No abstract

The purpose of this study was to compare mandibular asymmetry in different malocclusions, including Angle's Class I malocclusion, Angle's Class II div 1 malocclusion, Angle's Class II div 2 malocclusion, Angle's Class II subdivision and Unilateral posterior cross bite.: A total number of 150 subjects with the age range of 18-24 yrs with no signs and symptoms were selected for the study (n=30). The condylar asymmetry index (CAI), ramal asymmetry Index (RAI) and Condylar and Ranal Asymmetry Index (CRAI) for each patient was measured using panoramic radiograph. The results were analyzes using Kappa test, Dahlberg’s formula and Tukey HSD Post Hoc test. : Group IV (Angle's Class II subdivision malocclusion) had the maximum Condylar Asymmetry Index (13.07 ±12.43mm) whereas Group II (Angle's Class II div 1 malocclusion) had the minimum Condylar Asymmetry Index (7.89 ±8.71mm). Group III (Angle's Class II div 2 malocclusion) had the maximum Ramus Asymmetry Index (3.84 ± 2.54%) whereas Group II (Angle's Class II div 1 malocclusion) had the minimum Ramus Asymmetry Index (2.82 ± 1.94%). Condylar and Ramus Asymmetry Index was seen in Group IV (Angle's Class II subdivision malocclusion) (3.61 ± 2.43 mm) whereas minimum condylar and ramus asymmetry index was seen in Group V (Unilateral posterior cross bite) (2.42 ± 2.08 mm). However, no statistically significant differences were found.: No statistically significant difference was found in vertical mandibular asymmetry indices when compared in different malocclusions. No gender related statistically significant difference was found in all groups.

: to compare the aligning efficiency, pain experienced by the patient during alignment and the post alignment third order values of anterior teeth in I arch (study) group and conventional NiTi (control) wire group.: A prospective clinical study.: A total of 40 dental arches (maxilla/mandible) were divided into 2 study groups with 20 dental arches (maxilla/mandible) in each group based on the selection criteria. Group I. Twenty dental arches (maxillary/mandibular) having 0.018” preadjusted appliance (MBT) brackets (ORMCO), aligned with I –arch 0.016”x0.014” copper NiTi wires. Group II. Twenty dental arches (maxillary/mandibular) having 0.018” preadjusted appliance (MBT) brackets by ORMCO aligned with round super elastic NiTi archwires.: I -arch copper NiTi (study group) was more efficient in alignment compared to the superelastic NiTi (control group) in the lower arch and the values are statistically significant. There was torque expression in the I-arch group as compared to the superelastic NiTi group. The subjects in the I-arch (study group) experienced lesser pain compared to the superelastic NiTi (control group) and the pain values are statistically significant.