Strength analysis of hip joint replacement revision implant

Abstract

The subject of the article is the evaluation of the strength of revision implants made of \ntitanium or tantalum alloy, used during bone reconstruction of a hip joint while potentially \nusing additional stabilizing screws, necessary due to significant bone loss. The article provides \na preliminary strength analysis of implants, indispensable for further evaluation of strength \nlimitations due to the risk of implant damage depending on the structure and number of \nadditional screw holes. In the human locomotor system, the hip joint is the joint with the \nmost load, hence the main problem is to establish an adequate load model which ought to be \nassumed for the needs of implant strength analysis. It is found necessary to perform a short, \nanalytical review of the existing hip joint load models from the point of view of choosing \nthe proper one, considering evaluation of implant strength by means of numerical studies \nusing FEM. Differences in the implant load distribution depending on the used material are \nshown.