The University of Southampton
University of Southampton Institutional Repository

Performance of the resurfaced hip. Part 2: the influence of prosthesis stem design on remodelling and fracture of the femoral neck

Record type: Article

Hip resurfacing is a popular treatment for osteoarthritis in young, active patients. Previous studies have shown that occasional failures – femoral neck fracture and implant loosening, possibly associated with bone adaptation – are affected by prosthesis sizing and positioning, in addition to patient and surgical factors. With the aim of improving tolerance to surgical variation, finite element modelling was used to indicate the effects of prosthesis metaphyseal stem design on bone remodelling and femoral neck fracture, with a range of implant orientations. The analysis suggested that the intact femoral neck strength in trauma could be maintained across a wider range of varus–valgus orientations for short-stemmed and stemless prostheses. Furthermore, the extent of periprosthetic bone remodelling was lower for the short-stemmed implant, with slightly reduced stress shielding and considerably reduced densification around the stem, potentially preventing further progressive proximal stress shielding. The study suggests that a short-stemmed resurfacing head offers improved tolerance to misalignment and remodelling stimulus over traditional designs. While femoral neck fracture and implant loosening are multifactorial, biomechanical factors are of clear importance to the clinical outcome, so this may reduce the risk for patients at the edge of the indications for hip resurfacing, or shorten the surgical learning curve.

PDF Dickinson_2010_2.pdf - Accepted Manuscript
Download (622kB)

Citation

Dickinson, Alexander, Taylor, Andrew, Jeffers, Jonathan and Browne, Martin (2010) Performance of the resurfaced hip. Part 2: the influence of prosthesis stem design on remodelling and fracture of the femoral neck Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 224, pp. 841-851. (doi:10.1243/09544119JEIM680). (PMID:20839652).

More information

Published date: 2010
Keywords: hip resurfacing, finite element analysis, bone remodelling, neck fracture, prosthesis design

Identifiers

Local EPrints ID: 143433
URI: http://eprints.soton.ac.uk/id/eprint/143433
ISSN: 0954-4119
PURE UUID: 0a6face3-b3e8-40e2-ac7e-d370cbf38f58
ORCID for Alexander Dickinson: ORCID iD orcid.org/0000-0002-9647-1944
ORCID for Martin Browne: ORCID iD orcid.org/0000-0001-5184-050X

Catalogue record

Date deposited: 12 Apr 2010 08:31
Last modified: 18 Jul 2017 23:10

Export record

Altmetrics


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×