by Elizabeth Hofheinz, M.P.H., M.Ed. Researchers from Barnes-Jewish Hospital, Washington University School of Medicine in St. Louis, Missouri have undertaken a retrospective analysis of 253 primary fixed-bearing and mobile-bearing medial unicompartmental knee arthroplasties (UKAs). The study on these surgeries, which were performed by two high-volume fellowship-trained arthroplasty surgeons, was meant to determine implant survival and …