Load Sharing and Ligament Strains in Balanced, Overstuffed and Understuffed UKA. A Validated Finite Element Analysis

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• 作者：Bernardo Innocenti ; PhD^a ; ^b ; ; Ö ; mer Faruk Bilgen ; MD^c ; Luc Labey ; PhD^a ; G. Harry van Lenthe ; PhD^d ; Jos Vander Sloten ; PhD^d ; Fabio Catani ; MD^e
• 关键词：UKA ; overstuffing ; understuffing ; tibial stress ; collateral ligament strain
• 刊名：The Journal of Arthroplasty
• 出版年：July 2014
• 年：2014
• 卷：29
• 期：7
• 页码：1491-1498
• 全文大小：953 K

文摘

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.