The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

STUDIES OF OSSEOINTEGRATED IMPLANT-MODELS ON STRESS DISTRIBUTION

치과용 골유착성 임플랜트 고정체 형상의 응력 분산에 관한 연구

  • Han, Chong-Hyun (Department of Prosthodontics, College of Dentistry, Yonsei University) ;
  • Chun, Hung-Jae (School of Electrical & Mechanical Engineering, Yonsei University) ;
  • Jung, Sin-Young (School of Electrical & Mechanical Engineering, Yonsei University) ;
  • Heo, Seong-Joo (Department of Prosthodontics, College of Dentistry, Seoul National University) ;
  • Choi, Yong-Chang (Department of Dentistry, Medical School, Catholic University) ;
  • Chung, Chong-Pyung (Department of Prosthodontics, and Dental Research Institute College of Dentistry, Seoul National University) ;
  • Ku, Young (Department of Prosthodontics, and Dental Research Institute College of Dentistry, Seoul National University) ;
  • Ryu, In-Chul (Department of Prosthodontics, and Dental Research Institute College of Dentistry, Seoul National University) ;
  • Kim, Myung-Ho (Company of Dongmoung)
  • 한종현 (연세대학교 치과대학 치과보철학교실 (영동세브란스)) ;
  • 전흥재 (연세대학교 공과대학 기계공학과) ;
  • 정신영 (연세대학교 공과대학 기계공학과) ;
  • 허성주 (서울대학교 치과대학 치과보철학교실) ;
  • 최용창 (카톨릭대학교 의과대학 치과학교실 (여의도 성모)) ;
  • 정종평 (서울대학교 치과대학 치주과학교실 및 치의학연구소) ;
  • 구영 (서울대학교 치과대학 치주과학교실 및 치의학연구소) ;
  • 류인철 (서울대학교 치과대학 치주과학교실 및 치의학연구소) ;
  • 김명호 (주식회사 동명)
  • Published : 2000.05.01
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Abstract

Finite element analyses were performed to study effects on stress distribution generated in jaw bone for various shapes of dental implants: plateau type, plateau with small radius of curvature, triangular thread screw type in accordance with ISO regulations and square thread screw filleted with small radius partially. It was found that square thread screw filleted with small radius was more effective on stress distribution than other dental implants used in analyses. Additional analyses were performed on the implant with square thread screw filleted with small radius for very-ing design parameters, such as the width of thread end, the height of the thread of the implant and load direction, to determine the optimum dimensions of the implant. The highest stress concentration occurred at the region in jaw Pone adjacent to the first thread of the implant. The maximum effective stress induced by a 15 degree oblique load of 100 N was twice as high as the maximum effective stress caused by an equal amount of vertical load. Stress distribution was more effective in the case when the width of thread end and the height of thread were p/2 and 0.46p, respectively, where p is the pitch of thread. At last, using tensile force calculated from the possible insert torque without breading bone thread, finite element analysis was performed on the implant to calculate pre-stress when the primary fixation of the implant was operated in jaw bone. The maximum effective stress was 136.8 MPa which was proven to be safe.

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