| Issue |
SICOT-J
Volume 7, 2021
|
|
|---|---|---|
| Article Number | 58 | |
| Number of page(s) | 5 | |
| Section | Hip | |
| DOI | https://doi.org/10.1051/sicotj/2021061 | |
| Published online | 19 November 2021 | |
Original Article
Similar stress repartition for a standard uncemented collared femoral stem versus a shortened collared femoral stem
1
Department of Orthopaedic surgery and Sports Medicine, Croix-Rousse Hospital, Lyon University Hospital, 103 grande rue de la Croix Rousse, 69004, Lyon, France
2
Univ Lyon, Claude Bernard Lyon 1 University, IFSTTAR, LBMC UMR_T9406, 69622 Lyon, France
3
Sydney Orthopaedic Research Institute, University of Notre Dame Australia, Hornsby and Ku-Ring Hospital, NSW 2067, Sydney, Australia
4
LIBM – EA 7424, Interuniversity Laboratory of Biology of Mobility, Claude Bernard Lyon 1 University, 69003 Lyon, France
5
Department of Orthopaedic Surgery, Clinique Saint-Georges, 2 Av. de Rimiez, 06105 Nice, France
* Corresponding author: cecile-batailler@hotmail.fr
Received:
31
August
2021
Accepted:
5
November
2021
Introduction: The design of uncemented femoral stems for use in total hip arthroplasty has evolved. Several uncemented short stems have been developed with different bone fixations, shapes, or stem lengths. The literature analyzing the biomechanical performance of short to standard stem lengths is limited. The aim was to compare the stress repartition on a standard uncemented stem and a shortened uncemented femoral stem with the same design features. Material and methods: This finite element analysis assessed the stress repartition on two femoral components with the same design (uncemented, collared, proximal trapezoidal cross-section, and a tapered quadrangular distal stem) but with two different lengths. The shortened stem was shorter by 40 mm compared to the standard stem. The stress repartition was analysed according to the Von Mises criterion. Results: The stress repartition was similar for the standard and shorter stem without significant difference (p = 0.94). The mean Von Mises stress was 58.1 MPa [0.2; 154.1] for the standard stem and 57.2 MPa [0.03; 160.2] for the short stem. The distal part of the standard stem, which was removed in the short stem, had mean stress of 3.7 MPa [0.2; 7.0]. Conclusion: The finite element analysis found similar stress repartitions between a standard uncemented collared stem and a short, collared stem with the same design. A clinical study assessing the clinical outcomes and the bone remodelling with a collared short stem would be interesting to confirm these first promising results.
Key words: Total hip arthroplasty / Short stem / Uncemented stem / Finite element analysis / Stress repartition
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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