Abdul Mueez, Adusumilli Gopinath, Sameer Ahmed , Neelakantha V Patil, Venkata Naidu Bavikati, Ayub Khan

ABSTRACT

Objectives: To evaluate the role of transverse discrepancy in the form of arch width, alveolar width andbuccolingual inclination of maxillary and mandibular posterior teeth between Class II division 1 malocclusion and Class I occlusion. Materials and Methods: Study consist of 25 subjects with Class I occlusion and 25 subjects with Class II division 1 malocclusion were selected to measure arch width & alveolar width with a standard caliper and Buccolingual inclination of maxillary and mandibular posteriors were measured with a bevel protractor. Results: Lingual tilted posterior teeth are seen in both the arches. The premolars and first molars of maxillary arch were significantly more lingually tilted (P< .05) in Class II division 1 malocclusion than in Class I occlusion, but in the mandibular arch first premolars were significantly less lingually tilted in Class II division 1 malocclusion than in Class I occlusion. No significant difference of Buccolingual inclination was found in mandibular second premolars and first molars between the two groups. No significant differences found between the groups with respect to arch width and alveolar width. Conclusions: Buccolingual inclination plays an important role in transverse discrepancy of Class II division 1 malocclusion, whereas no difference found with respect to arch width and alveolar width.