骨质疏松患者全髋关节置换术后股骨应力变化的有限元分析

发布时间：2018-04-02 20:51

本文选题：有限元分析　切入点：骨质疏松　出处：《中国矫形外科杂志》2017年03期

【摘要】：[目的]建立骨质疏松患者全髋关节置换术后股骨三维有限元模型,分析骨质疏松患者全髋关节置换术后股骨侧应力分布,为手术操作及假体的选择提供生物力学依据。[方法]采用64排螺旋CT扫描骨质疏松患者(骨密度检查提示)行全髋置换术后数据,建立骨质疏松患者全髋关节置换术后股骨三维有限元模型。对该模型进行模拟加载及仿真计算。分析骨质疏松患者全髋置换术后股骨的应力分布特点。[结果]骨质疏松患者行髋关节置换术后股骨侧应力分布由股骨近端向远端逐渐增大,应力峰值为股骨假体末端周围皮质,主要集中在假体末端与股骨内侧骨皮质交界处。通过有限元力学分析,在骨质疏松患者行关节置换术后,假体周围力学分布在各区域存在差异,差异有统计学意义(P0.05)。[结论]通过对骨质疏松患者行全髋关节置换术后假体周围应力分布特点的分析,在手术操作过程中,应选择远端压配型假体,假体放置需避免内外翻,以减少假体远端与股骨皮质的应力集中区。
[Abstract]:[objective] to establish a three-dimensional finite element model of femur after total hip arthroplasty in patients with osteoporosis and analyze the stress distribution of femur after total hip arthroplasty in order to provide biomechanical basis for operation and selection of prosthesis.[methods] Three-dimensional finite element model of femur after total hip arthroplasty was established in patients with osteoporosis by 64 slice spiral CT scanning (bone mineral density examination).The model is loaded and simulated.To analyze the stress distribution of femur after total hip replacement in patients with osteoporosis.[results] after hip arthroplasty, the stress distribution of the femoral side increased gradually from proximal to distal end of femur, and the peak stress was the cortex around the end of the femoral prosthesis, which was mainly located at the junction between the end of the prosthesis and the medial bone cortex of the femur.According to the finite element mechanical analysis, the mechanical distribution around the prosthesis was different in different regions after joint replacement in patients with osteoporosis, and the difference was statistically significant (P 0.05).[conclusion] based on the analysis of the stress distribution around the prosthesis after total hip arthroplasty in patients with osteoporosis, the distal compression prosthesis should be selected during the operation, and the internal and external inversion should be avoided in the placement of the prosthesis.In order to reduce the distal end of the prosthesis and femoral cortex stress concentration area.
【作者单位】：安徽省马鞍山市人民医院关节外科;
【基金】：马鞍山市第九批局科教专项资金资助项目(编号:马鞍山市卫办〔2012〕226号)
【分类号】：R580;R687.4

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