Department of Orthopedic Surgery, Pusan National University School of Medicine, Seo-gu, Busan, Korea.
J Arthroplasty. 2010 Jun;25(4):660.e11-3. doi: 10.1016/j.arth.2009.06.014. Epub 2009 Aug 13.
We report one case of loosening of the locking bolt in the stem-condyle junction of a constrained modular femoral component in revision total knee arthroplasty. Early detection of loosening of the locking bolt was possible using reconstructed view of computerized tomography scans before complete disengagement and radiographic loosening of the stemmed femoral component. When using the Total Condyle III femoral component with a stem extension, surgeons should keep in mind that stress concentration at the stem-condyle junction can result in failure of the locking bolt although it is rare and that loosening or disengagement of the locking bolt may be a sign of a loose stemmed femoral component.
我们报告了 1 例在翻修全膝关节置换术中，约束型模块化股骨组件的干骺端-髁间连接锁螺栓松动的病例。通过对计算机断层扫描重建图像的早期检测，在带柄股骨组件完全脱离和放射学松动之前，就有可能发现锁螺栓松动。在使用带柄延长干的 Total Condyle III 股骨组件时，外科医生应牢记，尽管这种情况很少见，但干骺端-髁间连接处的应力集中可导致锁螺栓失效，而且锁螺栓松动或脱离可能是带柄股骨组件松动的迹象。
