Tooth size discrepancy in various malocclusion groups

ABSTRACT

To compare tooth size discrepancy among dental class I, class II div 1, class II div 2 and class III malocclusions. This study was conducted during 2006-2007 at the Orthodontic department of Islamic International Dental Hospital, Islamabad. It was a cross sectional study conducted with sampling technique of non-probability [purposive]. Sample sizes were 200 patients with different malocclusion classes. Age ranged between 13 to 20 years. Bolton's ratio was used to determine the overall and anterior tooth size ratio amongst the various malocclusion groups. Bolton's anterior and overall ratios showed statistically significant differences among malocclusion groups. The mean anterior and overall Bolton's ratios for the different groups was in the order of Class III > Class I > Class II division 2 > Class II division 1. In our study statistically significant differences were found among different malocclusion groups and Class III group was found to have greater tooth size discrepancy than other malocclusion groups