III급 부정교합자의 안모유형에 관한 연구

• 영문명: The cephalometric study of facial types in Class III malocclusion
• 발행기관: 대한치과교정학회
• 저자명: 김수철(Soo-Cheol Kim) 이기수(Ki-Soo Lee)
• 간행물 정보: 『The Korean Journal of Orthodontics』제20권 제3호, 569~589쪽, 전체 21쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1990.12.31

영문 초록

It is the aim of this study to observe the distribution of various facial types in class III malocclusion and to characterize the craniofacial features of the very facial types. Cephalometric headplates of a hundred and ten persons showing bilateral class III malocclusion whose mean age was 12.51 years and sixty nine persons of normal occlusion whose mean age was 12.23 years were measured and statistically analyzed. The following summary and conclusions were drawn. 1. Affording the bases for SNA and SNB, 35.45% of sample showed normally positioned maxilla and protruded mandible, 30.00% for retruded maxilla and normally positioned mandible, 15.45% for retruded maxilla and protruded mandible, 10.90% for both maxilla and mandible within normal range and 8.20% for miscellaneous types were arranged in class III malocclusion. 2. 52.72% of sample showed neutrodivergent, 35.45% for hyperdivergent and 11.81% manifested hypodivergent mandible in class III malocclusion. 3. Providing the bases for facial and mandibular planes, 33.63% of sample showed prognathic and neutrodivergent, 20.90% for mesognathic and hyperdivergent, 17.27% for prognathic and hyperdivergent and 15.45% for mesognathic and neutrodivergent were arranged in class III malocclusion. 4. The class III malocclusion brought out shorter cranial base, smaller saddle angle, and larger articular and gonial angle. It showed retropositioned maxilla and forward positioned mandible in spite of no significant differences in linear measurements of mandible. Anterior lower facial height was significantly larger in class III malocclusion, while posterior total facial and anterior total facial heights exhibited no significant differences. 5. It is suggested class III malocclusion was attributed to shorter cranial base, smaller saddle angle, maxillary deficiency and/or retrusion, mandibular excess and/or protrusion, excessive vertical growth of the anterior lower face, and their complex as well.