A ten-year survival study.
Murray D.W., Goodfelow J.W., O'Connor J.J. From the Nuffield Orthopedic Centre, Oxford, England
 

Abstract — Retrieval studies have shown that the use of fully congruent meniscal bearings reduces wear in knee replacements. We report the outcome of 143 knees with anteromedial osteoarthritis and normal anterior cruciate ligaments treated by unicompartmental arhroplasty [partial knee resurfacing] using fully congruous mobile polyethylene bearings. We reviewed 109 patients, mean time since operation was 7.6 years (maximum 13.8). We established the status of all but one knee. There had been five revision operations giving a cumulative prosthetic survival rate at ten years (33 knees at risk) of 98%. Considering the knee lost to follow-up as a failure, the 'worst-case' survival rate was 97%. No failures were due to polyethylene wear or aseptic loosening of the tibial component. One bearing which dislocated at four years was reduced by closed manipulation. The ten-year survival rate is the best of those reported for unicompartmental arthroplasty [partial knee resurfacing] and not significantly different from the best rates for total knee replacement.
 
The Journal of Bone and Joint Surgery (Br),1998:no 80-B, pag 983-9