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Load sharing and ligament strains in balanced, overstuffed and understuffed UKA. A validated finite element analysis.

par Innocenti, Bernardo ;Bilgen, Omer Faruk;Labey, Luc;van Lenthe, G Harry;Vander Sloten, Jos;Catani, Fabio
Référence The Journal of arthroplasty, 29, 7, page (1491-1498)
Publication Publié, 2014-07

Article révisé par les pairs

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Résumé :

The aim of this study was to quantify the effects of understuffing and overstuffing UKA on bone stresses, load distribution and ligament strains. For that purpose, a numerical knee model of a cadaveric knee was developed and was validated against experimental measurements on that same knee. Good agreement was found among the numerical and experimental results. This study showed that, even if a medial UKA is well-aligned with normal soft tissue tension and with correct thickness of the tibia component, it induces a stiffness modification in the joint that alters the load distribution between the medial and lateral compartments, the bone stress and the ligament strain potentially leading to an osteoarthritic progression.