Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (3): 401-405.doi: 10.3969/j.issn.2095-4344.2017.03.014

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Finite element analysis of prosthesis position during hip arthroplasty

Jia Jin-ling, Dong Yu-zhen   

  1. Department of Orthopedic Surgery, First Affiliated Hospital of Xinxiang Medical College, Xinxiang 453100, Henan Province, China
  • Revised:2016-11-01 Online:2017-01-28 Published:2017-03-14
  • About author:Jia Jin-ling, Master, Associate chief physician, Department of Orthopedic Surgery, First Affiliated Hospital of Xinxiang Medical College, Xinxiang 453100, Henan Province, China
  • Supported by:

    the Medical Science and Technology Project of Henan Province in 2014, No. 201403141

Abstract:

BACKGROUND: Three-dimensional finite element studies found that the installation location of the hip prosthesis is closely related to the effects of hip replacement, but studies on different anteversion and abduction angle of the hip prosthesis mounting position on the effects of hip biomechanics are not much.

OBJECTIVE: To analyze the biomechanical characteristics of different prosthetic positions in hip arthroplasty using three-dimensional finite element analysis.
METHODS: One healthy volunteer was selected and data of pelvis and femur were collected. Three-dimensional geometric model of this volunteer was established and received finite element network partitioning. CT scan was used to obtain prosthesis model data and accurate prosthesis model was established. 16 kinds of different prosthesis position model of hip replacement were established. Vertically downward force of 780 N was applied on the top of sacroiliac joint and pubic symphysis. The acetabular stress peak, femoral stress peaks, polyethylene liner peak stress and polyethylene liner damage zone volume of 16 kinds of model were observed.
RESULTS AND CONCLUSION: (1) The acetabular stress peak, femoral stress peaks, polyethylene liner peak stress and polyethylene liner damage zone volume of 16 kinds of different prosthesis position model of hip replacement, anteversion angle 10° abduction angle 50° got the best results. The acetabular stress peak was 51.23 MPa; femoral stress peak was 26.34 MPa. Polyethylene liner peak stress was 5.288 MPa and polyethylene liner damage zone volume was 2.239×10-7 m3. (2) These results indicated that anteversion angle 10° abduction angle 50° is the ideal hip replacement degree. The peak stresses of acetabulum, femur, and polyethylene liner at this installation angle are minimum; polyethylene liner damage zone volume is also minimum. This can provide data for clinical reference. 

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: Arthroplasty, Replacement, Hip , Prosthesis Implantation, Finite Element Analysis, Biomechanics , Tissue Engineering

CLC Number: