Topological optimization of hip spacer reinforcement

Abdelhafid Mallek; Abdulmohsen Albedah; Mohammed Mokhtar Bouziane; Bel Abbes Bachir Bouiadjra; Sohail M A K Mohammed; Richie H S Gill

doi:10.1016/j.jmbbm.2024.106763

Topological optimization of hip spacer reinforcement

J Mech Behav Biomed Mater. 2024 Dec:160:106763. doi: 10.1016/j.jmbbm.2024.106763. Epub 2024 Sep 30.

Authors

Abdelhafid Mallek¹, Abdulmohsen Albedah², Mohammed Mokhtar Bouziane³, Bel Abbes Bachir Bouiadjra⁴, Sohail M A K Mohammed⁵, Richie H S Gill⁶

Affiliations

¹ LMPM, Department of Mechanical Engineering, University of Sidi Bel Abbes, BP 89, Cité Ben M'hidi, Sidi Bel Abbes, 22000, Algeria.
² Mechanical Engineering Department, College of Engineering King Saud University, Riyadh, Saudi Arabia; King Salman Center for Disability Research, Riyadh, 11614, Saudi Arabia. Electronic address: [email protected].
³ LMPM, Department of Mechanical Engineering, University of Sidi Bel Abbes, BP 89, Cité Ben M'hidi, Sidi Bel Abbes, 22000, Algeria; Department of Mechanical Engineering, Faculty of Technology, University of Mascara, BP 305 Route de Mamounia, Mascara 29000, Algeria.
⁴ LMPM, Department of Mechanical Engineering, University of Sidi Bel Abbes, BP 89, Cité Ben M'hidi, Sidi Bel Abbes, 22000, Algeria; Mechanical Engineering Department, College of Engineering King Saud University, Riyadh, Saudi Arabia; King Salman Center for Disability Research, Riyadh, 11614, Saudi Arabia.
⁵ Department of Mechanical and Materials Engineering, Florida International University, 10555 West Flagler Street, Miami, FL 33174, USA.
⁶ Centre for Orthopedic Biomechanics, Department of Mechanical Engineering, University of Bath, Bath, United Kingdom.

PMID: 39369618
DOI: 10.1016/j.jmbbm.2024.106763

Abstract

The use of an antibiotic-enriched hip spacer represents the optimal treatment for periprosthetic joint infections (PJI). The addition of reinforcement significantly enhances its mechanical properties. Employing the explicit method enables accurate prediction of the mechanical behavior of both the spacer and its reinforcement. Topological optimization of the reinforcement emerges as the most effective strategy to prevent bone demineralization, enhance antibiotic diffusion, and improve spacer resistance. The objective of this study is to conduct topological optimization of a validated numerical model of a reinforced hip spacer and to select, from the obtained topologies, the one that best improves mechanical properties and prevents stress shielding while minimizing volume. The results indicate that an 8 mm thick titanium reinforcement, optimized to 70% of its original volume, proves to be the most effective choice.

Keywords: Hip spacer; Smeared crack; Stress shielding; topological optimization.

MeSH terms

Anti-Bacterial Agents / chemistry
Hip Prosthesis
Materials Testing
Mechanical Phenomena*
Stress, Mechanical
Titanium / chemistry

Substances

Titanium
Anti-Bacterial Agents