Journal of Theoretical
and Applied Mechanics
57, 1, pp. 235-248, Warsaw 2019
DOI: 10.15632/jtam-pl.57.1.235

Strength analysis of hip joint replacement revision implant

Paweł Skowronek, Krzysztof Twardoch, Piotr Skawiński, Marcel Żołnierz
The subject of the article is the evaluation of the strength of revision implants made of
titanium or tantalum alloy, used during bone reconstruction of a hip joint while potentially
using additional stabilizing screws, necessary due to significant bone loss. The article provides
a preliminary strength analysis of implants, indispensable for further evaluation of strength
limitations due to the risk of implant damage depending on the structure and number of
additional screw holes. In the human locomotor system, the hip joint is the joint with the
most load, hence the main problem is to establish an adequate load model which ought to be
assumed for the needs of implant strength analysis. It is found necessary to perform a short,
analytical review of the existing hip joint load models from the point of view of choosing
the proper one, considering evaluation of implant strength by means of numerical studies
using FEM. Differences in the implant load distribution depending on the used material are
shown.
Keywords: implant, implant strength, prosthesis, hip joint, material loss

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