Biomechanical Effects of Facial Mask according to Direction of Forces on the Craniofacial Complex : A Finite Element Study

두개안면복합체에서 Face Mask의 견인방향에 따른 생역학적 연구 : 유한요소법 연구

  • Hyun, Ha-Young (Department of Orthodontics, School of Dentistry, Dankook University) ;
  • Cha, Kyung-Suk (Department of Orthodontics, School of Dentistry, Dankook University) ;
  • Chung, Dong-Hwa (Department of Orthodontics, School of Dentistry, Dankook University)
  • 현하영 (단국대학교 치과대학 교정학교실) ;
  • 차경석 (단국대학교 치과대학 교정학교실) ;
  • 정동화 (단국대학교 치과대학 교정학교실)
  • Published : 2007.12.30

Abstract

Recently, many studies were reported accurate analysis of facemask effect due to the development of the personal computers and computer programs. The aim of this study is appropriate protraction direction of facemask using finite element study with computer aided design and computer aided measurement. The construction of the three dimensional FEM was based on the computer tomography(CT) scans of 13.5 year-old male subject. Protraction force of 500 mg was applied at 0, 30, 60 and 90 degrees downwards to the Frankfort horizontal plane, and maxillary displacement and stress distribution were measured. When 60 degree force was applied, it showed forward movement of premolar roots area and downward movement of anterior nasomaxillary area, and others showed clockwise rotation movement of the nasomaxillary complex. Finally, we can produce the protraction of maxillary bone without rotation of maxilla about 60 degrees.

Keywords

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