The sensitivity of cartilage contact pressures in the knee joint to the size and shape of an anatomically shaped meniscal implant

Journal of Biomechanics
M KhoshgoftarN Verdonschot

Abstract

Since meniscal geometry affects the cartilage contact pressures, it is essential to carefully define the geometry of the synthetic meniscal implant that we developed. Recently, six independent modes of size- and shape-related geometry variation were identified through 3D statistical shape modeling (SSM) of the medial meniscus. However, this model did not provide information on the functional importance of these geometry characteristics. Therefore, in this study finite element simulations were performed to determine the influence of anatomically-based meniscal implant size and shape variations on knee cartilage contact pressures. Finite element simulations of the knee joint were performed for a total medial meniscectomy, an allograft, the average implant geometry, six implant sizes and ten shape variations. The geometries of the allograft and all implant variations were based on the meniscus SSM. Cartilage contact pressures and implant tensile strains were evaluated in full extension under 1200N of axial compression. The average implant induced cartilage peak pressures intermediate between the allograft and meniscectomy and also reduced the cartilage area subjected to pressures >5MPa compared to the meniscectomy. The smaller imp...Continue Reading

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Citations

Feb 24, 2016·Journal of Biomechanics·Steve A MaasJeffrey A Weiss
Apr 26, 2015·Journal of Biomechanics·Tammy L Haut DonahueSuzanne A Maher
May 6, 2015·Journal of Biomechanics·Tammy Donahue
Aug 24, 2017·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Hiroshi NakayamaMasaru Higa
Aug 15, 2017·Tissue Engineering. Part C, Methods·Andrzej BrzezinskiMichael G Dunn
May 3, 2016·Sports Medicine and Arthroscopy Review·Natasha TrentacostaWayne K Gersoff
Apr 13, 2020·Medical & Biological Engineering & Computing·Hamid NaghibiNico Verdonschot
Jun 24, 2020·Biomechanics and Modeling in Mechanobiology·Milad ImeniAbbas Samani

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