中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (27): 4265-4270.doi: 10.3969/j.issn.2095-4344.2017.27.001

• 人工假体 artificial prosthesis •    下一篇

有限元法分析髋关节表面置换后髋关节的力学特点

时 亮1,惠文斌1,刘宗智1,杨 佩2   

  1. 1陕西省人民医院骨科,陕西省西安市 710065;2西安交通大学第二医院骨科,陕西省西安市 710004
  • 出版日期:2017-09-28 发布日期:2017-10-24
  • 作者简介:时亮,男,1979年生,陕西省渭南市人,2010年西安交通大学医学院毕业,硕士,主治医师,主要从事骨科方面的研究。
  • 基金资助:

    国家自然科学基金(81000809)

Finite element analysis of the mechanical properties of the hip joint after hip surface replacement  

Shi Liang1, Hui Wen-bin1, Liu Zong-zhi1, Yang Pei2   

  1. 1Department of Orthopedics, Shaanxi Provincial People’s Hospital, Xi’an 710065, Shaanxi Province, China; 2Department of Orthopedics, the Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, Shaanxi Province, China
  • Online:2017-09-28 Published:2017-10-24
  • About author:Shi Liang, Master, Attending physician, Department of Orthopedics, Shaanxi Provincial People’s Hospital, Xi’an 710065, Shaanxi Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81000809

摘要:

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文题释义
髋关节表面置换:顾名思义就是将髋关节表面的部分用假体进行代替从而达到减轻患者痛苦、恢复关节功能的目的。由于置换仅限于关节表面,因此创伤较小,出血少,手术以后髋关节原先解剖结构得到最大程度的保留,功能恢复也较好。在欧美这一手术已成为髋关节初次置换的首选手术。                                                                                                                                                                                  
金属对金属髋关节表面置换的优点:①金属对金属髋关节表面置换术能够最大限度保留原髋关节的力学结构,降低股骨近端的应力遮挡效应;②可降低翻修手术难度;③可降低磨损率。
 
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350 N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(P < 0.05);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(P > 0.05);③股骨头分区8个区域之间应力值差异有显著性意义(P < 0.05),区域6和区域8的应力值高于其他区域(P < 0.05);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。
 
中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程
ORCID: 0000-0002-8088-9983(时亮)

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

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. 

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Hip Joint, Arthroplasty, Replacement, Hip, Prosthesis Implantation, Stress, Mechanical, Finite Element Analysis, Biomechanics, Tissue Engineering

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