Polyethylene wear of dual mobility cups: a comparative analysis based on patient-specific finite element modeling.

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Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_AB159969BBE7
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Polyethylene wear of dual mobility cups: a comparative analysis based on patient-specific finite element modeling.
Journal
International orthopaedics
Author(s)
Wegrzyn J., Antoniadis A., Sarshari E., Boubat M., Terrier A.
ISSN
1432-5195 (Electronic)
ISSN-L
0341-2695
Publication state
Published
Issued date
04/2022
Peer-reviewed
Oui
Volume
46
Number
4
Pages
779-787
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Concerns remain about potential increased wear with dual mobility cups related to the multiple articulations involved in this specific design of implant. This finite element analysis study aimed to compare polyethylene (PE) wear between dual mobility cup and conventional acetabular component, and between the use of conventional ultra-high molecular weight PE (UHMWPE) and highly cross-linked PE (XPLE).
Patient-specific finite element modeling was developed for 15 patients undergoing primary total hip arthroplasty (THA). Five acetabular components were 3D modeled and compared in THA constructs replicating existing implants: a dual mobility cup with a 22.2-mm-diameter femoral head against UHMWPE or XLPE (DM22PE or DM22XL), a conventional cup with a 22.2-mm-diameter femoral head against UHMWPE (SD22PE) and a conventional cup with a 32-mm-diameter femoral head against UHMWPE or XLPE (SD32PE or SD32XL).
DM22PE produced 4.6 times and 5.1 times more volumetric wear than SD32XL and DM22XL (p < 0.0001, Cohen's d = 6.97 and 7.11; respectively). However, even if significant, the differences in volumetric wear between DM22XL and SD32XL as well as between DM22PE and SD22PE or SD32PE were small according to their effect size (p < 0.0001, Cohen's |d|= 0.48 to 0.65) and could be therefore considered as clinically negligible.
When using XLPE instead of UHMWPE, dual mobility cup with a 22.2-mm-diameter femoral head produced a similar amount of volumetric wear than conventional acetabular component with a 32-mm-diameter femoral head against XLPE. Therefore, XLPE is advocated in dual mobility cup to improve its wear performance.
Keywords
Orthopedics and Sports Medicine, Surgery, Dual mobility cup, Highly cross-linked polyethylene, Patient-specific modeling, Polyethylene mobile component, Polyethylene wear
Pubmed
Web of science
Open Access
Yes
Funding(s)
University of Lausanne
Create date
13/01/2022 15:01
Last modification date
21/11/2022 8:23
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