313 三次元有限要素法を用いた人工股関節ステム形状の検討

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  • Shape Optimization of Artificial Hip Prosthesis with 3D-FEM

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The long-term success of total hip arthroplasty (THA) depends on the chance of acrylic cement failure and interface disruption. This chance can be diminished by an optimal long-transfer mechanism, whereby stress concentrations are avoided. Implant design is decisive for success or failure. This paper introduces an optimum design of the hip prosthesis. A generic three-dimensional FEM model of the proximal femur containing a cemented femoral stem of a total hip arthroplasty was developed. The design objective was to minimize the largest maximum principal stress in the cement. To verify validity of this design, fatigue analysis according to Miner's Rule was introduced.

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