• Title, Summary, Keyword: Total Hip Replacement(인공 고관절 대치술)

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A Study on the Contact Stress Analysis of the Artificial Hip Joint Using Finite Element Method (유한요소법을 이용한 인공 고관절의 접촉응력 해석에 관한 연구)

  • 김청균;윤종덕
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • pp.189-194
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    • 1996
  • The modern orthopaedics frequently uses the total hip replacement in the artificial hip joint. The wear in this joint requires the re-replacement of the hip joint beacuse it is under the severe load and friction conditions. To solve these problems the previous studies have been mainly focused on the development of the new materials. The research of new material, however, needs much time and effort since it should be experimented for its bio-compatibility, friction, and wear characteristics. To reduce the work, in this study, the finite element analysis is applied to find the new combination of the materials in the total hip replacement which has the excellent contact characteristics. The finite element uses MARC and the 5-node aximetric element. The results show that in case of acetabulum UHMWP has good characteristics, in femoral head, the $Al_2O_3$, and in stem, Ti6Al4V.

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The Distal Filling Effects on Hip Jont Function in Cementless Total Hip Replacement (인공 고관절 대치술에서 무시멘트형 스템의 원위부 압박이 고관철 성능에 미치는 영향)

  • 채수원;박상석;박재원
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.24 no.11
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    • pp.2777-2785
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    • 2000
  • In cementless total hip replacement(THR), an initial stability of the femoral component is important to long term fixation of femoral stem. The intial stability has close relationship with the relative displacement of prosthessis and sponge bone at the proximal of femur. After implantation of the proshesis, the surrounding bone is partially shielded from load carrying and starts to resorb. Stress shielding is the cause of the loss of proximal bone. Assessing stress distribution of femur is important to predict stress shielding. The initial stability and the stress shielding were investigated for two loading conditions approximating a single leg stance and a stair climbing. Three types of stems were studied by the finite element method to analyze the biomechanical effects of distal filling of cementless femoral stems. Three types of stems empolyed are a distal filling stem, a distal flexible stem, and a distal tapered stem.

Biomechanical characteristics of the distal filling effects in cementless femoral stem (무시멘트형 대퇴스템에서 원위부 압박 정도에 따른 생체역학적 특성)

  • Park, Sang-eok;Park, Jae-Won;Chae, Soo-Won
    • Proceedings of the KSME Conference
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    • pp.387-392
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    • 2000
  • In cementless total hip replacement(THR), an initial stability of the femoral component is important to long term fixation of femoral stem. The initial stability has close relationship with the relative displacement of prosthesis and spongy bone at the proximal of femur. After implantation of the prosthesis. the surrounding bone is partially shielded from load carrying and starts to resort. Stress shielding is the cause of the loss of proximal bone. Assessing stress distribution of femur is important to predict stress shielding. The initial stability and the stress shielding were investigated for two loading conditions approximating a single leg stance and a stair climbing. Three types of stems were studied by the finite element method to analyze the biomechanical effects of distal filling of cementless femoral stems, Three types of stems employed are a distal filling stem, a distal flexible stem, and a distal tapered stem.

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