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Technical Journal, Vol. 19 No. 4, 2025.

Original scientific paper

https://doi.org/10.31803/tg-20240426123331

A Comparative Structural Analysis of Total Hip Arthroplasty Designs

Elmedin Mešić orcid id orcid.org/0000-0002-3695-416X ; University of Sarajevo - Faculty of Mechanical Engineering, Vilsonovo šetalište 9, 71000 Sarajevo, Bosnia and Herzegovina *
Adela Zenkić orcid id orcid.org/0009-0000-3288-1576 ; NewCold Metal Construction, Žabljak bb, 74230 Usora, Bosnia and Herzegovina
Adis J. Muminović orcid id orcid.org/0000-0002-1419-2977 ; University of Sarajevo - Faculty of Mechanical Engineering, Vilsonovo šetalište 9, 71000 Sarajevo, Bosnia and Herzegovina
Nedim Pervan orcid id orcid.org/0000-0001-7366-202X ; University of Sarajevo - Faculty of Mechanical Engineering, Vilsonovo šetalište 9, 71000 Sarajevo, Bosnia and Herzegovina

* Corresponding author.

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Abstract

Structural analysis of two designs of total hip endoprosthesis was conducted with an emphasis on verifying stress conditions and displacement fields on the components and femur under loads typical for human gait. CAD (Computer Aided Design) models of a conventional endoprosthesis (Endoprosthesis 1) and a more modern solution (Endoprosthesis 2) were created using the CATIA (Computer Aided Three-dimensional Interactive Application) CAD/CAE (Computer Aided Engineering) system, based on which corresponding FEM (Finite Element Method) models were formed. By comparing the obtained results, it was found that a more uniform stress-strain pattern occurs on most components of Endoprosthesis 2 compared to Endoprosthesis 1. Additionally, the analysis of von Mises stresses and displacements at characteristic points of the femur showed a balanced distribution of stress and displacement. However, higher contact stresses between the stem and femur occur with Endoprosthesis 2, reducing the possibility of stress shielding due to the specifics of its design.

Keywords

CAD model; FEM model; stress shielding; structural analysis; total hip endoprosthesis; von Mises stress

Hrčak ID:

335252

URI

https://hrcak.srce.hr/335252

Publication date:

15.12.2025.

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