When performing total knee arthroplasty with an image-free computer-navigated system, good component and lower limb alignment can be achieved with severe varus knees, according to results of this study.
Between 2008 and 2009 researchers performed computer-navigated total knee arthroplasty (TKA) using an image-free computer navigation system (OrthoPilot, B. Braun Aesculap, Tuttlingen, Germany). Of the 98 knees in the study, patients with varus deformity ≥20° were placed in the severe varus group, while patients with varus deformity <20° were in the varus knee group. Component angles and mechanical axis were evaluated postoperatively with weight bearing full-length standing radiographs.
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