ArticleJournal of orthopaedic surgery and research2025
Dynamic biomechanical effects of medial meniscus tears on the knee joint: a finite element analysis.
Article in Journal of orthopaedic surgery and research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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5 authors.
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Abstract
backgroundMeniscus tears can change the biomechanical environment of the knee joint and might accelerate the development of osteoarthritis. The aim of this study was to investigate the dynamic biomechanical effects of different medial meniscus tear positions and tear gaps on the knee during walking.
methodsSeven finite element models of the knee joint were constructed, including the intact medial meniscus (IMM), radial stable tears in the anterior, middle, and posterior one-third regions of the medial meniscus (RSTA, RSTM, RSTP), and the corresponding unstable tears (RUTA, RUTM, RUTP). The seven models applied a 1000 N axial static load and a human walking load, as defined by the ISO14243-1 standard.
resultsCompared with the results under static loading, the axial load ratio of the medial and lateral compartments was redistributed (ranging from 0.7:1 to 2.9:1). The stress concentration was in the middle and posterior portions of the lateral compartment, not in the anterior and middle portions of the medial compartment under dynamic analysis. Compared with that of the IMM, the maximum von Mises stress on the medial meniscus increased by approximately 24.68-57.14% in the RUTA, RUTM, and RSTM models, with a greater difference observed in the hoop stress on both sides of the radial tear. The peak radial tear gap appeared at GC6 and GC44, and the tear gap remained at a high level from GC30-GC60.
conclusionsRadial tears should be considered for repair, and reinforced sutures should be placed on the anterior or middle regions of the meniscus. Greater attention should be given to the dynamic biomechanical effects on the knee joint during preoperative diagnosis and postoperative rehabilitation.
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