O2453 CEMENTLESS TOTAL KNEE REPLACEMENT – A PROSPECTIVE 12 TO 15 YEAR FOLLOW-UP STUDY

Abstract

Aim: The long-term results of Cementless Total Knee Replacements have been traditionally unsatisfactory owing to the problems of þxation of the Tibial component. The purpose of this study was to evaluate the long- term results of Cementless Ortholoc I Total Knee Replacement (Wright Medical, Arlington, TN). Patients & methods: Between June 1985 and Dec.1987, 164 patients underwent 187 cementless Ortholoc I TKAs. The Knee Society scoring system was used to assess patients both clinically and radiologically. Kaplan Meier Survivorship analysis was used to assess survival with all revisions and revisions for aseptic loosening alone as end points. Results: 68 patients (83 knees) were dead and 14 were lost. 82 patients (89 knees) were followed up at a mean of 159 months (145–181). Mean age was 71 years (range 35–87) and the majority was female. OA was the commonest indication for surgery. The mean BMI was 28(range 15–46). 42 patients had a high tibial osteotomy prior to their TKA. 13 knees have been revised, 6 of which for aseptic loosening. The Knee Society score at þnal follow-up was 85 (58–98). With any revision as end point the survival at 15 years was 92% and with revision for aseptic loosening as end point it was 96%. Conclusions: Our results with the Ortholoc I TKA has been excellent with a success rate of over 96% at a mean follow-up of nearly 13 years. We believe that the better þxation of the Tibial component is a major factor inßuencing the success of this cementless design of TKA