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Movement loci of selected points on the femoral head for individual total hip arthroplasty patients using three-dimensional computer simulation

Bennett, D, Orr, JF and Baker, RJ 2000, 'Movement loci of selected points on the femoral head for individual total hip arthroplasty patients using three-dimensional computer simulation' , The Journal of Arthroplasty, 15 (7) , pp. 909-915.

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Abstract

Wear of ultra-high-molecular-weight polyethylene (UHMWPE) and the subsequent adverse tissue reaction to the wear particles has been cited as the predominant problem affecting total joint arthroplasties. Wear of the UHMWPE acetabular cup in total hip arthroplasties (THAs) is influenced by the sliding distance and direction of individual points on the femoral head, which has as yet been ascertained only for normal subjects. This study seeks to determine the trajectory of specified points on the femoral head for individual THA patients and the distances traversed by these points. A computer program was designed to use gait data from THA patients to simulate the motion of these points. Gait analysis was performed on 19 THA patients at a period of 5 years after operation. The orientation of the acetabular cup was ascertained from radiographs to determine the position of the points on the head most involved in the wear process. The loci of the points differed widely in size, shape, and direction between subjects. The largest average distance traversed was 140% greater than the smallest average distance traversed. Shorter longitudinal paths would tend to cause less wear than larger, wider paths, which cross a greater number of adjacent paths.

Item Type: Article
Themes: Health and Wellbeing
Schools: Colleges and Schools > College of Health & Social Care
Colleges and Schools > College of Health & Social Care > School of Health Sciences
Journal or Publication Title: The Journal of Arthroplasty
Publisher: Elsevier
Refereed: Yes
ISSN: 0883-5403
Depositing User: RH Shuttleworth
Date Deposited: 07 Jul 2011 10:00
Last Modified: 20 Aug 2013 16:59
URI: http://usir.salford.ac.uk/id/eprint/16585

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