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Pre-clinical analysis of an acetabular cup with improved in-vivo stability and integrity

By Alexander Dickinson, Martin Browne, Jonathan Jeffers and Andrew Taylor

Abstract

A finite element analysis study was conducted to produce a ceramic bearing modular acetabular cup prosthesis design with reduced wall thickness, allowing a larger diameter bearing to be used reducing dislocation risk but without compromising bone conservation. In addition to geometric design, pre-assembly of the modular components was considered, so that the integrity of the cup in-vivo would be maintained, potentially reducing fracture risk and the incidence of squeaking. The result was a design with 4mm larger bearing diameter but 20% lower peak ceramic stress than current technology, and an assembly technique predicted to maintain implant integrity in the presence of dimensional variation from manufacturing. Such a design would represent an improvement in stability and integrity in-vivo over current technology, and a necessary improvement in prosthesis design

Topics: Q1
Publisher: Trans Tech
Year: 2008
OAI identifier: oai:eprints.soton.ac.uk:143437
Provided by: e-Prints Soton
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