치과용 골유착성 임플랜트 고정체 형상의 응력 분산에 관한 연구
STUDIES OF OSSEOINTEGRATED IMPLANT-MODELS ON STRESS DISTRIBUTION
한종현, 전홍재, 정신영, 허성주, 최용창, 정종평, 구영, 류인철, 김명호,
소속 상세정보
한종현 ( Han Chong-Hyun ) - 연세대학교 치과대학 치과보철학교실
전홍재 ( Chun Heoung-Jae ) - 연세대학교 공과대학 기계공학과
정신영 ( Jung Sin-Young ) - 연세대학교 공과대학 기계공학과
허성주 ( Heo Seong-Joo ) - 서울대학교 치과대학 치과보철학교실
최용창 ( Choi Yong-Chang ) - 가톨릭대학교 의과대학 치과학교실
정종평 ( Chung Chong-Pyoung ) - 서울대학교 치과대학 치주과학교실
구영 ( Ku Young ) - 서울대학교 치과대학 치주과학교실
류인철 ( Rhyu In-Chul ) - 서울대학교 치과대학 치주과학교실
김명호 ( Kim Myung-Ho ) - (주)우리동명 치과재료연구소
KMID : 0362420000380040526
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 verying 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 bone 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 proven to be safe.
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