Pearse A J, Hooper G J, Rothwell A, Frampton C
University of Otago, Christchurch,New Zealand.
J Bone Joint Surg Br. 2010 Apr;92(4):508-12. doi: 10.1302/0301-620X.92B4.22659.
We reviewed the rate of revision of unicompartmental knee replacements (UKR) from the New Zealand Joint Registry between 1999 and 2008. There were 4284 UKRs, of which 236 required revision, 205 to a total knee replacement (U2T) and 31 to a further unicompartmental knee replacement (U2U). We used these data to establish whether the survival and functional outcome for revised UKRs were comparable with those of primary total knee replacement (TKR). The rate of revision for the U2T cohort was four times higher than that for a primary TKR (1.97 vs 0.48; p < 0.05). The mean Oxford Knee Score was also significantly worse in the U2T group than that of the primary TKR group (30.02 vs 37.16; p < 0.01). The rate of revision for conversion of a failed UKR to a further UKR (U2U cohort) was 13 times higher than that for a primary TKR. The poor outcome of a UKR converted to a primary TKR compared with a primary TKR should contra-indicate the use of a UKR as a more conservative procedure in the younger patient.
我们回顾了1999年至2008年新西兰关节登记处单髁膝关节置换术（UKR）的翻修率。共有4284例UKR，其中236例需要翻修，205例翻修为全膝关节置换术（U2T），31例翻修为再次单髁膝关节置换术（U2U）。我们利用这些数据来确定翻修后的UKR的生存率和功能结果是否与初次全膝关节置换术（TKR）相当。U2T队列的翻修率比初次TKR高四倍（1.97对0.48；p<0.05）。U2T组的平均牛津膝关节评分也明显低于初次TKR组（30.02对37.16；p<0.01）。失败的UKR转换为再次UKR（U2U队列）的翻修率比初次TKR高13倍。与初次TKR相比，UKR转换为初次TKR的不良结果应表明，在年轻患者中，不应将UKR作为一种更保守的手术方法。
