Aim of the study: the study aimed to determine the prevalence of dental midline shifting in a group of orthodontic patients. Methodology: The study was conducted on 506 orthodontic patients (183 boys and 323 girls), between13-40 years old, who came to orthodontic department, college of dentistry. The data collected from orthodontic records were analyzed according to the gender, type of dentition and Angle Classes of malocclusion. Dental Midline shifting was observed on patient with respect to patient’s facial midline. SPSS version 20.0 for windows was used for data analyses using Chi-square Pearson tests and Fischer exact tests. Level of significance was set at p<0.05. Results: Around half of the total orthodontic patients had dental midline shifting (49.41 %) which was greater in the maxilla (25.89%) than the mandible (23.52%) slightly. The prevalence of dental midline shifting was more in girls (30.2%), with permanent dentition (48.02%) and with Class I (26.28%) and Class II (18.18) malocclusion. Conclusions: The prevalence of maxillary-mandibular dental midlines was seen in around half of orthodontic patients only. Class I patients were found to have maximum dental midline shift.
Background: returning surface of the enamel to its pre-orthodontic state after debonding of brackets without any damage to the texture of enamel is a clinical contest. removal of Residual adhesive using correct and suitable tools and methods ensures a smooth surface and healthy plaque-free environment. Therefore; the study aims to determine the safest method to finish enamel surface after bracket debonding using three different methods.Method: Thirty premolars extracted for orthodontic purposes were selected for this study. The samples were coded 1-30 randomly and surface roughness was measured before bracket placement using profilometer. Then bracket bonded in the middle third of the buccal surface of the premolars and then debonded using debonding plier. The sample was divided into three groups, 10 for each group (group 1: 18-flute tungsten carbide bur, group 2: 12-flute tungsten carbide bur, group 3: adhesive removing plier). Then the second roughness measurement was recorded.Result: It is found that debonding with adhesive removing plier was the least efficient method followed by 12-fluted tungsten carbide bur, so the best clean-up method in this study achieved is by using 18-fluted tungsten carbide bur. Conclusion:The 18-fluted flame-shaped tungsten carbide bur at high speed for orthodontic adhesive removal demonstrated more favorable results in our hands, as it resulted in the smoothest enamel surface and could reasonably be used as a standard by which future other burs or other procedures are compared.
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