청소년기 정상교합자의 전치부 피개도에 관한 연구

Abstract

The purpose of this study was to determine the mean value of overbite and overjet, and to find the correlation among overbite, overjet and relative maxillofacial structures using the data from orthodontic casts and cephalometric films of boys and girls aged from 9 to 18 years with normal occlusions. The results were obtained as follows: 1. Incisal overbite depth was decreased from Group Ⅰ to Group Ⅲ. 2. The highest value of correlation coefficient with incisal overbite was 0.368 of incisal angle in Group Ⅲ. 3. Overjet was not significantly correlated with the age and sex. 4. Ratio of mesiodistal diameters of upper and lower incisors was not significantly correlated with overbite and overjet.