有限元法分析髋关节表面置换后髋关节的力学特点

发布时间：2018-02-13 19:10

本文关键词：髋关节关节成形术置换髋假体植入应力物理有限元分析生物力学组织工程骨科植入物数字化骨科假体应力表面置换术三维有限元应力遮挡国家自然科学基金　出处：《中国组织工程研究》2017年27期 　论文类型：期刊论文

【摘要】：背景:有限元分析在全髋关节置换中的研究比较多,对髋关节表面置换后生物力学分布特点的研究较少。目的:三维有限元法分析髋关节表面置换后髋关节的生物力学特点。方法:建立金属对金属髋关节表面置换后的三维有限元模型,在髋臼侧加载与重力线平行的350N载荷,观察假体应力分布、股骨应力分布和股骨头不同区域应力值。结果与结论:①髋臼杯沿和髋臼主体的应力值分别为(0.63±0.34)MPa和(1.89±0.67)MPa,髋臼杯沿的应力值高于髋臼主体(P0.05);②应力集中在股骨颈,股骨头和股骨颈交界处出现应力遮挡,股骨假体柄周围骨质的应力值为(158.24±28.79)MPa,股骨假体柄应力值为(186.46±22.37)MPa,股骨假体柄周围骨质和股骨假体柄的应力值比较差异无显著性意义(P0.05);③股骨头分区8个区域之间应力值差异有显著性意义(P0.05),区域6和区域8的应力值高于其他区域(P0.05);④表明金属对金属髋关节表面置换后股骨颈应力集中,股骨假体侧应力遮挡,股骨颈内侧、股骨颈假体和骨质交界处的应力较大。
[Abstract]:Background: finite element analysis (FEM) has been widely used in total hip arthroplasty. Few studies have been done on the biomechanical characteristics of the hip joint after surface replacement. Objective: to analyze the biomechanical characteristics of the hip joint after the surface replacement by three dimensional finite element method. Methods: to establish the metal to metal surface replacement of the hip joint. After the 3D finite element model, The stress distribution of the prosthesis was observed by loading 350 N load parallel to the gravity line on the acetabular side. Results and conclusion the stress values of the acetabular cup edge and the acetabular body were 0.63 卤0.34 MPA and 1.89 卤0.67 MPA, respectively. The stress values of the acetabular cup edge were higher than that of the acetabular body (P 0.05). Stress occlusion occurs at the junction of the femoral head and the femoral neck. The stress value of periprosthetic bone was 158.24 卤28.79 MPA, and that of femoral prosthesis was 186.46 卤22.37 MPA. There was no significant difference in stress between the surrounding bone of femoral prosthesis and femoral prosthesis. The stress values in region 6 and region 8 were higher than those in other regions, indicating that the stress concentration of the femoral neck after metal hip surface replacement was higher than that in other regions. The stress is larger in the medial femoral neck and at the junction of femoral neck prosthesis and bone.
【作者单位】：陕西省人民医院骨科;西安交通大学第二医院骨科;
【基金】：国家自然科学基金(81000809)~~
【分类号】：R318.01;R687.4

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