The effect of varying peripheral bone structure and bone density on the occlusal stress distribution of human premolar regions

사람 소구치부위에서 주위골의 구조 및 밀도변화가 교합력에 의한 치아의 응력분포에 미치는 영향

  • Suh, Ye-Joon (Dept. of Prosthodontics, Oral Science Research center, College of Dentistry, Yonsei University) ;
  • Shim, June-Sung (Dept. of Prosthodontics, Oral Science Research center, College of Dentistry, Yonsei University) ;
  • Lee, Keun-Woo (Dept. of Prosthodontics, Oral Science Research center, College of Dentistry, Yonsei University) ;
  • Chung, Moon-Kyu (Dept. of Prosthodontics, Oral Science Research center, College of Dentistry, Yonsei University) ;
  • Lee, Ho-Yong (Dept. of Prosthodontics, Oral Science Research center, College of Dentistry, Yonsei University)
  • 서예준 (연세대학교 치과대학 보철학교실, 구강과학연구소) ;
  • 심준성 (연세대학교 치과대학 보철학교실, 구강과학연구소) ;
  • 이근우 (연세대학교 치과대학 보철학교실, 구강과학연구소) ;
  • 정문규 (연세대학교 치과대학 보철학교실, 구강과학연구소) ;
  • 이호용 (연세대학교 치과대학 보철학교실, 구강과학연구소)
  • Published : 2003.03.30

Abstract

This study used FEM(Finite Element method) based on micro-CT images to see the effects of occlusal force distribution with varying bone density and structure. the mandibular premolar region from human cadaver, thickness of 10mm was imaged using micro-CT. the cross sectional images were taken every $10{\mu}m$. these were reconstructed and the longitudinal image at the mid point of mesiodistal of the speciman was obtained for the specimen for the FEM. The stress disribution produced by a vertical force at 100N and 100N horizontal were analyzed by MSC Nastran FEM Package. according to the result of this study the occlusal force distribution depends on the structure of cancellus bone and for further information on the occlusal force distribution on the tooth and the surrounding structure requires further studies on cancellus bone structure. CEJ of all model show the highest peak and region whice meet teeth and bone show second high peak. Original model and cortical bone add model show different stress distribution. Stress distribution changed according to bone structures and densities.