Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (6): 2319-2324.doi: 10.13229/j.cnki.jdxbgxb20210595

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Finite element analysis of bionic prosthesis based on design of medial meniscus structure

Jian-lin ZUO1(),En-bo LIU1,Zheng-bin JIA2,3,Sheng-hao XU1,Jian-lin XIAO1()   

  1. 1.Department of Orthopaedics，China-Japan Union Hospital of Jilin University，Changchun 130033，China
    2.School of Biological Science and Medical Engineering，Beihang University，Beijing 100191，China
    3.Key Laboratory for Biomechanics and Mechanobiology，Ministry of Education，Beihang University，Beijing 100191，China
  • Received:2021-06-30 Online:2021-11-01 Published:2021-11-15
  • Contact: Jian-lin XIAO E-mail:zuojl@jlu.edu.cn;xiaojianlin10@jlu.edu.cn

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Abstract:

Based on the structure of the human medial meniscus, we designed a free bionic medial meniscus prosthesis to replace the irreparable meniscus in clinic treatment. The feasibility of the prosthesis was verified by a three-dimensional finite element analysis method. The data results show higher stresses in the meniscus prosthesis compared to the wholesome meniscus, with the region of high stress distribution in the medial middle and posterior in both models. The results of the study illustrate that the designed meniscus prosthesis has similar biomechanical properties to the healthy meniscus. The main advantage of the data results validating the prosthesis is that no supplementary fixation pattern is required, avoiding failure due to prosthetic fixation failure.

Key words: bionic engineering, meniscus, biomechanics, finite element analysis

CLC Number: 

  • R314

Fig.1

Concept of prosthesis"

Fig.2

Geometric model of knee joint"

Table 1

Knee joint finite element model information"

组织结构网格尺寸/mm单元数单元类型
股骨391 384C3D4
股骨软骨194 673C3D4
外侧半月板110 028C3D10
内侧半月板114 332C3D10
内侧半月板假体118 809C3D10H
胫骨软骨145 750C3D4
胫骨345 802C3D4

Fig.3

Distribution of maximum compressivestress in medial meniscus"

Fig.4

Meniscus contact stress andcompressive stress data"

Fig.5

Position shift of meniscus prosthesis"

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