Angle II級 不正交合者의 顎顔面骨格 特性에 關한 硏究

A study on the characteristics of craniofacial skeleton of Angle´s Class II malocclusion cases

This investigation was designed to categorize Angle´s class II malocclusion groups through analyzing horizontal and vertical components of craniofacial skeleton in Angle´s class II malocclusion. The material selected for this study consisted in standard lateral cephalogram of two hundred and twenteen children, eighty eight boys and one hundred twenty four girls, aged 6 through 18 years, having Angle´s class II malocclusion. On the basis of findings of this study, the following results were obtained. 1. In horizontal skeletal classifications, 16 groups were classified according to FMN-A-B, SEFMA-A, Ba-SE-Me, Ba-Se/Ra P. The sequences that have relatively high frequency are as follows: a) Horizontal Group 16 b) Horizontal Group 12 c) Horizontal Group 13 d) Horizontal Group 9 & 15 2. In vertical skeletal classification, 8 groups were classified according to the PMV/PP, PMV/Occ. P. PMV/Mn. P. The sequences that relatively high frequency are as follows; a) Vertical Group A b) Vertical Group D c) Vertical Group C d) Vertical Group H 3. In vertical and horizontal skeletal classifications, the sequence that relatively high frequency are as follows; a) Group 13-A b) Group 16-A & 9-A c) Group 12-A & 15-A d) Group 16-C