中国组织工程研究2017，Vol.21Issue(27)：4265-4270,6.DOI:10.3969/j.issn.2095-4344.2017.27.001
有限元法分析髋关节表面置换后髋关节的力学特点
Finite element analysis of the mechanical properties of the hip joint after hip surface replacement
摘要
Abstract
BACKGROUND:There are many researches on the finite element analysis of total hip arthroplasty, but the biomechanical distribution after hip surface replacement is little reported.OBJECTIVE: To analyze the biomechanical characteristics after hip surface replacement based on three- dimensional finite element analysis.METHODS: The three-dimensional finite element model after metal-to-metal hip surface replacement was established.The load of 350 N paralleling to the gravity line was loaded on the acetabulum. The stress distribution of the prosthesis and femur and the stress of the different regions of the femoral head were observed.RESULTS AND CONCLUSION: (1) The stress value of the acetabular cup was significantly higher than that of the acetabular body ((0.63± 0.34) vs. (1.89±0.67) MPa, P < 0.05). (2) The stress was concentrated on the femoral neck. The femoral head and femoral neck junction appeared with stress occlusion. The stress around the femoral prosthesis stem was (158.24±28.79) MPa, and the stress value of the femoral prosthesis stem was (186.46±22.37) MPa, showing no significant difference (P > 0.05). (3) The stress value showed significant difference among femoral head regions (P <0.05), and the stress of the regions 6 and 8 was significantly higher than that of the other regions (P < 0.05). (4) These results show that after metal-to-metal hip surface replacement, femoral neck stress is concentrated, the stress of the femoral prosthesis is occluded, and the stress at the medial femoral neck as well as the junction of femoral neck prosthesis and bone is larger.关键词
骨科植入物/数字化骨科/髋关节/假体/应力/表面置换术/三维有限元/生物力学/应力遮挡/国家自然科学基金分类
医药卫生引用本文复制引用
时亮,惠文斌,刘宗智,杨佩..有限元法分析髋关节表面置换后髋关节的力学特点[J].中国组织工程研究,2017,21(27):4265-4270,6.基金项目
the National Natural Science Foundation of China, No. 81000809国家自然科学基金(81000809) （81000809）
