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03 March 2020 : Animal Research  

Establishment and Simulation of 3D Geometric Models of Mini-Pig and Sheep Knee Joints Using Finite Element Analysis

Peng-fei Han1BC, Rong Zhang2BC, Yang-yang Gao3D, Pengcui Li3EG, Xiao-chun Wei3FG, Zhi Lv3A*

DOI: 10.12659/MSM.921540

Med Sci Monit 2020; 26:e921540

Abstract

BACKGROUND: Our objective was to establish and compare three-dimensional models of knee joints of mini-pigs and sheep, the 2 most commonly used animal models of osteoarthritis.

MATERIAL AND METHODS: Three-dimensional geometric models of knee joints were used to assess their biomechanical properties by analysis of the three-dimensional finite element stress load for flexion at 30° and 60°.

RESULTS: Analysis of multiple tissues indicated that the sheep knee had greater stress peaks than the mini-pig knee at 30° flexion (range: 12.5 to 30.4 Mpa for sheep vs. 11.1 to 20.2 Mpa for mini-pig) and at 60° flexion (range: 17.9 to 43.5 Mpa for sheep vs. 15.9 to 28.9 Mpa for mini-pig). In addition, there was uneven distribution of stress loads in the surrounding ligaments during flexion.

CONCLUSIONS: Our three-dimensional finite element analysis indicated that the mini-pig knee joint had stress values and changes of cartilage, meniscus, and peripheral ligaments that were similar to those of the human knee.

Keywords: Anterior Cruciate Ligament, Finite Element Analysis, Imaging, Three-Dimensional, Sheep, Swine, Miniature, Biomechanical Phenomena, Computer Simulation, Computer-Aided Design, Knee Joint, Models, Biological, Osteoarthritis, Range of Motion, Articular, Swine

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750