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Updated: May 2, 2026

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
Published on: April 11, 2018
Load sharing and ligament strains in balanced, overstuffed and understuffed UKA. A validated finite element analysis
Bernardo Innocenti1, Ömer Faruk Bilgen2, Luc Labey3
1European Centre for Knee Research, Smith&Nephew, Leuven, Belgium; BEAMS Department, Université Libre de Bruxelles, Brussels, Belgium.
Abstract:
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.
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