Analysing the long-term results of using and those of survival terms for unicompartmental knee arthroplasty

Abstract

The results of long-term follow-up survival of Oxford III (Biomet) design unicompartmental implant poorly studied since this effective method had been implemented in practice. We prospectively studied and analyzed the long-term outcome of 400 Oxford III (Biomet) unicompartmental implants from 320 patients with the mean age of 69 years (48 to 82) at the time of surgery. Average follow-up was 9.3 years (5 to 15). When analyzing the fifteen-year longterm results of arthroplasty Knee Society score significantly increased from 56.2 (41 to 93) before surgery to 88.6 (61 to 97) (p = 0.036) after surgery, and the functional parameters – from 59.2 (45 to 94) to 88.2 (55 to 98) (p = 0.023), respectively; the average score of Oxford Knee score system improved from the average of 25.8 points (12 to 39) to 40.1 points (28 to 54). Revision arthroplasty was performed in 21 patients (5.25%). Five patients underwent total knee arthroplasty. Minimally invasive unicompartmental arthroplasty using Oxford III (Biomet) design showed satisfactory long-term clinical results.