tailieunhanh - báo cáo hóa học:" Experimental and analytical validation of a modular acetabular prosthesis in total hip arthroplasty"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Experimental and analytical validation of a modular acetabular prosthesis in total hip arthroplasty | Journal of Orthopaedic Surgery and Research BioMed Central Open Access Experimental and analytical validation of a modular acetabular prosthesis in total hip arthroplasty Francisco Romero1 Farid Amirouche1 2 Luke Aram1 and Mark H Gonzalez 1 2 Address Department of Mechanical Engineering Biomechanics Laboratory University of Illinois at Chicago 842 Street Room 1039 Chicago Illinois 60607 USA and 2Department of Orthopaedic Surgery University of Illinois at Chicago 1801 W. Taylor Street Chicago Illinois USA Email Francisco Romero - Farid Amirouche - amirouch@ Luke Aram - larum@ Mark H Gonzalez - hand15@ Corresponding author Published 16 May 2007 Received 12 May 2006 Journal of Orthopaedic Surgery and Research 2007 2 7 doi 1749-799X-2-7 Accepted 16 May 2007 This article is available from http content 2 1 7 2007 Romero et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 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. Background Polyethylene wear particles generated from the acetabular liner of an acetabular cup are a cause of the