A RADIOGRAPHIC STUDY ON CRANIOFACIAL ASYMMETRY BY POSTERO-ANTERIOR CEPHALOMETRY

Postero-Anterior Cephalometry를 이용한 안모의 비대칭에 관한 연구

The purpose of this article was to determine the amount of cranio-facial asymmetry in normal subject before the analysis of the cranio-facial asymmetry as the result of internal derangement in T.M.J. dysfunction. The author has conducted analysis using Cephalometric P-A reviews of 54 males and 51 females. Following the Grayson's method of measurement, the standard value of cranio-facial asymmetry in normal subject was obtained. The following results were obtained: 1. Compared with right and left width, asymmetry could be identified in normal subject, although the degree of the difference appears to be small. 2. In male, asymmetric value of contact point of the upper central incisors is 0.76±0.84㎜ that of the lower central incisors is 0.86±0.86㎜, and that of center of genial tubercle is 0.87±1.06㎜. In female, asymmetric value of contact point of the upper central incisors is 1.03±1.29㎜, that of lower incisors is 1.11 ±1.18㎜, and that of center of genial tubercle is 1.45±2.15㎜. 3. Cranio-facial saymmetry in female is somewhat greater than that of male.