Li P L, Ingle P J, Dowell J K
Broomfield Hospital, Chelmsford, England, UK.
J Bone Joint Surg Br. 1996 Sep;78(5):809-11.
The complete removal of the cement mantle at revision arthroplasty can be extremely difficult. Some authors advise a 'cement-within-cement' revision technique in which a new layer of cement is applied to the old before insertion of the femoral component. We could find no long-term clinical data regarding the success of this procedure. In a simple biomechanical study, we examined the strength of the cement-to-cement interface in conditions likely to prevail in vivo. We found that the presence of a thin layer of blood and marrow debris at the interface weakened the cement-to-cement bond by 80% to 85%. These biomechanical findings and additional photomicrographic evidence do not support the practice of cement-within-cement revision arthroplasty.
在翻修关节成形术中完全去除骨水泥套可能极其困难。一些作者建议采用“水泥内水泥”翻修技术，即在插入股骨组件之前，在旧的骨水泥上涂抹一层新的骨水泥。我们找不到关于该手术成功率的长期临床数据。在一项简单的生物力学研究中，我们在可能在体内存在的条件下检查了骨水泥与骨水泥界面的强度。我们发现，界面处存在一薄层血液和骨髓碎片会使骨水泥与骨水泥的结合力减弱80%至85%。这些生物力学研究结果以及其他显微照片证据并不支持“水泥内水泥”翻修关节成形术的做法。
