Two knees with a mobile-bearing prosthesis required a reoperation: one had an early reision because of bearing dislocation and another required conersion to an arthrodesis to treat a deep infection.

• 两名使用活动轴承假体的膝关节需要再次手术：一个因轴承脱位而需要早期翻修，另一个因深部感染而进行关节融合。