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Total hip arthroplasty (THA) patients sometimes encounter periprosthetic fractures. Sudden and high impact loading during certain activities may contribute to the incident such as sideway falls and be...nding. In this study, damage formation in femoral bone with a hip prosthesis was predicted using the CT-based nonlinear finite element method. 3D model of femoral shaft was developed from CT-images of a 54 years old patient. The femoral head was then cut off and aligned with hip prosthesis stem to reconstruct THA model. Three different configurations of isometric loadings were considered to demonstrate high and complex impact loading. The applied impact forces were normalized to body weight (BW) and vary from 1BW to 5BW. The results showed that the patterns of predicted bone fractures were different for each configuration. Numbers of element failures were the highest in the lateral bending condition. Indication of failure elements at the bone-implant interfaces suggested possibility of prosthesis loosening and instability.続きを見る
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