Design of titanium uncemented femoral stems for hip prosthesis suitable for the Colombian young adult population

Abstract

The increase of revision surgeries in hip replacement procedure in Colombian young adult population can be addressed by a new design of femoral stem that reduces stress shielding. A new femoral stem was designed using topology optimization as a design aid to reduce the mass in the femoral stem and its overall stiffness, combined with the theoretical, computational, and experimental assessment of the new design that complies with a static and fatigue safety factor greater than one. The new femoral stem design can be used as a design tool to reduce the number of revision surgeries caused by stress shielding.

Keywords:

• Femoral stem
• axial fatigue
• stress shielding
• total hip arthroplasty

Acknowledgments

Authors thank the Mechanical Engineering program, the Human Centered Design (HCD) research group, the Energy, Materials, and Environment (GEMA) research group of Universidad de La Sabana for providing computational facilities, software, and laboratories to carry out this work. Authors thank the Mechanical Engineering program and “Centro Integrado de Materiales y Manufactura” CIMM of Universidad del Norte for providing the laboratories to carry out this work. A special thanks to Clinica Universidad de La Sabana.

Disclosure Statement

Authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Authors’ Contributions

Conceptualization, I.L; methodology, I.L; software, I.L, M.J, J.E; validation, I.L; formal analysis, I.L; investigation, I.L, M.J, J.E, J.O; resources, I.L, M.J, J.E, J.O, H.Z.; data curation, I.L; writing—original draft preparation, I.L.; writing—review and editing, I.L, M.J, J.E, J.O, H.Z; visualization, I.L.; supervision, M.J, J.E.; project administration, M.J, J.E.; funding acquisition, M.J, J.E, J.O . All authors have read and agreed to the published version of the manuscript.

Additional information

Funding

This research was funded by the General Research Directorate of Universidad de La Sabana through project ING-265-2020.