pastes was measured right after preparation, after 24 h and 1 week later. The largest mean zones of microbial inhibition were produced by 2% CHX gel, followed by Ca(OH)2 + 2% CHX gel + iodoform, Ca(OH)2 + ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406045 Tue, 29 Apr 2008 19:23:57 +0100 1406045 http://www.medworm.com/index.php?rid=1406044&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438557%26dopt%3DAbstract Authors: Estrela C, Leles CR, Hollanda AC, Moura MS, Pécora JD The aim of this study was to assess the prevalence and risk factors of apical periodontitis in endodontically treated teeth in a selected population of Brazilian adults. A total of 1,372 periapical radiographs of endodontically treated teeth were analyzed based on the quality of root filling, status of coronal restoration and presence of posts associated with apical periodontitis (AP). Data were analyzed statistically using odds ratio, confidence intervals and chi-square test. The prevalence of AP with adequate endodontic treatment was low (16.5%). This percentage dropped to 12.1% in cases with adequate root filling and adequate coronal restoration. Teeth with adequate endodontic treatment and poor coronal restoration ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406044 Tue, 29 Apr 2008 19:23:57 +0100 1406044 http://www.medworm.com/index.php?rid=1406043&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438558%26dopt%3DAbstract In conclusion, formocresol seems not to be able to inactive the toxic effects of endotoxin in connective tissues. PMID: 18438558 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406043 Tue, 29 Apr 2008 19:23:57 +0100 1406043 http://www.medworm.com/index.php?rid=1406042&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438559%26dopt%3DAbstract In conclusion, AH Plus sealer presented greater adhesion to dentin than Epiphany, regardless of the treatment of root canal walls. PMID: 18438559 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406042 Tue, 29 Apr 2008 19:23:57 +0100 1406042 http://www.medworm.com/index.php?rid=1406041&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438560%26dopt%3DAbstract In conclusion, the effect of the addition of an intermediate flowable composite layer on muTBS to dentin was material-dependent and resulted in an increased adhesion for all tested materials, though with significance only for Clearfil SE Bond. PMID: 18438560 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406041 Tue, 29 Apr 2008 19:23:57 +0100 1406041 http://www.medworm.com/index.php?rid=1406040&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438561%26dopt%3DAbstract Authors: Sasaki LH, Lobo PD, Moriyama Y, Watanabe IS, Villaverde AB, Tanaka CS, Moriyama EH, Brugnera A Er:YAG laser has been studied as a potential tool for restorative dentistry due to its ability to selectively remove oral hard tissue with minimal or no thermal damage to the surrounding tissues. The purpose of this study was to evaluate in vitro the tensile bond strength (TBS) of an adhesive/composite resin system to human enamel surfaces treated with 37% phosphoric acid, Er:YAG laser (lambda=2.94 mum) with a total energy of 16 J (80 mJ/pulse, 2Hz, 200 pulses, 250 ms pulse width), and Er:YAG laser followed by phosphoric acid etching. Analysis of the treated surfaces was performed by scanning electron microscopy (SEM) to assess morphological differences among the groups. TBS means (i... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406040 Tue, 29 Apr 2008 19:23:57 +0100 1406040 http://www.medworm.com/index.php?rid=1406039&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438562%26dopt%3DAbstract This study evaluated the influence of defined pressure application before light-curing on the tensile bond strength (TBS) of two adhesive systems to wet and perfused dentin. Bonding sites were analyzed by scanning electron microscopy (SEM) to assess morphological changes. Dentin discs from 120 human third molars were prepared in such a way to allow simulation of intrapulpal pressure. The specimens were randomly assigned to 6 groups (n=20) according to different experimental conditions. The adhesive systems (ScotchbondTM Multi-Purpose and Syntac(R)) were applied either to wet or perfused dentin. In the latter, compression was applied before adhesive light-curing . TBS was recorded using an universal testing machine. Qualitative examination of the bonding sites was performed by SEM after dis... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406039 Tue, 29 Apr 2008 19:23:57 +0100 1406039 http://www.medworm.com/index.php?rid=1406038&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438563%26dopt%3DAbstract In conclusion, soft drink exposure caused a significant decrease in nanohardness and elastic modulus. The pH of the soft drink was more acidic from 5 masculineC to 37 masculineC. Orange juice showed a similar trend but, surprisingly, it had less effect on hardness, elastic modulus and roughness of enamel than the carbonated drink. PMID: 18438563 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406038 Tue, 29 Apr 2008 19:23:57 +0100 1406038 http://www.medworm.com/index.php?rid=1406037&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438564%26dopt%3DAbstract Authors: Boraks G, Tampelini FS, Pereira KF, Chopard RP A common side effect of radiotherapy used in the treatment of oral cancer is the occurrence of structural and physiological alterations of the salivary glands due to exposure to ionizing radiation, as demonstrated by conditions such as decreased salivary flow. The present study evaluated ultrastructural alterations in the parotid glands of rats receiving a fractionated dose (1,500-cGy) of radiation emitted by a Cesium-137 source and rats that were not subjected to ionizing radiation. After sacrifice, the parotid glands were removed and examined by transmission electron microscopy. Damage such as cytoplasmic vacuolization, dilatation of the endoplasmic reticulum and destruction of mitochondria, as well as damage to the cellular mem... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406037 Tue, 29 Apr 2008 19:23:57 +0100 1406037 http://www.medworm.com/index.php?rid=1406036&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438565%26dopt%3DAbstract This study quantified by, electrovibratography, the amount of mandible protrusion required to decrease significantly temporomandibular joint (TMJ) vibratory energy as an aid in the diagnosis of the recapture of anteriorly displaced disk. Eighteen patients diagnosed as having anterior disk displacement with reduction and TMJ clicking were submitted to electrovibratographic examination at the first appointment and treated with a stabilizing appliance and anterior positioning appliance with 1 to 5 mm protrusion. Vibratory energy was checked in each of these positions. Baseline data were used as control. At the first appointment, the patients had vibrations with more elevated intensities at the middle and late phases of the mouth opening cycle. At only one clinical step, mandible protrusion wa... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406036 Tue, 29 Apr 2008 19:23:57 +0100 1406036 http://www.medworm.com/index.php?rid=1406035&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D18438566%26dopt%3DAbstract Authors: Medina W, Hurtig AK, San Sebastián M, Quizhpe E, Romero C The purpose of this study was to evaluate the caries experience among 6-12-year-old indigenous (Naporunas) and non-indigenous (recent settlers of mixed ethnic origin) schoolchildren, living in the Amazon basin of Ecuador. Cross-sectional data were obtained from 1,449 clinical exams according to the World Health Organization criteria. Nine (7.6%) indigenous and 3 (4.5%) non-indigenous children had no caries experience in their primary dentition at the age of 6. The mean dmft value (SD) among indigenous and non-indigenous children aged 6 was 6.40 (3.36) and 8.36 (3.93), respectively. Sixty-four (54.2%) indigenous and 29 (43.3%) non-indigenous children had no caries experience in their permanent first molars at the ag... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1406035 Tue, 29 Apr 2008 19:23:57 +0100 1406035 http://www.medworm.com/index.php?rid=1008429&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982545%26dopt%3DAbstract Authors: Teófilo LT, Leles CR Studies on self-perception have demonstrated that tooth loss is associated with esthetic, functional, psychological and social impacts for individuals. However, not all subjects seek treatment immediately after tooth loss, even when desire for replacement is strongly expressed. The aim of this study was to evaluate the perception of patients submitted to tooth extraction about factors associated with tooth loss and prosthodontic treatment, at the time and after extraction. A convenience sample of 211 consecutive patients were clinically evaluated and answered to a questionnaire about perceived impacts and prosthodontic treatment needs. Data were collected at the time of extraction and after a 3-month time interval. Perceived impacts were high (21 to 7... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008429 Wed, 07 Nov 2007 00:49:24 +0100 1008429 http://www.medworm.com/index.php?rid=1008428&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982546%26dopt%3DAbstract Authors: Maniglia-Ferreira C, Valverde GB, Silva JB, Paula RC, Feitosa JP, Souza-Filho FJ This in vivo study investigated the time of degradation of root filling material (trans 1,4-polyisoprene) retrieved from endodontically treated teeth and correlated the occurrence of degradation with the longevity of endodontics. Thirty-six root-filled teeth with different filling times (2 to 30 years) and with and without periapical lesions were selected. All teeth presented clinical indication for root canal retreatment. The association among filling time, presence of periapical lesion and root filling material degradation was investigated. Root filling samples were retrieved from the root canals using a Hedströ m file without solvent. The trans 1,4-polyisoprene was isolated by root filling... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008428 Wed, 07 Nov 2007 00:49:24 +0100 1008428 http://www.medworm.com/index.php?rid=1008427&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982547%26dopt%3DAbstract Authors: Ibelli GS, Barroso JM, Capelli A, Spanó JC, Pécora JD The purpose of this study was to investigate the influence of cervical preflaring on determination of the initial apical file in maxillary lateral incisors. Forty human lateral incisors with complete root formation were used. After standard access cavities, a size 06 K-file was inserted into each canal until the apical foramen was reached. The WL (WL) was set 1 mm short of the apical foramen. Four groups (n=10) were formed at random, according to the type of cervical preflaring performed. Group 1 received the initial apical instrument without previous preflaring of the cervical and middle root canal thirds. Group 2 had the cervical and middle root canal thirds enlarged with nickel-titanium Orifice Opener instrumen... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008427 Wed, 07 Nov 2007 00:49:24 +0100 1008427 http://www.medworm.com/index.php?rid=1008426&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982548%26dopt%3DAbstract This study evaluated the bond strength (push-out method) and Knoop hardness of Z250 composite resin, photoactivated with XL 2500 curing unit, using different protocols: continuous mode (700mW/cm(2) for 20s) (CO); soft-start (50 mW/cm(2) for 5 s, followed by 700 mW/cm(2) for 15 s) (SS1); soft-start (100 mW/cm(2) for 5 s, followed by 700 mW/cm(2) for 15 s) (SS2); soft-start (150 mW/cm(2) for 5 s, followed by 700mW/cm(2) for 15s) (SS3); soft-start (200mW/cm(2) for 5s, followed by 700mW/cm(2) for 15s) (SS4); soft-start (250mW/cm(2) for 5 s, followed by 700 mW/cm(2) for 15 s) (SS5); soft-start (300 mW/cm(2) for 5 s, followed by 700 mW/cm(2) for 15 s) (SS6). For the push-out test, the specimens were tested in a universal testing machine at a crosshead speed of 0.5 mm/min. For the hardness test, ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008426 Wed, 07 Nov 2007 00:49:24 +0100 1008426 http://www.medworm.com/index.php?rid=1008425&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982549%26dopt%3DAbstract In conclusion, the self-etching primer systems had a performance comparable to that of the total-etch adhesive system. PMID: 17982549 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008425 Wed, 07 Nov 2007 00:49:24 +0100 1008425 http://www.medworm.com/index.php?rid=1008424&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982550%26dopt%3DAbstract Authors: Pires-de-Souza Fde C, Garcia Lda F, Hamida HM, Casemiro LA The purpose of this study was to evaluate, in vitro, the color stability of three composite resins of two different shades (A3 and C3) cured with either a quartz tungsten halogen (QTH) or a light emitting diode (LED) source. Forty specimens (20 x 2 mm) were prepared for each composite (Tetric Ceram(R), Heliomolar(R) and Esthet-X(R)), being 20 for each shade. In each group, 10 specimens were light-cured using the QTH unit and 10 with the LED source. The shade of the materials was evaluated before and after submitting the specimens to artificial accelerated aging (4 h UV-B/4 h condensing vapor), using a reflection spectrophotometer. deltaE means were calculated and analyzed statistically by 2-way ANOVA and Tukey's test a... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008424 Wed, 07 Nov 2007 00:49:24 +0100 1008424 http://www.medworm.com/index.php?rid=1008423&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982551%26dopt%3DAbstract In conclusion, among the tested materials, Clearfil Liner Bond 2V self-etching primer adhesive syetem had the best performance. The substrate type influenced bond strength, being higher to enamel. PMID: 17982551 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008423 Wed, 07 Nov 2007 00:49:24 +0100 1008423 http://www.medworm.com/index.php?rid=1008422&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982552%26dopt%3DAbstract This study evaluated the morphological and chemical composition of the following bone substitutes: cancellous and cortical organic bovine bone with macro and microparticle size ranging from 1.0 to 2.0 mm and 0.25 to 1.0 mm, respectively; inorganic bovine bone with particle size ranging from 0.25 to 1.0 mm; hydroxyapatite with particle size ranging from 0.75 to 1.0 mm; and demineralized freeze-dried bone allograft with particle size ranging from 0.25 to 0.5 mm. The samples were sputter-coated with gold in an ion coater, the morphology was observed and particle size was measured under vacuum by scanning electron microscopy (SEM). The chemical composition was evaluated by spectroscopy of dispersion energy (EDS) microanalysis using samples without coating. SEM analysis provided visual evidence... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008422 Wed, 07 Nov 2007 00:49:24 +0100 1008422 http://www.medworm.com/index.php?rid=1008421&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982553%26dopt%3DAbstract This study evaluated, in vitro, the loss of tooth substance after cavity preparation for direct and indirect restorations and its relationship with fracture strength of the prepared teeth. Sixty sound human maxillary first premolars were assigned to 6 groups (n=10). MOD direct composite cavities (Groups I, II and III) and indirect inlay cavities (Groups IV, V and VI) were prepared maintaining standardized dimensions: 2-mm deep pulpal floors, 1.5-mm wide gingival walls and 2-mm high axial walls. Buccolingual width of the occlusal box was established at 1/4 (Groups I and IV), 1/3 (Groups II and V) or 1/2 (Groups III and VI) of the intercuspal distance. Teeth were weighed (digital balance accurate to 0.001 g) before and after preparation to record tooth substance mass lost during cavity prepa... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008421 Wed, 07 Nov 2007 00:49:24 +0100 1008421 http://www.medworm.com/index.php?rid=1008420&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982554%26dopt%3DAbstract Authors: Barbosa GA, Simamoto Júnior PC, Fernandes Neto AJ, Mattos Mda G, Neves FD An inadequate fit at the abutment/implant interface can generate mechanical and biological problems. The laboratorial stages could induce misfit in such interface when the castable UCLA abutment type is used. The purpose of this study was to comparatively evaluate the performance of three prosthetic laboratories (Labs A, B and C) by vertical fit analysis of castable UCLA abutments on the casting and soldering stages of the same prosthesis. Four fixed prostheses were built by each laboratory using castable UCLA abutments. The evaluation was made by scanning electron microscopy under 500x magnification in the mesial and distal regions of each element of the prosthesis, totalizing 24 measurements per l... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008420 Wed, 07 Nov 2007 00:49:24 +0100 1008420 http://www.medworm.com/index.php?rid=1008419&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982555%26dopt%3DAbstract Authors: Lautenschläger Gde A, Gallina MC, Ferreira Júnior O, Lara VS Primary failure of eruption represents a cessation of tooth eruption before emergence not due to a physical barrier or abnormal position and has no systemic cause. This failure of tooth eruption is rare phenomenon and it has not been associated with alterations of dental follicle. This case report describes a permanent right first molar with primary failure of eruption at the inferior border of the mandible presenting microscopic, clinical and radiographic findings compatible with follicular cystic lesion. The follicular tissues of this molar showed microscopic aspects of inflammation. Thus, pericoronal tissues surrounding long-term unerupted teeth with primary failure of eruption has potential to develop i... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008419 Wed, 07 Nov 2007 00:49:24 +0100 1008419 http://www.medworm.com/index.php?rid=1008418&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982556%26dopt%3DAbstract Authors: Aidar M, Line SR Buccal cells provide a convenient source of DNA for epidemiological studies. The goal of this study was to develop a convenient method to obtain buccal cells from mouthwash samples to be used as a source of DNA, and to evaluate the stability of the DNA in mouthwash solution over time. The procedures used in the method described in this paper avoid the use of any organic solvents. This is achieved by salting out the cellular proteins by dehydration and precipitation with a saturated ammonium acetate solution. The protocol described here is fast, simple to perform, sensitive, economical and several samples can be processed at the same time. The analyses provide consistent evidence that DNA extracted by this methodology is sufficient for several PCR amplification... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008418 Wed, 07 Nov 2007 00:49:24 +0100 1008418 http://www.medworm.com/index.php?rid=1008417&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982557%26dopt%3DAbstract Authors: Pitol DL, Caetano FH, Lunardi LO Bone decalcification is a time-consuming process. It takes weeks and preservation of the tissue structure depends on the quality and velocity of the demineralization process. In the present study, a decalcification methodology was adapted using microwaving to accelerate the decalcification of rat bone for electron microscopic analysis. The ultrastructure of the bone decalcified by microwave energy was observed. Wistar rats were perfused with paraformaldehyde and maxillary segments were removed and fixed in glutaraldehyde. Half of specimens were decalcified by conventional treatment with immersion in Warshawsky solution at 4 masculineC during 45 days, and the other half of specimens were placed into the beaker with 20 mL of the Warshawsky soluti... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008417 Wed, 07 Nov 2007 00:49:24 +0100 1008417 http://www.medworm.com/index.php?rid=1008416&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982558%26dopt%3DAbstract Authors: Tavares MG, Machado AP, Motta BG, Borsatto MC, Rosa AL, Xavier SP The aim of this study was to evaluate the efficacy of electro-acupuncture (EAC) on postoperative pain control after mandibular third molar surgery. Twenty four young patients (12 male and 12 female) with symmetrically impacted mandibular third molars were selected. Each patient was submitted to two separate surgical procedures under local anesthesia. At one side, extraction was carried out employing both prior (24h) and immediately postoperative application of EAC, while on the contralateral side surgery was carried out without any treatment. EAC was applied on 6 bilateral systemic and 2 auricular points with a WQ10Dl appliance using 40-60Hz frequency for 20 min and individually adjusted intensity. Postoperative... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008416 Wed, 07 Nov 2007 00:49:24 +0100 1008416 http://www.medworm.com/index.php?rid=1008415&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982559%26dopt%3DAbstract In conclusion, clinical signs and symptoms of TMD can occur in young population and this information is of great importance for the early diagnosis of the dysfunction. PMID: 17982559 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008415 Wed, 07 Nov 2007 00:49:24 +0100 1008415 http://www.medworm.com/index.php?rid=1008414&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982560%26dopt%3DAbstract Authors: Oliveira DM, Vasconcellos RJ, Laureano Filho JR, Cypriano RV A rare case of fracture of the coronoid and the pterygoid process caused by firearms is described. A 28-year-old male was hit by a bullet in the face, resulting in restricted mouth opening, difficulty in chewing and pain when opening the mouth. Clinical examination revealed a perforating wound in the right parotid region and a similar wound on the left side of the same region. A CT scan showed comminuted fracture of the left coronoid process and bilateral comminuted fracture of the pterygoid processes. Treatment was conservative, speech therapy was conducted and it was successful. Details of the clinical signs, radiology (3D-CT scan), treatment and follow-up are presented. PMID: 17982560 [PubMed - in process] (So... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008414 Wed, 07 Nov 2007 00:49:24 +0100 1008414 http://www.medworm.com/index.php?rid=1008413&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17982561%26dopt%3DAbstract Authors: Mazzetto MO, Hotta TH This paper reports the case of a patient who presented limited buccal opening, though, without apparent symptomatology. The patient was partially toothless and exodontia of the remaining teeth was indicated. Clinical examination and clinical interview were performed as well as panoramic radiograph, transcranial radiograph of the temporomandibular joints (TMJ) and, later, computed tomography (CT), emphasizing the importance of complementary exams in the diagnostic phase. Analysis of the CT scan confirmed the structural alteration in the condylar and coronoid processes of the jaw, explaining the limited buccal opening. The remaining teeth were extracted and complete upper and lower dentures were fabricated, reestablishing the occlusal relationship and the p... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=1008413 Wed, 07 Nov 2007 00:49:24 +0100 1008413 http://www.medworm.com/index.php?rid=746170&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639191%26dopt%3DAbstract Authors: PMID: 17639191 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746170 Fri, 20 Jul 2007 23:56:44 +0100 746170 http://www.medworm.com/index.php?rid=746169&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639192%26dopt%3DAbstract In conclusion, the tested cements have similar components, which supports, as far as composition is concerned, the possible clinical use of Portland as an option to MTA. PMID: 17639192 [PubMed - as supplied by publisher] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746169 Fri, 20 Jul 2007 23:56:44 +0100 746169 http://www.medworm.com/index.php?rid=746168&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639193%26dopt%3DAbstract In conclusion, regardless of the vehicle and antiseptic, all Ca(OH)2-based pastes showed different degrees of measurable residual antibacterial activity. Furthermore, unlike CMCP, chlorhexidine increased significantly the antibacterial activity of Ca(OH)2. PMID: 17639193 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746168 Fri, 20 Jul 2007 23:56:44 +0100 746168 http://www.medworm.com/index.php?rid=746167&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639194%26dopt%3DAbstract Authors: Leonardi LE, Atlas DM, Raiden G The aim of the present study was to assess the presence of apically extruded debris and evaluate the influence of canal curvature on the amount of debris produced by manual and mechanical techniques. Forty single-rooted mature teeth with 15 to 30 degree of root canal curvature were selected. The presence of only one foramen was confirmed using a magnifying lens. A size 15 K-file was placed up to the apical foramen to determine the patency. Working length was determined with the same instrument, 1 mm short of the foramen. According to the employed technique, the groups were labeled as follows: Group 1 - Manual instrumentation with Mor-flex files; Group 2 - Mechanical instrumentation with Cursor and Mor-flex files; Group 3 - Manual instrumentation... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746167 Fri, 20 Jul 2007 23:56:44 +0100 746167 http://www.medworm.com/index.php?rid=746166&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639195%26dopt%3DAbstract Authors: Barbizam JV, Souza M, Cecchin D, Dabbel J The purpose of this in vitro study was to evaluate the ability of a silicon-based root canal sealer, compared to zinc oxide and eugenol and an epoxy resin-based sealers, for filling of simulated lateral canals. Thirty extracted single-rooted human teeth were selected, conventional access was made and the working length was established 1 mm from the apical foramen. Three simulated lateral canals, one in each root third (coronal, middle and apical) were prepared in both the mesial and distal surfaces of each tooth using a size 15 reamer adapted to a low-speed handpiece. Each root canal was instrumented using ProTaper rotary files up to file F3 at the working length, and then irrigated with 2.5% NaOCl followed by EDTA. The teeth were assi... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746166 Fri, 20 Jul 2007 23:56:44 +0100 746166 http://www.medworm.com/index.php?rid=746165&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639196%26dopt%3DAbstract Authors: Spolidorio LC, Spolidorio DM, Holzhausen M, Nassar CA, Nassar PO Cyclosporin A (CsA) is a potent immunosuppressor used in organ transplantation and in the management of various autoimmune diseases. Recent studies have shown that CsA stimulates deposition of cementum on root surfaces. The aim of this study was to evaluate the periapical cementum thickness and the apical foramen width in CsA-treated rats. Rats weighing 50 g were treated with a daily injection of 10 mg/kg body weight of CsA in the chow for 60 days. The cementum of the mandibular 1st molars was histologically and morphometricaly examined by analysis of 5-microm-thick serial buccolingual paraffin sections stained with hematoxylin and eosin. Histometric and stereologic analyses revealed the presence of large amounts... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746165 Fri, 20 Jul 2007 23:56:44 +0100 746165 http://www.medworm.com/index.php?rid=746164&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639197%26dopt%3DAbstract Authors: Calixto RF, Teófilo JM, Brentegani LG, Lamano-Carvalho TL The capacity of a commercially available pool of bovine bone morphogenetic proteins (BMPs) to stimulate osteogenesis in the rat alveolar healing was investigated by histometric analysis. Male rats were anesthetized and had their upper incisor extracted. A pool of purified bovine BMPs adsorbed to microgranular resorbable hydroxyapatite was agglutinated with bovine collagen and saline before implantation into the alveolar socket. The implanted and control rats (n=30 per group) were sacrificed 1 to 9 weeks postoperatively, the hemi-maxillae were decalcified, processed for paraffin embedding and semi-serial longitudinal sections were obtained and stained with hematoxylin and eosin. The volume fraction of alveolar healing c... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746164 Fri, 20 Jul 2007 23:56:44 +0100 746164 http://www.medworm.com/index.php?rid=746163&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639198%26dopt%3DAbstract This study evaluated pulp changes in molars of rats submitted to tooth movement by application of a 0.4 N force. Twenty-five adult male Wistar rats (Rattus norvegicus, albinus) were randomly assigned to 5 groups (n=5), being one control group not submitted to force application, and four study groups of 6, 12, 24 and 72 h of force application. The study groups received a 5-mm long nickel-titanium closed coil spring, placed from the right maxillary first molar to the maxillary incisors of each animal. The coil spring was used for mesial inclination of the first molar. After the specific period of tooth movement of each study group, the animals were sacrificed and specimens containing the teeth submitted to movement were processed and stained with hematoxylin and eosin for histological analys... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746163 Fri, 20 Jul 2007 23:56:44 +0100 746163 http://www.medworm.com/index.php?rid=746162&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639199%26dopt%3DAbstract Authors: Unterkircher CS, Leão MV, Carvalho YR Sjögren's syndrome is an autoimmune disease characterized by sialoadenitis and elevated titers of autoantibodies. To assess whether it is possible to induce inflammatory changes in salivary gland tissues, a series of immunizations in Balb/c mice have been undertaken, using salivary gland extract, modified or not, added to several adjuvants. Mice's humoral immune response to salivary gland antigens was monitored by ELISA. Inflammatory cells infiltrating gland tissue were seen 3 months after immunization with salivary gland extract modified with pepsin (AgGp) and metaperiodate (AgGMp). Although pathological progression was not observed, the histopathological picture was similar to the initial phase of Sjögren's syndrome. In addition, a mo... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746162 Fri, 20 Jul 2007 23:56:44 +0100 746162 http://www.medworm.com/index.php?rid=746161&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639200%26dopt%3DAbstract This study evaluated the efficiency of air abrasion alone and associated with phosphoric acid etching on tensile bond strength of a single-bottle adhesive/indirect composite restorative system (Bond 1/Alert) to human enamel. Forty enamel surfaces from extracted human third molars were assigned to 4 groups (n= 10). Mach 4.1 (Kreativ Inc.) air abrasion equipment was used for 20 s. A special system of rod pairs aligned in a specific apparatus was used for tensile strength tests, according to ISO/TR 11405 standard (1994) with some modifications. Bond strength means were: G1 (air abrasion + rinsing + condensable composite resin Alert) = 3.46 +/- 0.83 MPa; G2 (air abrasion + rinsing + Bond 1 adhesive system + Alert) = 4.00 +/- 1.60 MPa; G3 (air abrasion + rinsing + 37% phosphoric acid + rinsing ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746161 Fri, 20 Jul 2007 23:56:44 +0100 746161 http://www.medworm.com/index.php?rid=746160&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639201%26dopt%3DAbstract Authors: Gontijo L, Cruz Rde A, Brandão PR Poor oral hygiene has been considered one of the main problems routinely faced in the orthodontic treatment. Orthodontic appliance creates an environment that provides mineral loss from the dental enamel. Such condition is clinically seen as white spot lesions and cavitations in the most severe cases. The aim of this study was to evaluate the effects of a fluoride varnish application as a caries prevention method for clinical orthodontics. The experiment analyzed dental enamel adjacent to orthodontics accessories after treatment. In addition, it was observed the calcium, phosphorus and fluoride contents on enamel treated with a fluoride varnish. The results showed that fluoride varnish application is a simple and fast technique that could be ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746160 Fri, 20 Jul 2007 23:56:44 +0100 746160 http://www.medworm.com/index.php?rid=746159&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639202%26dopt%3DAbstract This study evaluated the effect of blue light emitting diode (LED) and quartz tungsten halogen (QTH) on the degree of conversion (DC) of an etch-and-rinse Single Bond adhesive system (SB) and a mixture composed of primer solution and resin bond from Clearfil SE Bond self-etching adhesive system (CB) using Fourier transform infrared analysis (FTIR). Adhesives were applied to potassium bromide pellet surfaces and FTIR analyses were performed before and after photo-activation for 10 s with either LED (Freelight 1 - 400 mw/cm(2)) or QTH (XL 3000 - 630 mw/cm(2)) light-curing units (n=8). Additional FTIR spectra were obtained from photo-activated samples stored in distilled water for 1 week. The DC was calculated by comparing the spectra obtained from adhesive resins before and after photo-activ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746159 Fri, 20 Jul 2007 23:56:44 +0100 746159 http://www.medworm.com/index.php?rid=746158&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639203%26dopt%3DAbstract In conclusion, there was an inverse correlation between surface hardness and wear resistance for both Artglass and Solidex indirect composites, that is the higher the hardness, the lower the wear. PMID: 17639203 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746158 Fri, 20 Jul 2007 23:56:44 +0100 746158 http://www.medworm.com/index.php?rid=746157&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639204%26dopt%3DAbstract Authors: Pereira-Cenci T, Pereira LJ, Cenci MS, Bonachela WC, Del Bel Cury AA Individuals with temporomandibular disorders (TMD) are expected to have decreased maximum bite forces (MBF). This way, this study compared the MBF in subjects with TMD to a control group and also evaluated its association with age, gender, height and weight. Forty healthy adults with complete natural dentition divided into four groups according to gender and presence or absence of TMD signs/symptoms (based on the Research Diagnostic Criteria RDC) underwent a MBF test with a gnathodynamometer in molar and incisal areas. Statistical analysis was performed by ANOVA and Student-Newman-Keuls test (p=0.05), and the relationship between age, gender, weight, height and MBF was verified by Pearson's correlation test. ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746157 Fri, 20 Jul 2007 23:56:44 +0100 746157 http://www.medworm.com/index.php?rid=746156&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639205%26dopt%3DAbstract In this study, 33.3% of the subjects had the innervation of one or both maxillary central incisors derived from the nasopalatine nerve, whilst most subjects (66.7%) had such teeth innervated by the anterior superior alveolar nerve. The nasopalatine nerve block was effective in anesthetizing the maxillary central incisors when the anterior superior alveolar nerve block failed. PMID: 17639205 [PubMed - as supplied by publisher] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746156 Fri, 20 Jul 2007 23:56:44 +0100 746156 http://www.medworm.com/index.php?rid=746155&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639206%26dopt%3DAbstract Authors: Sales MA, Oliveira JX, Cavalcanti MG Bifid mandibular condyle is an uncommon entity described in the literature as having a controversial etiology. Despite the absence of clinical symptomatology, the radiologist must be aware and should have some knowledge of this abnormality, as well its implications regarding functional and morphological changes. TMJ ankylosis is a disabling disease with involvement of the mandibular condyle, articular fossa and base of the skull. The association of bifid condyle with temporomandibular joint ankylosis is rare and must be carefully evaluated. The purpose of this paper is to report a case of simultaneous bifid mandibular condyle and temporomandibular joint ankylosis and to describe its computed tomography imaging findings. PMID: 17639206 [... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746155 Fri, 20 Jul 2007 23:56:44 +0100 746155 http://www.medworm.com/index.php?rid=746154&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639207%26dopt%3DAbstract Authors: Oltramari PV, Conti AC, Navarro Rde L, Almeida MR, Almeida-Pedrin RR, Ferreira FP The purpose of this study was to address the therapeutic goals regarding the static and functional occlusion in the completion of orthodontic treatment. For such purpose, a study population comprising 20 female treated Class II malocclusion subjects with an initial mean age of 11 years underwent a two-phase treatment (orthopedics and orthodontics). The patients were diagnosed in centric relation and were treated according to the six keys for normal occlusion and functional occlusal parameters (centric relation, vertical dimension, lateral and anterior guidances, occlusal contacts and direction of forces applied on the teeth). After removal of fixed mechanics, retainers were installed and maintain... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746154 Fri, 20 Jul 2007 23:56:44 +0100 746154 http://www.medworm.com/index.php?rid=746153&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17639208%26dopt%3DAbstract Authors: Pekkan G, Hekimoglu C, Sahin N Anterior edentulous areas usually display unusual soft tissue configurations and compromised bone support in patients with marginal mandibulectomy. There are several treatment modalities for these patients. A removable partial denture may be the treatment of choice. Maximum stability of the partial denture base for mandibulectomy patients may be accomplished by the application of the neutral zone concept, which helps providing stability to the base. This case report describes the fabrication of a removable partial denture for a patient with marginal mandibulectomy using a modified neutral zone technique. PMID: 17639208 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=746153 Fri, 20 Jul 2007 23:56:44 +0100 746153 http://www.medworm.com/index.php?rid=395304&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D17262127%26dopt%3DAbstract Efficacy of Carisolv™ as an adjunctive therapy to scaling and root planing on subgingival calculus removal. Braz Dent J. 2006 00;17(3):213-218 Authors: Grisi DC, Salvador SL, Marcantonio RA The purpose of this study was to evaluate the effectiveness of subgingival application of Carisolv™ gel as an adjunctive therapy to scaling and root planing (SRP) on calculus removal compared to conventional instrumentation. Forty-five teeth requiring extraction due to severe periodontal disease were randomized to the following treatments: 1) SRP alone; 2) placebo gel + SRP; 3) Carisolv™ gel + SRP. Either test or placebo gel was applied subgingivally for 1 min and then the root were instrumented until a smooth and calculus-free surface was achieved. Instrumentat... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=395304 Sat, 03 Feb 2007 06:05:02 +0100 395304 http://www.medworm.com/index.php?rid=200768&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16981310%26dopt%3DAbstract In conclusion, rinsing and expectoration after brushing had no influence on the dose of fluoride to which children were exposed by use of the dentifrices. However, expectoration was directly associated to the fluoride dose when the children's dentifrice was used. PMID: 16981310 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=200768 Fri, 22 Sep 2006 01:46:02 +0100 200768 http://www.medworm.com/index.php?rid=197999&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924336%26dopt%3DAbstract Authors: Grisi DC, Theodoro LH, Sampaio JE, Grisi MF, Salvador SL The aim of this study was to analyze, under scanning electron microscopy (SEM), the morphologic characteristics of root surfaces after application of Carisolv gel in association with scaling and root planing (SRP). Sixty periodontally compromised extracted human teeth were randomly assigned to 6 groups: 1) SRP alone; 2) passive topical application of Carisolv + SRP; 3) active topical application of Carisolv + SRP; 4) multiple applications of Carisolv + SRP; 5) SRP + 24% EDTA; 6) topical application of Carisolv + SRP + 24% EDTA. Carisolv gel was applied to root surfaces for 30 s, followed by scaling and root planing, consisting of 50 strokes with Gracey curettes in an apical-coronal direction, parallel to the long axis of... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=197999 Wed, 20 Sep 2006 12:58:11 +0100 197999 http://www.medworm.com/index.php?rid=154283&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924333%26dopt%3DAbstract In this study, the potential DNA damage associated with exposure to fluoride was assessed by the single cell gel (comet) assay in vitro. Mouse lymphoma and human fibroblast cells were exposed to sodium fluoride (NaF) at final concentration ranging from 7 to 100 microg/mL for 3 h at 37 masculineC. The results pointed out that NaF in all tested concentrations did not contribute to DNA damage as depicted by the mean tail moment and tail intensity for both cellular types assessed. These findings are clinically important because they represent a valuable contribution for evaluation of the potential health risk associated with exposure to agents usually used in dental practice. PMID: 16924333 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154283 Wed, 23 Aug 2006 21:08:02 +0100 154283 http://www.medworm.com/index.php?rid=154282&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924334%26dopt%3DAbstract This study presents a new method in which a capsule of a synthetic material using fuchsine-containing granules was devised. Such capsules were submitted to several laboratory tests in order to determine their resistance and absorbency. Ten calibrated individuals were instructed to chew the capsules. Masticatory efficiency was determined by analyzing fuchsine concentration in a solution obtained from chewed granules measuring the absorbance at 546 nm. The method was found to be fast, simple, reproducible, inexpensive and efficient and can be used as a complementary evaluation of the masticatory efficiency in different situations. PMID: 16924334 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154282 Wed, 23 Aug 2006 21:08:02 +0100 154282 http://www.medworm.com/index.php?rid=154281&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924335%26dopt%3DAbstract In conclusion, from the tested glass ionomer cements, Fuji IX, Ketac Molar and Vidrion R presented acceptable surface roughness after setting reaction while Vitromolar showed remarkably higher surface roughness. PMID: 16924335 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154281 Wed, 23 Aug 2006 21:08:02 +0100 154281 http://www.medworm.com/index.php?rid=154280&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924336%26dopt%3DAbstract Authors: Grisi DC, Theodoro LH, Sampaio JE, Grisi MF, Salvador SL The aim of this study was to analyze, under scanning electron microscopy (SEM), the morphologic characteristics of root surfaces after application of CarisolvTM gel in association with scaling and root planing (SRP). Sixty periodontally compromised extracted human teeth were randomly assigned to 6 groups: 1) SRP alone; 2) passive topical application of CarisolvTM + SRP; 3) active topical application of CarisolvTM + SRP; 4) multiple applications of CarisolvTM + SRP; 5) SRP + 24% EDTA; 6) topical application of CarisolvTM + SRP + 24% EDTA. CarisolvTM gel was applied to root surfaces for 30 s, followed by scaling and root planing, consisting of 50 strokes with Gracey curettes in an apical-coronal direction, parallel to the ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154280 Wed, 23 Aug 2006 21:08:02 +0100 154280 http://www.medworm.com/index.php?rid=154279&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924337%26dopt%3DAbstract In conclusion, immersion for at least 5 min in a 0.2% peracetic acid-based disinfectant promoted high-level disinfection of heat-polymerized, chemically activated and microwave-polymerized acrylic resins contaminated with either human saliva or Bacillus subtilis or Bacillus stearothermophilus. PMID: 16924337 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154279 Wed, 23 Aug 2006 21:08:02 +0100 154279 http://www.medworm.com/index.php?rid=154278&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924338%26dopt%3DAbstract This study evaluated water sorption in heat-polymerized acrylic resins processed in monomaxillary flasks by water bath and in bimaxillary flasks by microwave energy and water bath. Fifty heat-polymerized acrylic resin specimens were fabricated according to the 12th specification of the American Dental Association and assigned to 3 groups: group 1 was processed by water bath in monomaxillary metallic flask; group 2 was processed by microwave energy in bimaxillary PVC flask; and group 3 was processed by water bath in bimaxillary metallic flask. Specimens were submitted to water sorption test, means were calculated and analyzed statistically by Student's t-test. Means (in g/cm(3)) were: group 1 - 0.024085, group 2 - 0.025312 and group 3 - 0.022098. Microwave energy processing and the amount o... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154278 Wed, 23 Aug 2006 21:08:02 +0100 154278 http://www.medworm.com/index.php?rid=154277&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924339%26dopt%3DAbstract Authors: Rocha SS, Adabo GL, Henriques GE, Nóbilo MA The purpose of this study was to evaluate the effect of heat treatments on the Vickers hardness of commercially pure titanium and Ti-6Al-4V castalloys. Six-millimeter-diameter cylindrical specimens were cast in a Rematitan System. Commercially pure titanium and Ti-6Al-4V alloy specimens were randomly assigned to 3 groups (n=10) that received the following heat treatments: control (no heat treatment); treatment 1 (T1): heating at 750 masculineC for 2 h; and treatment 2 (T2): annealing at 955 masculineC for 1 h and aging at 620 masculineC for 2 h. After heat treatments, the specimens were embedded in acrylic resin and their surface was ground and polished and hardness was measured. Vickers hardness means (VHN) and standard deviations ... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154277 Wed, 23 Aug 2006 21:08:02 +0100 154277 http://www.medworm.com/index.php?rid=154276&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924340%26dopt%3DAbstract In conclusion, the zinc-phosphate-based cement showed greater post retention than the resin-based cement. The findings of this study suggest that the eugenol-containing sealer interfered with the adhesive properties of the resin-based cement. PMID: 16924340 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154276 Wed, 23 Aug 2006 21:08:02 +0100 154276 http://www.medworm.com/index.php?rid=154275&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924341%26dopt%3DAbstract Authors: Estrela C, Estrela CR, Decurcio Dde A, Silva JA, Bammann LL The aim of this study was to evaluate the antimicrobial potential of ozone applied to 3 different solutions in an ultrasonic cleaning system against Staphylococcus aureus. A total of 120 mL of S. aureus were mixed in 6 L of the experimental solutions (sterilie distilled water, vinegar and sterile distilled water + Endozime AWpluz) used in a ultrasonic cleaning system (UCS). Ozone was produced by an electric discharge through a current of oxygen and bubbling with flow rate at 7g/h ozone (1.2%) into the microbial suspensions. Ten mL of each experimental suspension were collected and 5 fold dilutions were made in 9 mL of BHI and incubated at 37 degrees C for 48 h. Bacterial growth was evaluated by turbidity of the cultur... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154275 Wed, 23 Aug 2006 21:08:02 +0100 154275 http://www.medworm.com/index.php?rid=154274&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924342%26dopt%3DAbstract Authors: Bueno CE, Delboni MG, Araújo RA, Carrara HJ, Cunha RS The purpose of this study was to assess in vitro the efficacy of nickel-titanium K(3) rotary files and hand files for removal of gutta-percha and sealer from obturated root canals using either chloroform or chlorhexidine as solvents. Sixty extracted single-rooted bovine teeth with straight, large canals were prepared, obtured and randomly assigned to 3 groups (n=20). The teeth were stored at 37 masculineC for 1 month and then the gutta-percha and sealer were removed using different techniques, as follows. Group I: size 3 Gates-Glidden drills plus size 30 hand K-files and Hedström files and chloroform; Group II: K(3) NiTi rotary files and chloroform; and Group III: K(3) NiTi rotary files and 2% chlorhexidine gel. Radiograp... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154274 Wed, 23 Aug 2006 21:08:02 +0100 154274 http://www.medworm.com/index.php?rid=154273&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924343%26dopt%3DAbstract The objective of this study was to evaluate the bacterial profile in root canals of human primary teeth with necrotic pulp and periapical lesions using bacterial culture. A total of 20 primary teeth with necrotic pulp and radiographically visible radiolucent areas in the region of the bone furcation and/or the periapical region were selected. After crown access, 4 sterile absorbent paper points were introduced sequentially into the root canal for collection of material. After 30 s, the paper points were removed and placed in a test tube containing reduced transport fluid (RTF) and were sent for microbiological evaluation. Anaerobic microorganisms were found in 100% of the samples, black-pigmented bacilli in 30%, aerobic microorganisms in 60%, streptococci in 85%, Gram-negative aerobic rods... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154273 Wed, 23 Aug 2006 21:08:02 +0100 154273 http://www.medworm.com/index.php?rid=154272&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924344%26dopt%3DAbstract In conclusion, chemical depletion in automatic film processing was faster than in manual developing. In depleted chemicals, both types of films had an increase in latitude values and a decrease in speed and contrast. Insight was more resistant than Ektaspeed Plus to decrease in speed and latitude when processed using older chemicals, whereas contrast in Ektaspeed Plus was comparatively more stable. PMID: 16924344 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154272 Wed, 23 Aug 2006 21:08:02 +0100 154272 http://www.medworm.com/index.php?rid=154271&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924345%26dopt%3DAbstract This study evaluated the degree of buccolingual inclination of mandibular tooth crowns relative to torque. For such purpose, mandibular and maxillary stone casts from 31 Caucasian Brazilian adults with normal occlusion, pleasant facial aspect and no history of previous orthodontic treatment were examined. A custom device was developed for measuring the degree of inclination (torque) of bracket slots of orthodontic appliances relative to the occlusion plane, at three bonding height: standard (center of clinical crown), occlusal (0.5 mm occlusally from standard) and cervical (0.5 mm cervically from standard). Except for the mandibular incisors, which presented a small difference in torque from one another (lingual root torque for central incisors and buccal root torque for lateral incisors),... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154271 Wed, 23 Aug 2006 21:08:02 +0100 154271 http://www.medworm.com/index.php?rid=154270&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924346%26dopt%3DAbstract Authors: Salum FG, Martins GB, Figueiredo MA, Cherubini K, Yurgel LS, Torres-Pereira C Fanconi anemia (FA) is an autosomal recessive disorder that might cause a variety of congenital and developmental abnormalities. The most important features of FA are progressive bone marrow failure and development of malignancies, particularly acute myeloid leukemia and solid tumors. This paper reports the case of a 12-year-old patient with FA assisted at the Stomatology and Bucomaxillofacial Cancer Prevention Service of São Lucas Hospital, Brazil, who had been submitted to bone marrow transplantation (BMT) at the age of 5 and exhibited oral lesions characteristic of chronic graft versus host disease (GVHD). The patient was treated and followed-up for the oral lesions. Eleven years after the BMT, h... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154270 Wed, 23 Aug 2006 21:08:02 +0100 154270 http://www.medworm.com/index.php?rid=154269&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924347%26dopt%3DAbstract Authors: Hamid MJ, Dummer CD, Pinto LS Chronic renal failure is a relatively common systemic disease. Systemic abnormalities such as anemia, platelet disorders and hypertension as well as oral manifestations including xerostomia, uremic stomatitis, periodontal disease and maxillary and mandibular radiographic alterations can be observed in individuals with chronic renal disease. In view of its frequent occurrence and the need of knowledge by dentists dealing with this condition, this paper discusses the most important issues regarding chronic renal failure, addressing its systemic and oral manifestations and the dental management of chronic renal patients. A case report is presented. PMID: 16924347 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154269 Wed, 23 Aug 2006 21:08:02 +0100 154269 http://www.medworm.com/index.php?rid=154268&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16924348%26dopt%3DAbstract Authors: Deboni MC, Naclério-Homem Mda G, Pinto Junior DS, Traina AA, Cavalcanti MG The calcifying epithelial odontogenic tumor (CEOT) is a rare benign odontogenic neoplasm that accounts for approximately 1% of all odontogenic tumors. Its origin is controversial as well as its true malignant potential. A case of an advanced CEOT associated with an impacted right second molar in the mandible of a young black female patient is presented. Computed tomography imaging, radiographic and pathological findings, surgical patterns, gross anatomy of the lesion and the performed treatment are discussed. PMID: 16924348 [PubMed - in process] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=154268 Wed, 23 Aug 2006 21:08:02 +0100 154268 http://www.medworm.com/index.php?rid=107687&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16721455%26dopt%3DAbstract Authors: Pécora JD, Capelli A This paper makes a practical analysis about the paradigm on the instrumentation of curved root canals. In Endodontics, a paradigm has been created. Theories and techniques for instrumentation of curved root canals state that the use of a #25 file in the apical portion fulfills all the requirements for cleaning and shaping of the root canal system. Every scientific theory or paradigm should be continuously opened to modifications or refutation. The existence of extremely flexible instruments fabricated from metal alloys, methods for accurate determination of the real anatomic diameter and achievement of optimal shaping and cleaning of the apical portion created new theories and a new paradigm on the instrumentation of curved root canals. Therefore, this ne... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=107687 Tue, 18 Jul 2006 18:40:05 +0100 107687 http://www.medworm.com/index.php?rid=107686&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16721456%26dopt%3DAbstract Authors: Souza RA The apical limit of root canal instrumentation has always been a matter of great controversy. Despite the large number of published studies on this subject, a consensus has not yet been reached. In fact, the recent discussion on apical patency and cleaning of the apical foramen, as well as the incorporation of these procedures to the endodontic treatment, seem to have raised even more polemics. It is likely that all this polemics has its roots in the lack of interrelation between the theoretical knowledge of pulp stump and periapical tissues and the real clinical practice. By addressing the most important aspects of this theme, this paper aims to present news concepts about the importance of apical patency and cleaning of the apical foramen during root canal preparati... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=107686 Tue, 18 Jul 2006 18:40:05 +0100 107686 http://www.medworm.com/index.php?rid=107685&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16721457%26dopt%3DAbstract In conclusion, although the group prepared by a general dentist differed statistically from the other groups in terms of amount of dentin removal, this difference was clinically irrelevant. The NSK reciprocating handpiece powered by an electric engine was proved an effective auxiliary tool in root canal preparation, regardless of the operator's skills. PMID: 16721457 [PubMed - indexed for MEDLINE] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=107685 Tue, 18 Jul 2006 18:40:05 +0100 107685 http://www.medworm.com/index.php?rid=107684&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16721458%26dopt%3DAbstract Authors: Soares LE, Brugnera Junior A, Zanin F, Pacheco MT, Martin AA The aim of this study was to evaluate by dispersive Raman spectroscopy the mineral and organic components of human dentin before and after laser irradiation and acid etching. The occlusal enamel of six non-carious human third molars was removed providing 6 dentin discs, which were divided in four quadrants each of them receiving a different surface treatment: etching with a 37% phosphoric acid gel (control); irradiation by Er:YAG laser (KaVo Key Laser II) with 80 mJ, 3 Hz, 30 s (group I); 120 mJ, 3 Hz, 30 s (group II); and 180 mJ, 3 Hz, 30 s (group III). The Raman spectra of normal (untreated) and treated dentin were analyzed and the mineral and the organic component were evaluated. Results were submitted to statisti... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=107684 Tue, 18 Jul 2006 18:40:05 +0100 107684 http://www.medworm.com/index.php?rid=107683&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16721459%26dopt%3DAbstract In conclusion, TIG welding yielded higher flexural strength means than Nd:YAG laser welding for the tested Ti, Co-Cr and Ni-Cr alloys. PMID: 16721459 [PubMed - indexed for MEDLINE] (Source: Braz Dent J) Braz Dent J journals http://www.medworm.com/rss/comments.php?id=107683 Tue, 18 Jul 2006 18:40:05 +0100 107683 http://www.medworm.com/index.php?rid=107682&cid=s_28238_11_f&fid=28238&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D16721460%26dopt%3DAbstract This study evaluated the metal/porcelain bond strength of three ceramic systems (Vita VMK 88, Williams and Duceram) associated with three nickel-chromium alloys (Durabond, Lite Cast B and Resistal P) and one experimental cobalt-chromium-titanium alloy. Thirty cast cylinder specimens (15 mm in height; 6 mm in diameter) were obtained for each alloy, in away that 10 specimens of each alloy were tested with each porcelain. Bond strength was measured with an Emic screw-driven mechanical testing machine by applying parallel shear forces to the specimens until fracture. Kruskal-Wallis and Mann-Whitney U tests were used for statistical analysis of the alloy/ceramic combinations (p<0.05). Resistal P/Duceram had significantly higher bond strength (44.38+/-9.12 MPa) (p<0.05) than the other comb... Braz Dent J journals http://www.medworm.com/rss/comments.php?id=107682 Tue, 18 Jul 2006 18:40:05 +0100 107682