抄録
Ten consecutive unicompartmental knee arthroplasties (UKA) in 10 patients (mean age 78.9 years, range 69-89 years) were studied retrospectively. Eight knees were diagnosed with medial osteoarthritis, and two had osteonecrosis of the medial femoral condyle. The mean follow up period was 8.4 months (range 2-17 months). M/G® Unicompartmental Knee System (Zimmer, Inc. Warsaw, IN, USA) were used for all patients. The mean JOA score improved from 56 points to 92.5 points at the final follow-up. The mean preoperative range of motion (ROM) was 133.5 degrees, and no reductions were observed postoperatively. Radiographically, preoperative varus alignments (mean FTA 182.3 degree) were improved to the normal range of alignment (mean FTA 174.7 degree). There were no surgical complications. The amount of bleeding at surgery and duration of hospital stay were much less in UKA than in similar cases of TKA. These findings suggest that the less invasive UKA provided early recovery and good function. We concluded that UKA was quite useful, especially for these aged patients with unicompartmental osteoarthritis or necrosis.
