부정교합 분류에 따른 상악 중절치의 치관-치근 각도(Collum Angle)에 대한 연구

• 영문명: MAXILLARY INCLSOR CROWN-ROOT ANGLE(COLLUM ANGLE) IN DIFFERENT MALOCCLUSIONS
• 발행기관: 대한치과교정학회
• 저자명: 홍희숙(Hee-Sook Hong) 백형선(Hyoung-Seon Baik)
• 간행물 정보: 『The Korean Journal of Orthodontics』제25권 제4호, 453~463쪽, 전체 11쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1995.08.31

영문 초록

Most comminly used axis for central incisors in lateral cephalometric radiographs is the line connecting root apex and incisor edge. However, crown axis and root axis do not always coincide in cases of malocclusion parients. The angle created by these axis are called the collum angle, which should be considered in orthodontic diagnosis and treatment. In this study, 31 Class Ⅰ malocclusion, 30 Class Ⅱ division 1 malocclusion, 31 Class Ⅱ division 2 malocclusion, and 31 Class Ⅲ malocclusion patients were selected and their collum angles were measured. Correlation between these angles and malocclusions was investigated, and the correlation analysis with other parameters in cephalometrics was done. The results were as follows ; 1.The mean collum angles according to the types of malocclusions are ; 3.11^○ ±3.54^○ for Class Ⅰ, 1.23^○ ± 2.41^○ for Class Ⅱ division1. 3.77^○ ±4.39^○ for Class Ⅱ division 2, and 3.90^○ ±4.08^○ for Class Ⅲ malocclusion. 2. Statistically significant differences in collum angles were noted between Class Ⅱ division 1 group and Class Ⅱ division 2 and Class Ⅲ group. 3. Significant correlations were found between collum angles and other parameters used in cephalometrics, namely IMPA for Class Ⅰ, Wits for Class Ⅱ division 1, Overbite for Class Ⅱ division 2 and for Class Ⅲ.

키워드

치관-치근 각도 치관장축 치근장축 collum angle crown axis root axis