The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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A ROENTGENOCEPHALOMETRIC STUDY ON THE DEPTH OF THE ANTEGONIAL NOTCH AND THE CRANIOFACIAL MORPHOLOGY IN CLASS III MALOCCLUSION

제3급 부정교합자의 악각전절흔 심도와 두안면골격 형태에 관한 두부방사선 계측학적 연구

  • Kim, Hyung-Soo (Department of Orthodontics, College of Dentistry, Seoul National University) ;
  • Nahm, Dong-Seok (Department of Orthodontics, College of Dentistry, Seoul National University)
  • 김형수 (서울대학교 치과대학 교정학교실) ;
  • 남동석 (서울대학교 치과대학 교정학교실)
  • Published : 1989.03.01
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Abstract

This study was undertaken to investigate the relationship between the depth of antegonial notch and the craniofacial morphology, and to predict the mandibular growth direction & potential in class III malocclusion. The computerized analyses were carried out on longitudinal lateral cephalometric radiographs of 50 children with class III malocclusion, divided into two groups ; 30 deep notch subjects (more than 2.6mm) and 20 shallow notch subjects (less than 1.5mm). The conclusions were as follows: 1. The mandibular growth direction in deep notch group was more vertically directed than in shallow notch group. 2. Deep notch group had shorter anterior & posterior cranial base than shallow notch group. 3. There was not significant difference between deep & shallow notch groups in the amount of mandibular growth during treatment period. 4. Notch depth increased in both deep & shallow notch groups during treatment period.

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