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The wear of metal-on-metal total hip prostheses measured in a hip simulator.

Scholes, S. C. and Green, S. M. and Unsworth, A. (2001) The wear of metal-on-metal total hip prostheses measured in a hip simulator. Proceedings Of The Institution Of Mechanical Engineers. Part H, Journal Of Engineering In Medicine, 215 (6). pp. 523-530. ISSN 0954-4119

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Abstract

New generation metal-on-metal prostheses have been introduced to try and overcome the problem of osteolysis often attributed to the wear particles of the polyethylene component of conventional metal-on-ultra-high molecular weight polyethylene (UHMWPE) joints. The wear rates of four metal-on-metal joints (two different clearances) were assessed along with that of a conventional metal-on-UHMWPE joint. Friction measurements of the metal-on-metal joints were taken before and after the wear test and compared. Two distinct wear phases were discernible for all the metal-on-metal joints: an initial wear phase up to 0.5 × 106 cycles and then a lower steady state wear phase. The steady state wear rate of the 22 μUm radial clearance metal-on-metal joint was lower than that for the 40 μUm radial clearance joint, although this difference was not found to be significant (p > 0.15). The wear rates for all the joints tested were consistent with other simulator studies. The friction factors produced by each joint were found to decrease significantly after wear testing (p < 0.05).

Item Type: Article
Journal or Publication Title: Proceedings Of The Institution Of Mechanical Engineers. Part H, Journal Of Engineering In Medicine
Uncontrolled Keywords: wear ; friction ; cobalt-chrome-molybdenum ; hip simulator ; metal-on-metal
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 57841
Deposited By: ep_importer_pure
Deposited On: 16 Oct 2012 13:50
Refereed?: Yes
Published?: Published
Last Modified: 24 Jan 2014 05:31
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57841

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