The University of Southampton
University of Southampton Institutional Repository

The effects of glenoid component alignment variations on cement mantle stresses in total shoulder arthroplasty

The effects of glenoid component alignment variations on cement mantle stresses in total shoulder arthroplasty
The effects of glenoid component alignment variations on cement mantle stresses in total shoulder arthroplasty
Loosening of the glenoid component has been cited as the most frequent cause of patient dissatisfaction with total shoulder arthroplasty, and it has been demonstrated in clinical studies that misalignment of the prostheses can be a causative factor. Finite element analyses of five different glenoid component alignments (central, anteverted, retroverted, inferiorly inclined, and superiorly inclined) were conducted in order to predict changes in the survivability of the cement mantle surrounding the glenoid component. The potential for mechanical failure of the mantle in the centrally aligned implant, during unloaded abduction, was seen to be lower than for any other alignment. Normal bone outperformed simulated rheumatoid models in all cases. Retroversion was worse than anteversion, and superoinferior misalignment was worse than anteroposterior. The quality of the supporting bone stock was found to be particularly significant to cement survivability, more so than the occurrence of eccentric loading of the joint. Shear forces acting on the glenoid component were found to be more detrimental than axial forces, resulting in a greater likelihood of failure toward the extremes of motion. The study suggests that significant efforts should be made to align the glenoid component correctly and also to ensure suitably consistent support of the prosthesis within the bone.
1058-2746
668-675
Hopkins, Andrew R.
5a263770-2eeb-4c09-a6e0-1e7b54435d8f
Hansen, Ulrich N.
ae9c69ab-87a8-4435-b113-ee319579adef
Amis, Andrew A.
31e15d47-8b4e-4279-a73b-f70038f90d48
Emery, Roger
bc4e1ca5-b6fd-498d-b78a-d26059f36c7a
Hopkins, Andrew R.
5a263770-2eeb-4c09-a6e0-1e7b54435d8f
Hansen, Ulrich N.
ae9c69ab-87a8-4435-b113-ee319579adef
Amis, Andrew A.
31e15d47-8b4e-4279-a73b-f70038f90d48
Emery, Roger
bc4e1ca5-b6fd-498d-b78a-d26059f36c7a

Hopkins, Andrew R., Hansen, Ulrich N., Amis, Andrew A. and Emery, Roger (2004) The effects of glenoid component alignment variations on cement mantle stresses in total shoulder arthroplasty. Journal of Shoulder and Elbow Surgery, 13 (6), 668-675. (doi:10.1016/j.jse.2004.04.008).

Record type: Article

Abstract

Loosening of the glenoid component has been cited as the most frequent cause of patient dissatisfaction with total shoulder arthroplasty, and it has been demonstrated in clinical studies that misalignment of the prostheses can be a causative factor. Finite element analyses of five different glenoid component alignments (central, anteverted, retroverted, inferiorly inclined, and superiorly inclined) were conducted in order to predict changes in the survivability of the cement mantle surrounding the glenoid component. The potential for mechanical failure of the mantle in the centrally aligned implant, during unloaded abduction, was seen to be lower than for any other alignment. Normal bone outperformed simulated rheumatoid models in all cases. Retroversion was worse than anteversion, and superoinferior misalignment was worse than anteroposterior. The quality of the supporting bone stock was found to be particularly significant to cement survivability, more so than the occurrence of eccentric loading of the joint. Shear forces acting on the glenoid component were found to be more detrimental than axial forces, resulting in a greater likelihood of failure toward the extremes of motion. The study suggests that significant efforts should be made to align the glenoid component correctly and also to ensure suitably consistent support of the prosthesis within the bone.

This record has no associated files available for download.

More information

Published date: 2004

Identifiers

Local EPrints ID: 23689
URI: http://eprints.soton.ac.uk/id/eprint/23689
ISSN: 1058-2746
PURE UUID: 8f266c01-1f1e-4d97-aa03-3ebecb875302

Catalogue record

Date deposited: 23 Mar 2006
Last modified: 15 Mar 2024 06:49

Export record

Altmetrics

Contributors

Author: Andrew R. Hopkins
Author: Ulrich N. Hansen
Author: Andrew A. Amis
Author: Roger Emery

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.

×