Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (27): 4265-4270.doi: 10.3969/j.issn.2095-4344.2017.27.001

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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

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

CLC Number: