Midterm results of Oxford phase 3 unicondylar knee arthroplasty for medial osteoarthritis

We evaluated midterm results of Oxford phase 3 unicondylar knee arthroplasty (UKA) in patients with medial osteoarthritis. Twenty-seven patients (24 females, 3 males; mean age 57 years; range 47 to 73 years) underwent Oxford phase 3 UKA with the diagnosis of medial knee osteoarthritis. All patients had primary osteoarthritis but one with spontaneous osteonecrosis. Nine knees were Ahlback grade 2, and 18 knees were grade 3. All femoral and tibial components were cemented and mobile tibial polyethylene inserts were used in all the patients. Pre- and postoperative evaluations were made using the Knee Society clinical rating system. The mean follow-up was 28 months (range 24 to 36 months). Compared to the preoperative values, significant improvements were obtained in the following at final follow-up (p