Preprint version. Published in Journal of Bone and Joint Surgery - British, Volume 91-B, Issue 1, January 1, 2009, pages 124-130. Reproduced with permission and copyright © 2009 of the British Editorial Society of Bone and Joint Surgery. The definitive version is available at http://dx.doi.org/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 middiaphysis 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.
Biomedical Engineering and Bioengineering