Murray D W, Goodfellow J W, O'Connor J J
Nuffield Orthopaedic Centre, Oxford, England.
J Bone Joint Surg Br. 1998 Nov;80(6):983-9. doi: 10.1302/0301-620x.80b6.8177.
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 arthroplasty using fully congruous mobile polyethylene bearings. At review, 34 knees were in patients who had died and 109 were in those who were still living. The mean elapsed 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% (95% CI 93% to 100%). 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 and not significantly different from the best rates for total knee replacement.
检索研究表明，使用完全匹配的半月板轴承可减少膝关节置换术中的磨损。我们报告了143例患有前内侧骨关节炎且前交叉韧带正常的膝关节，采用完全匹配的活动聚乙烯轴承进行单髁关节置换术的结果。复查时，34例膝关节患者已死亡，109例患者仍在世。自手术以来的平均时间为7.6年（最长13.8年）。除1例膝关节外，我们确定了所有膝关节的状况。共进行了5次翻修手术，10年时的累积假体生存率（33例膝关节有风险）为98%（95%可信区间93%至100%）。将失访的膝关节视为失败，“最坏情况”生存率为97%。没有失败是由于聚乙烯磨损或胫骨部件无菌性松动。一个在4年时脱位的轴承通过闭合手法复位。10年生存率是单髁关节置换术报告中最好的，与全膝关节置换术的最佳率无显著差异。
