Unicompartmental knee arthroplasty: past, present, and future.

Unicompartmental knee arthroplasty (UKA) has a more than 30-year history in the treatment of arthritis of one compartment of the tibiofemoral joint. Despite early negative reports, the procedure has evolved into are liable and safe treatment. Successful outcomes withUKA require proper patient selection, meticulous surgical technique, and avoidance of deformity overcorrection.This procedure is indicated for patients with localized pain, preserved range of motion, and radiographically isolated tibiofemoral disease. UKA can provide more range of motion and improved patient satisfaction relative to total knee arthroplasty with comparable midterm longevity.