Arch widths in adults with class I normal occlusion and class III malocclusion

The purpose of this study was to compare dental arch widths in Class III malocclusion with Class I normal occlusion subjects. Methodology: The Intercanine, Interpremolar and Intermolar widths were measured on 70 dental casts [35 class I and 35 class III malocclusion subjects]. The data was developed on SPSS 16 for windows. Independent-samples t-test was applied for comparing the two groups. Upper interpremolar and intermolar widths were narrower and lower Intercanine and Intermolar width was larger in class III malocclusion group. Upper intercanine and lower Interpremolar width between the two groups did not reveal any significant difference. In class III malocclusion, almost all the dental arch width measurements in maxilla were smaller and mandibular dental arch width measurements were lager as compared to normal class I normal occlusion