ABSTRACT
The purpose of this study was to compare dental arch widths Class II division 1 malocclusion with normal Class I occlusion subjects. The Intercanine, Interpremolar and intermolar widths were measured on 100 dental casts [50 class I and 50 class II/1 malocclusion subjects]. The data was developed on SPSS 16 for windows. Independent-samples t-test was applied for comparison of the groups. Lower Intercanine width was larger in class II/1 malocclusion and Intermolar width was significantly increased in call I normal occlusion group. Interpremolar width between the two groups did not reveal any significant difference. Lower intercanine width was significantly larger in class II/1 and Maxillary intermolar width was significantly narrower in class II/1 malocclusion subjects