정상 교합과 부정교합에서의 상 · 하악골과 제 1 대구치 위치에 관한 비교연구

• 영문명: A comparative study about the position of upper and lower jaws, and first molars in normal occlusion and Angle´s Class I·II·III malocclusions
• 발행기관: 대한치과교정학회
• 저자명: 윤병모(Byoung-Mo Yun) 안병근(Byoung-Keun Ahn) 이건주(Geon-Ju Rhee) 김선해(Sun-Hae Kim) 박영주(Young-Ju Park) 한호진(Ho
• 간행물 정보: 『The Korean Journal of Orthodontics』제23권 제4호, 633~644쪽, 전체 12쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1993.12.31

영문 초록

There has been so much controversies about the position of upper and lower jaws, and their first permanent molars in normal occlusion and Angle´s class I•II•III malocclusions. So, the purpose of this study is to compare the position of upper and lower jaws, and their first molars in normal occlusion and Angle´s class I•II•III malocclusions by lateral cephalometric analysis. The sample consisted of one hundred and twenty girls(thirty in each group) who had completed growth. The findings of this study were as follows : 1. In class I malocclusion, both maxilla and mandible were slightly posterior position than normal occlusion, but they showed harmonious relationship. 2. In class II malocclusion, the mandible was greatly retruded, and the maxilla was also slightly retruded to the cranial base as compared with normal occlusion. 3. In class III malocclusion, the maxilla was significantly retruded to the cranial base, but no significant difference was found in mandibular position as compared with normal occlusion. 4. The maxillary first molar was located at posterior position in class II malocclusion, and anterior position in class III malocclusion to the cranium, so that the rotation of mandible was influenced by that. 5. The mandibular first molar showed constant relationship to the mandible in all four groups, but different position to the cranial base in direct proportion to the mandibular position. 6. On the treatment planning of class II malocclusion, it seems to be better to promote the mandibular horizontal growth by inhibiting the vertical growth of maxillary molar area, and on the treatment planning of class III malocclusion, it seems to be better to promote the antero-inferior growth of maxilla and to promote the mandibular vertical growth by inducing the vertical growth of maxillary molar area.

키워드

Angle classification jaw position molar position malocclusion cephalometry