Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (35): 5180-5186.doi: 10.3969/j.issn.2095-4344.2016.35.002

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Effects of total knee arthroplasty on proximal tibial reconstruction using finite element analysis

Wang Hai-yu, Wang Ting   

  1. First Department of Orthopedics, Nanyang City Center Hospital, Nanyang 473000, Henan Province, China
  • Revised:2016-06-21 Online:2016-08-26 Published:2016-08-26
  • About author:Wang Hai-yu, Attending physician, First Department of Orthopedics, Nanyang City Center Hospital, Nanyang 473000, Henan Province, China

Abstract:

BACKGROUND: The studies about biomechanics of total knee arthroplasty were more, but the research on finite element analysis of the effect of total knee arthroplasty on proximal tibial reconstruction was not much.

OBJECTIVE: To study the effect of total knee arthroplasty on proximal tibial reconstruction using finite element analysis.
METHODS: We designed knee models of two materials: one was functionally graded material models of collagen and titanium composite materials; another was titanium alloy material model. We created two prosthesis material tibia-knee prosthesis model, and analyzed bone density distribution of proximal tibia, the maximum stress value of the medial tibia and the lateral tibia, and the maximum stress value of medial tibia and prosthesis junction, as well as lateral tibia and prosthesis junction after knee arthroplasty.
RESULTS AND CONCLUSION: (1) Bone density of proximal tibia after total knee arthroplasty: The bone density of the knee prosthesis handle with medial and lateral tibia at the junction of tibial plateau was decreased than that of the initial state. Stress shielding effect was lower in collagen and titanium composite materials of functionally graded material models than that of titanium alloy material model. The bone density of shank end of the tibial prosthesis was obviously increased compared with the medial and lateral tibia, showing stress concentration. (2) The maximum stress value of the medial and the lateral tibia: The maximum stress value of the medial and the lateral tibia in collagen and titanium composite models was lower than that of titanium alloy material model. The maximum stress values of the lateral tibia of collagen and titanium composite models and titanium alloy material model were lower than that of medial tibia. (3) The maximum stress of medial tibia, lateral tibia and prosthesis junction: The stress distribution of collagen and titanium composite models was relatively uniform. The stress distribution of titanium alloy material model showed fluctuation. Stress concentration appeared in pallets and prosthesis junction and the shank end of the prosthesis. The maximum stress values of lateral tibia and prosthesis junction of collagen and titanium composite models and titanium alloy material model were lower than that of medial tibia and prosthesis junction. (4) These findings showed that knee prosthesis has a certain stress shielding effect on tibia after total knee arthroplasty. The stress shielding effect of collagen and titanium composite material prosthesis was lower than titanium alloy material prosthesis, and could improve tibial incurred stress. 

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, Knee, Tibia, Bone Remodeling, Finite Element Analysis, Prosthesis Implantation, Tissue Engineering

CLC Number: