대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)

  • 제23권2호
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  • Pages.119-130
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  • 2002
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  • 1229-0807(pISSN)
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  • 2288-9396(eISSN)
대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
권호 표지

대퇴부 거동 해석 및 복합재료 보철물 설계

Behavior Analysis of the Treated Femur and Design of Composite Hip Prosthesis

  • 임종완 (한양대학교 대학원 기계설계학과) ;
  • 하성규 (한양대학교 기계공학과)
  • 발행 : 2002.04.01
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초록

무시멘트 인공 고관절 전치환술 후, 복합재료 스템을 갖는 대퇴골의 장기 거동과 인공 대퇴 보철물의 설계 성능을 분석하기 위하여 비선형 유한요소 프로그램이 개발되었다. 한 발로 서 있을 때의 관절 접촉 하중과 근육하중이 적용되었고, 816개의 brick요소를 갖는 타원형 단면의 복합재료 스템으로 치환된 대퇴골이 3차원 유한요소로 모델링 되었다. 프로그램을 사용하여 대퇴골의 밀도 변화, 응력분포, 상대미소운동이 plate cut과 bend mold와 같은 제작 방법에 대한 스템의 적층 각도 변경에 따라서 평가되었다. 결과는 코발트 크롭 합금, 티타늄 합금, 스테인레스 강과 같은 금속 재료보다 AS4/PEEK, T300/976과 같은 복합재료가 적은 골 흡수를 보였다. 대퇴골 보철물의 장기 안정성 증대는 적당한 복합재료의 적층과 적층 각도의 선택에 의하여 얻어질 수 있었다.

The nonlinear finite element program has been developed to analyze the design performance of an artificial hip prosthesis and long term behavior of a treated femur with stems made of composite material after cementless total hip arthroplasty(THA). The authors developed the three dimentional FEM models of femoral bone with designed composite stem which was taken with elliptic cross section of 816 brick elements under hip contact load and muscle farce in simulating single leg stand. Using the program, density changes, stress distributions and micromotions of the material femoral bone were evaluated by changing fiber orientation of stems for selected manufacturing method such as plate cut and bend mold. The results showed that the composite materials such as AS4/PEEK and T300/976 gave less bone resorption than the metallic material such as cobalt chrome alloy, titanium alloy and stainless steal. It was found that increasing the long term stability of the prosthesis in the femur could be obtained by selecting the appropriate ply orientation and stacking sequence of composite.

키워드

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