미맹출 영구 견치 및 소구치 근원심 폭경 추정에 관한 연구

Abstract

The purpose of this study was to establish regression equations and probability charts for predicting the sum of mesiodistal crown diameters of unerupted unilateral canine and premolars from the sum of mesiodistal crown diameters of four mandibular incisors in Korean male and female. The plaster casts of 162 children(75 boys and 87 girls) among the contestees in 1994-2001 Healthy Dentition Contest in Seoul were measured. Sex differences are compared and the following results were obtained: 1. Bilateral comparison of sum of widths of permanent canine and premolars showed no significant differences for either sex(p>0.05). Sum of widths of permanent canine and premolars of male were significantly larger than that of female(p<0.01). 2. Regression equations for the prediction of sum of widths of permanent canine and premolars in each sex were as follows Male 345 y= 10.45+0.53x Male 345 : y= 10.07+0.51x Female 345 : y=12.65+0.42x Female 345 : y=11.70+0.42x Male+female 345 y=11.01+0.50x Male+female 345 : y=9.87+0.51x