Abstract
We prospectively reviewed a consecutive series of 101 patients with mobile bearing total knee replacement (TKR) and 72 patients with the fixed bearing cruciate retaining TKR. Patients were assessed for diagnoses, range of motion, pre- and post-operative Oxford knee scores and complications. In the mobile bearing group of 113 knees in 101 patients, 97 had minimum 10-year follow up. By ten years, 16 patients had died of unrelated causes. Mean Revised Oxford Knee score improved from 16 pre-operatively to 42 at last follow up. The mean range of flexion was 115 degrees (75 – 130). One patient dislocated the bearing and needed manipulation. One patient reported superficial infection which resolved with antibiotics. One patient had deep vein thrombosis and one had non-fatal pulmonary embolism. In the fixed bearing group, 89 TKR's were performed in 72 patients. The mean age was 71.9 years and the mean follow up was 12.1 (10–14.1) years. 19 patients died during this study period. The mean range of flexion was 111.2 (80–135) degrees of flexion at latest follow- up. There was an improvement in the mean Oxford knee score from 16.2 preoperatively, to 42.5 to date. One patient required revision surgery at 12 years for polyethylene wear. One patient developed deep infection 10 years after the primary procedure but declined revision surgery. At ten years no revisions were performed in either group. This series has highlighted excellent results with both fixed and mobile bearing CR knees with hundred percent survival at ten years.
