Dental arch widths in class i normal occlusion and class ii division 2 malocclusion

The purpose of this study was to compare dental arch widths in Class II division 2 malocclusion with Class I normal occlusion subjects. The Intercanine, Interpremolar and Intermolar widths were measured on 100 dental casts [50 class I and 50 class II12 malocclusion subjects]. The data were developed on SPSS 16 for windows. Independent-samples t-test was applied for comparing the two groups. Lower Intercanine and Intermolar width was larger in class III2 malocclusion group. Interpremolar width between the two groups did not reveal any significant difference. Lower Intercanine and Intermolar width was significantly larger in class II12 malocclusion than the subjects with normal class I occlusion