Increased valgus laxity in flexion with greater tibial resection depth following total knee arthroplasty

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
E Sappey-MarinierS Lustig

Abstract

Soft tissue balancing is of central importance to outcome following total knee arthroplasty (TKA). However, there are lack of data analysing the effect of tibial bone cut thickness on valgus laxity. A cadaveric study was undertaken to assess the biomechanical consequences of tibial resection depth on through range knee joint valgus stability. We aimed to establish a maximum tibial resection depth, beyond which medial collateral ligament balancing becomes challenging, and a constrained implant should be considered. Eleven cadaveric specimens were included for analysis. The biomechanical effects of increasing tibial resection were studied, with bone cuts made at 6, 10, 14, 18 and 24 mm from the lateral tibial articular surface. A computer navigation system was used to perform the tibial resection and to measure the valgus laxity resulting from a torque of 10 Nm. Measurements were taken in four knee positions: 0° or extension, 30°, 60° and 90° of flexion. Intra-observer reliability was assessed. A minimum sample size of eight cadavers was necessary. Statistical analysis was performed using a nonparametric Spearman's ranking correlation matrix at the different stages: in extension, at 30°, 60° and 90° of knee flexion. Significance ...Continue Reading

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Apr 23, 2017·Journal of Orthopaedic Surgery and Research·Dong RenPengcheng Wang

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Citations

Sep 5, 2020·European Journal of Orthopaedic Surgery & Traumatology : Orthopédie Traumatologie·Carlos Daniel Novoa-ParraA Lizaur-Utrilla
Apr 5, 2021·SICOT-J·Sébastien LustigCécile Batailler

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