Escudier JC, et al. - A total of 106 patients who underwent medial UKA between January 2017 and March 2018 were involved by the experts to test the hypothesis that morphometric tibial tray (MTT) would improve implant positioning and subsequently clinical outcomes in comparison with symmetric tibial tray (STT). Implants of the STT group illustrated more external rotation and medial and posterior overhang > 3 mm but no variations for tibial bone coverage. In the MTT group, Global Knee Society Score (KSS), Knee injury and Osteoarthritis Outcome Score Short Form (KOOS SF), and EuroQoL 5-Dimensions 3-Levels (EQ5D3L) were higher. According to the multivariate analysis, MTT had a positive independent impact on the KSS, KOOS SF, and EQ5D3L. Therefore, in medial UKA, the use of an MTT allowed better implant positioning when reducing the rate of overhang and superior short-term clinical outcomes were observed in contrast with STT.