대한의용생체공학회:학술대회논문집 (Proceedings of the KOSOMBE Conference)
- 대한의용생체공학회 1995년도 추계학술대회
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- Pages.34-38
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- 1995
인공고관절 전치환술에 있어서 비구 재건 술에 관한 3차원 유한요소해석
3-D Finite Element Analysis of Acetabular Reconstruction of THR
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류제청
(산재의료 관리원, 재활공학연구센터) ;
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문무성
(산재의료 관리원, 재활공학연구센터) ;
- 김규석 (산재의료 관리원, 재활공학연구센터) ;
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유명철
(경희대학교 의과대학 정형외과학교실)
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Ryu, J.C.
(KLWA, Orthopedic & Rehabilitation Engineering Center(KOREC)) ;
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Mun, M.S.
(KLWA, Orthopedic & Rehabilitation Engineering Center(KOREC)) ;
- Kim, G.S. (KLWA, Orthopedic & Rehabilitation Engineering Center(KOREC)) ;
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Yoo, M.C.
(Department of Orthopedic Surgery, School of Medicine, Kyung Hee University)
- 발행 : 1995.11.17
초록
Using a 3-D finite element method (FEM), the biomechanical characteristics of a threaded truncated acetabular component and a porous coated hemispherical acetabular component were studied. The Von-Mises stress/strain patterns in the acetabulum reconstructed with these two different types of cementless acetabular cups were investigated. The geometry and dimensions of human hemi-pelvis used in the present shape modeling for finite element analysis were scanned with a 3-D laser scanner(TDS-9000, Cyberware, USA). The scanned data was numerically handled with a shape modelling software 'Pro-Engineer'. Using 19836, 16853 tetrahedral elements, respectively, the stress and displacement field of the acetabulum reconstructed with the two different types of the acetabular components were computed. While the hemi-sphere component was found to show a relatively similar stress/strain patterns to those in the normal hip, the results with the threaded cup showed a considerably different patterns from those in the normal condition. Several regions in cancellous bone near the threads and the edge of the truncated cup was found to be overstressed, especially in the superior-lateral part of the acetabulum. It was postulated that the excessive reaming-out of subchondral bone layer when the truncated cup was used can cause the presence of these overstressed regions of cancellous bone. This theoretical prediction for the implanted acetabulum appeared to consistent with the pathological observation of proximal/medial migration of the threaded truncated acetabular prostheses in the previous publications.
키워드