Experimental evaluation of new concepts in hip arthroplasty.

摘要: In this thesis we evaluated two different hip arthroplasty concepts trough in vitro studies and numerical analyses. The cortical strains the femoral neck area were increased by 10 to 15 % after insertion of a resurfacing component compared values intact femur, shown an study on human cadaver femurs. There is risk fracture arthroplasty. An increase limited, cannot alone explain these fractures. Together with patient specific surgical factors, however, strain can contribute fracture. showed that increasing length combination retroversion or reduced shaft angle standard cementless stem does not compromise stability stem. pattern proximal femur significantly at several measuring sites when version altered. However, changes probably too small have clinical relevance. validation subject finite element analysis able perform reasonable predictions stress shielding usage models be valuable supplement tests around Finally, case shows bone resorption implant caused extreme cases lead periprosthetic