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Ashkanfar, A, Toh, SMS, English, R, Langton, DJ and Joyce, TJ (2024) The impact of femoral head size on the wear evolution at contacting surfaces of total hip prostheses: A finite element analysis. Journal of the Mechanical Behavior of Biomedical Materials, 153. pp. 1-8. ISSN 1751-6161
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The impact of femoral head size on the wear evolution at contacting surfaces of total hip prostheses A finite element analysis.pdf - Published Version Available under License Creative Commons Attribution. Download (4MB) | Preview |
Abstract
Total Hip Arthroplasty has been a revolutionary technique in restoring mobility to patients with damaged hip joints. The introduction of modular components of the hip prosthesis allowed for bespoke solutions based on the requirements of the patient. The femoral stem is designed with a conical trunnion to allow for assembly of different femoral head sizes based on surgical requirements. The femoral head diameters for a metal-on-polyethylene hip prosthesis have typically ranged between 22 mm and 36 mm and are typically manufactured using Cobalt-Chromium alloy. A smaller femoral head diameter is associated with lower wear of the polyethylene, however, there is a higher risk of dislocation. In this study, a finite element model of a standard commercial hip arthroplasty prosthesis was modelled with femoral head diameters ranging from 22 mm to 36 mm to investigate the wear evolution and material loss at both contacting surfaces (acetabular cup and femoral stem trunnion). The finite element model, coupled with a validated in-house wear algorithm modelled a human walking for 10 million steps. The results have shown that as the femoral head size increased, the amount of wear on all contacting surfaces increased. As the femoral head diameter increased from 22 mm to 36 mm, the highly cross-linked polyethylene (XLPE) volumetric wear increased by 61% from 98.6 mm3 to 159.5 mm3 while the femoral head taper surface volumetric wear increased by 21% from 4.18 mm3 to 4.95 mm3. This study has provided an insight into the amount of increased wear as the femoral head size increased which can highlight the life span of these prostheses in the human body.
| Item Type: | Article |
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| Uncontrolled Keywords: | Finite element modelling; Hip joint prosthesis; Polyethylene wear; Total hip arthroplasty; Wear modelling; 0903 Biomedical Engineering; 0912 Materials Engineering; 0913 Mechanical Engineering; Biomedical Engineering |
| Subjects: | R Medicine > RD Surgery T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Engineering |
| Publisher: | Elsevier |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 12 Mar 2024 09:28 |
| Last Modified: | 12 Mar 2024 09:30 |
| DOI or ID number: | 10.1016/j.jmbbm.2024.106474 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/22774 |
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