Biomechanical Efects of Tibial Stems with Diferent Structures 
on Human Knee Joint after Total Knee Arthroplasty: A Finite Element 
Analysis

doi:10.1007/s42235-021-00103-x

Journal of Bionic Engineering ›› 2022, Vol. 19 ›› Issue (1): 197-208.doi: 10.1007/s42235-021-00103-x

• • 上一篇

Biomechanical Efects of Tibial Stems with Diferent Structures on Human Knee Joint after Total Knee Arthroplasty: A Finite Element Analysis

Meng Zhang1, Kaiwen Zhang1, He Gong1

1 Department of Engineering Mechanics, Nanling Campus, Jilin University, Changchun 130025, China

收稿日期:2020-08-14 修回日期:2021-09-30 接受日期:2021-10-06 出版日期:2022-01-10 发布日期:2022-02-20
通讯作者: He Gong E-mail:gonghe@jlu.edu.cn
作者简介:Meng Zhang1, Kaiwen Zhang1, He Gong1

Biomechanical Efects of Tibial Stems with Diferent Structures on Human Knee Joint after Total Knee Arthroplasty: A Finite Element Analysis

Meng Zhang1, Kaiwen Zhang1, He Gong1

1 Department of Engineering Mechanics, Nanling Campus, Jilin University, Changchun 130025, China

Received:2020-08-14 Revised:2021-09-30 Accepted:2021-10-06 Online:2022-01-10 Published:2022-02-20
Contact: He Gong E-mail:gonghe@jlu.edu.cn
About author:Meng Zhang1, Kaiwen Zhang1, He Gong1

摘要/Abstract

摘要： Porous structure in orthopedic prosthesis may reduce micromotion and increase the service life of implants. The purposes of this study were to compare the infuence of the tibial stems with solid and porous structures in Total Knee Arthroplasty (TKA) on knee joint and prostheses, and to improve the mechanical stability of the host bone by seeking favorable structure for the tibial stem. The Finite Element (FE) models of TKA knee with four diferent structures in the middle segment of the tibial stem (i.e., solid, cubic, truncated cubic, and octahedral structures) were constructed. The distributions of von Mises stress in the knee joint, tibial prosthesis and proximal tibia, and the compressive stresses of the tibial prosthesis and ultra-high-molecular-weight polyethylene for the four FE models were analyzed. The results showed that the tibial stem flled with the octahedral structure has the best mechanical performance among the above four types of tibial stems. It could efectively reduce the stress concentration and stress shielding efects, and provide an improved mechanical environment for knee joint after TKA. This study would shed some lights on the design and fabrication of porous implants targeted to biomedical applications.

关键词: Total knee arthroplasty, Tibial stem, Porous structure, Finite element analysis, Mechanical performance

Abstract: Porous structure in orthopedic prosthesis may reduce micromotion and increase the service life of implants. The purposes of this study were to compare the infuence of the tibial stems with solid and porous structures in Total Knee Arthroplasty (TKA) on knee joint and prostheses, and to improve the mechanical stability of the host bone by seeking favorable structure for the tibial stem. The Finite Element (FE) models of TKA knee with four diferent structures in the middle segment of the tibial stem (i.e., solid, cubic, truncated cubic, and octahedral structures) were constructed. The distributions of von Mises stress in the knee joint, tibial prosthesis and proximal tibia, and the compressive stresses of the tibial prosthesis and ultra-high-molecular-weight polyethylene for the four FE models were analyzed. The results showed that the tibial stem flled with the octahedral structure has the best mechanical performance among the above four types of tibial stems. It could efectively reduce the stress concentration and stress shielding efects, and provide an improved mechanical environment for knee joint after TKA. This study would shed some lights on the design and fabrication of porous implants targeted to biomedical applications.

Key words: Total knee arthroplasty, Tibial stem, Porous structure, Finite element analysis, Mechanical performance

Meng Zhang, Kaiwen Zhang, He Gong. Biomechanical Efects of Tibial Stems with Diferent Structures on Human Knee Joint after Total Knee Arthroplasty: A Finite Element Analysis[J]. Journal of Bionic Engineering, 2022, 19(1): 197-208.

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Biomechanical Efects of Tibial Stems with Diferent Structures on Human Knee Joint after Total Knee Arthroplasty: A Finite Element Analysis

Biomechanical Efects of Tibial Stems with Diferent Structures on Human Knee Joint after Total Knee Arthroplasty: A Finite Element Analysis

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