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Deformation of metal-backed acetabular components and the impact of liner thickness in a cadaveric model
Journal article   Open access   Peer reviewed

Deformation of metal-backed acetabular components and the impact of liner thickness in a cadaveric model

David Markel, Judd Day, Ryan Siskey, Imants Liepins, Steven Kurtz and Kevin Ong
International orthopaedics, v 35(8), pp 1131-1137
13 Jul 2010
DOI: https://doi.org/10.1007/s00264-010-1077-6
PMID: 20625898
Featured in Collection :   UN Sustainable Development Goals @ Drexel
url
https://doi.org/10.1007/s00264-010-1077-6View
Published, Version of Record (VoR)Open Access (License Unspecified),  Open

Abstract

Original Paper
Shell deformation of resurfacing and all-metal modular cups following press-fit implantation has been reported, but not for conventional metal-backed cups with polyethylene liners. The deformation of acetabular components with historical and thin polyethylene inserts after press-fit insertion was evaluated using a cadaveric model. All shells and liners deformed upon implantation. Following joint loading, shell pinch decreased from 0.32 to 0.22 mm ( p  = 0.019) and from 0.29 to 0.13 mm ( p  = 0.003) for the thin and thick liner groups, respectively. Liner pinch also decreased from 0.17 to 0.04 mm ( p  = 0.031) and from 0.06 to 0 mm ( p  = 0.103) for the thin and thick liner groups, respectively. There were no significant differences between the thin and thick liners. Liner deformation was influenced by the initial shell deformation and donor bone quality. Shell and liner pinch decreased following joint loading, suggesting a settling in effect.

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27 citations in Web of Science
35 citations in Scopus

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#3 Good Health and Well-Being

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Web of Science research areas
Orthopedics
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