Deuel C R, Jamali A A, Stover S M, Hazelwood S J
Department of Orthopaedic Surgery, Univesity of California Davis Medical Center, Sacramento, California 95817, USA.
J Bone Joint Surg Br. 2009 Jan;91(1):124-30. doi: 10.1302/0301-620X.91B1.20789.
Bone surface strains were measured in cadaver femora during loading prior to and after resurfacing of the hip and total hip replacement using an uncemented, tapered femoral component. In vitro loading simulated the single-leg stance phase during walking. Strains were measured on the medial and the lateral sides of the proximal aspect and the mid-diaphysis of the femur. Bone surface strains following femoral resurfacing were similar to those in the native femur, except for proximal shear strains, which were significantly less than those in the native femur. Proximomedial strains following total hip replacement were significantly less than those in the native and the resurfaced femur. These results are consistent with previous clinical evidence of bone loss after total hip replacement, and provide support for claims of bone preservation after resurfacing arthroplasty of the hip.
在使用非骨水泥型锥形股骨假体进行髋关节表面置换和全髋关节置换前后，对尸体股骨在加载过程中的骨表面应变进行了测量。体外加载模拟了步行过程中的单腿站立阶段。在股骨近端和骨干中部的内侧和外侧测量应变。股骨表面置换后的骨表面应变与天然股骨相似，但近端剪切应变明显小于天然股骨。全髋关节置换后的近端内侧应变明显小于天然股骨和表面置换后的股骨。这些结果与先前全髋关节置换后骨丢失的临床证据一致，并为髋关节表面置换术后骨保留的说法提供了支持。
