Yamakado Kotaro, Worland Richard L, Jessup Douglas E, Diaz-Borjon Efrain, Pinilla Roque
Advanced Orthopaedic Centers, Health Medical Center, Richmond, VA 23294, USA.
J Arthroplasty. 2003 Aug;18(5):570-4. doi: 10.1016/s0883-5403(03)00158-x.
Posteromedial subluxation has been reported as a mode of failure with flat-on-flat articular geometry. Medical records were reviewed to find patients who developed progressive subluxation of the femur. From a consecutive series of 2,773 primary anatomically graduated components (AGC) knees, 6 patients developed progressive posterior subluxation of the femur. The mean interval between the index total knee arthroplasty (TKA) and the diagnosis of subluxation was 4.8 years. Five cases were revised at an average of 6.2 years after index TKA. Tightness of the posterior cruciate ligament (PCL) was observed in all revised cases. Progressive posterior subluxation is a rare complication after AGC knees. It is believed that the primary factor causing progressive subluxation is tightness of the PCL. The PCL should be recessed if PCL tightness is seen at surgery.
后内侧半脱位已被报道为平面关节几何形状的一种失效模式。回顾病历以寻找发生股骨渐进性半脱位的患者。在连续的2773例初次解剖型渐变组件（AGC）膝关节中，有6例发生了股骨渐进性后脱位。初次全膝关节置换术（TKA）至半脱位诊断的平均间隔时间为4.8年。5例在初次TKA后平均6.2年进行了翻修。所有翻修病例均观察到后交叉韧带（PCL）紧张。渐进性后脱位是AGC膝关节置换术后罕见的并发症。据信，导致渐进性半脱位的主要因素是PCL紧张。如果在手术中发现PCL紧张，应将PCL recessed（此处原文可能有误，推测是“released”，即“松解”）。
