Flury A, et al. - Given that poor implant positioning may result in early failure of unicompartmental knee arthroplasty, researchers sought to report the accuracy of component positioning. In addition, they reported the midterm clinical, functional and radiological outcomes following patient-specific instrumented (PSI) unicompartmental knee arthroplasty (UKA) in a total of 115 patients. After a mean follow-up of 55 months, 92% survival rate of PSI-UKA was observed with the complication and failure rate of 13% and eight percent, respectively. As per findings, PSI could lead to the achievement of excellent accuracy regarding component placement in UKA. However, the data indicate no superiority of the PSI system to conventional UKA implantation methods despite excellent survivorship and clinical outcomes.