A CEPHALOMETRIC STUDY BY DOWNS ANALYSIS IN THE CHILDREN WITH NORMAL OCCLUSION

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Journal of the Korean Academy of Pediatric Dentistry 2002;29(3):295-303.
Published online August 31, 2002.

A CEPHALOMETRIC STUDY BY DOWNS ANALYSIS IN THE CHILDREN WITH NORMAL OCCLUSION

정상교합아동의 Downs 분석법에 의한 두부방사선 계측학적 연구

최남기, 정병초, 양규호

전남대학교 치과대학 소아치과학교실 및 치의학 연구소

Abstract

This study was performed to establish the cephalometric standards in Downs analysis and to compare them with other races. The lateral cephalograms of 88 Korean children (47 boys, 41 girls) with normal occlusion and acceptable profile between 7 and 11 years of age were taken and Downs analysis was done. Results were as follows: 1. Norms of Korean boys, girls and both sexes at 7, 9, 11 years of age by Downs analysis were established. 2. There were no statistically significant differences between boys and girls about ten measurements in each group, but significant differences in the occlusal plane angle, lower 1 to occlusal plane angle, interincisal angle, upper 1 to APog plane among 3 groups(p<0.05)(p<0.01). 3. Facial angle, AB plane angle, Y-axis, lower 1 to occlusal plane angle and lower 1 to mandibular plane angle showed increasing tendency whereas angle of convexity, mandibular plane angle, occlusal plane angle and interincisal angle did decreasing tendency according to aging. 4. In comparison among races, measurements in Korean children were generally larger than those of Caucasian and Greek except for small interincisal angle, but Korean were similar to Japanese, Chinese, Israeli, Negro about all measurements.

Key Words: Downs analysis, Cephalograms, Normal occlusion, Korean children