Document Detail


Changes in the contact area during the bedding-in wear of different sizes of metal on metal hip prostheses.
MedLine Citation:
PMID:  15156105     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In metal on metal hip prostheses, the contact mechanics can influence the lubrication and wear rate. In particular, during the bedding-in wear, the contact area gradually increases to an optimal value, and the wear rate reduces as the contact stress reduces and the lubrication conditions improve. Geometrical designs that reduce the volume of bedding-in wear as the optimal contact area develops are preferable. The objective of this study was to analyse the wear volume as a function of contact area during the bedding-in period, with the aim of identifying geometrical design configurations that give lower bedding-in wear. As the radial clearance was reduced, the bedding-in wear volume to reach an optimal contact area also reduced. For a fixed radial clearance, increasing the head diameter also reduced the bedding-in wear volume.
Authors:
X Q Hu; G H Isaac; J Fisher
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Bio-medical materials and engineering     Volume:  14     ISSN:  0959-2989     ISO Abbreviation:  Biomed Mater Eng     Publication Date:  2004  
Date Detail:
Created Date:  2004-05-24     Completed Date:  2004-09-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9104021     Medline TA:  Biomed Mater Eng     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  145-9     Citation Subset:  IM    
Copyright Information:
Copryright 2004 IOS Press
Affiliation:
Institute of Medical and Biological Engineering, School of Mechanical Engineering, The University of Leeds, Leeds LS2 9JT, UK.
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MeSH Terms
Descriptor/Qualifier:
Computer Simulation
Computer-Aided Design
Equipment Failure Analysis / methods*
Friction
Hip Joint / physiopathology*,  surgery*
Hip Prosthesis*
Humans
Metals / chemistry*
Models, Biological*
Pressure
Prosthesis Design / methods
Prosthesis Failure*
Stress, Mechanical
Surface Properties
Chemical
Reg. No./Substance:
0/Metals

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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