No radiological or clinical benefit of patient-specific vs standard instrumentation in TKA .
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Comparison between patient-specific instruments and conventional instruments and computer navigation in total knee arthroplasty: a randomized controlled trial
Knee Surg Sports Traumatol Arthrosc. 2015 Dec;23(12):3637-4581 patients scheduled for total knee arthroplasty were randomized to have the procedure completed using patient-specific instrumentation (PSI), computer navigation, or conventional instrumentation. The purpose of this study was to evaluate how groups compared regarding malalignment of the lower limb overall in the coronal plane, the femoral and tibial components in the coronal and sagittal planes, operative time, clinical outcome scores, and complications. The only significant differences that were observed were a significantly lower incidence of excessive malalignment (+/- 3-degree deviation) of the femoral component in the sagittal plane in the NAV group compared to the two others, and significantly longer operative time in the NAV group compared to the two others.
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