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전후방적 분류에 따른 하악 형태 및 Spee 만곡에 대한 antegonial notch의 관계 평가
손주현(J-H Son),김영호(YH Kim),국윤아(YA Kook) 대한치과의사협회 2007 대한치과의사협회지 Vol.45 No.8
The aim of this study was to investigate the relationship between the mandibular antegonial notch and the mandibular morphology, and the curve of Spee in anteroposterior skeletal relationship. Pre-treatment lateral cephalograms were obtained from 80(male 34, female 46) adult orthodontic patients and the samples were classified into 3 categories by ANB angle(0°≤ANB<4° Class Ⅰ, 4°≤ANB Class Ⅱ, ANB<0° Class Ⅲ). The curve of Spee was measured directly from the pre-treatment mandibular study cast of each patient included in this study. Pearson correlation coefficient test and multiple regression analysis in each group revealed the following results; 1. Antegonial notch depth was positively correlated with both lower anterior facial height(ANS-Me) in sketetal Class Ⅰ, Ⅱ and Ⅲ groups and Id-Me height in skeletal Class Ⅰ and Ⅱ groups. 2. A statistically significant negative correlation was found between the depth of the antegonial notch and the curve of Spee in the Class Ⅲ group. 3. Significant relationship was not found between the antegonial notch depth and any of the other cephalometric variables such as mandibular body length(Go-Gn) and ramus height(Co-Go). As antegonial notch depth increased, more vertical growth of the mandible was observed. Antegonial notch can be used as a predictor of vertical mandibular growth in the diagnesis and treatment planning of malocclusion.