Research article

Experimental and analytical validation of a modular acetabular prosthesis in total hip arthroplasty

Francisco Romero¹ , Farid Amirouche^1,2 , Luke Aram¹ and Mark H Gonzalez^1,2

¹  Department of Mechanical Engineering, Biomechanics Laboratory, University of Illinois at Chicago, 842 W. Taylor Street, Room 1039, Chicago, Illinois 60607, USA

²  Department of Orthopaedic Surgery, University of Illinois at Chicago, 1801 W. Taylor Street, Chicago, Illinois, USA

author email corresponding author email

Journal of Orthopaedic Surgery and Research 2007, 2:7doi:10.1186/1749-799X-2-7

Published:	16 May 2007

Abstract

A finite element model has been developed to predict in vivo micro motion between a modular acetabular cup and liner after cement less total hip arthroplasty. The purpose of this study is to experimentally validate the model. Six LVDT sensors were used to monitor the micromotion of the liner when subjected to loading conditions ranging from 250 N to 5000 N. Deformations at points of interest for both the experiment and FEM were compared. Results of the FEM with different coefficient of friction between the liner and the cup were investigated to correlate with the experimental results.