骨格型 Ⅲ級 不正校合者의 第2大臼齒 石灰化科程에 關한 硏究

• 영문명: A study on calcification of the second molars in skeletal Class III malocclusions.
• 발행기관: 대한치과교정학회
• 저자명: 車敬石(Kyung-Suk Cha)
• 간행물 정보: 『The Korean Journal of Orthodontics』제11권 제2호, 101~108쪽, 전체 8쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1981.12.31

영문 초록

This investigation was designed to compare the calcification degree of maxillary second permanent molar to mandibular second permanent molar in skeletal Class III Malocclusion. The material selected for this study consisted in standand lateral cephalogram study model and orthopantomogram of two hutidred fifty seven Korean Children, one hundred twenty one boys and one hundred twenty four girls, aged 6 through 12 years, having skeletal Class III Malocclusion. On the basis of findigs of this study, the following results were obtained 1. In the stage of completion of crown, there was no significant difference in calcification degree between maxillary second molar and mandibular second molar; of both boys and girls in skeletal Class III Malocclusion. 2. From 8 years of age at the stage of beginning root formation to 12 years of age, the calcification degree of mandibular second molar was more advanced than Maxillary second molar of both boys and girls in skeletal Class III Malocclusion.