A novel patient-specific instrument design can deliver robotic level accuracy in unicompartmental knee arthroplasty.

Background: A previous randomised controlled trial (RCT) by our group found that robotic assisted unicompartmental knee arthroplasty (UKA) surgery was significantly more accurate than conventional instrumentation. The aim of this study was to determine whether a low-cost novel PSI design could deliver the same level of accuracy as the robot in the same time efficient manner as conventional instruments.

Methods: Thirty patients undergoing medial UKA took part.