Document Detail


Contact pressure prediction in total knee joint replacements. Part 1: General elasticity solution for elliptical layered contacts.
MedLine Citation:
PMID:  7669116     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A general elasticity contact theory has been developed to predict the contact area and the contact pressure in total knee joint replacements with elliptical contacts where the thickness of ultra high molecular weight polyethylene (UHMWPE) is similar or less than the contact half width. The interfacial boundary condition between the UHMWPE component and the underlying metal substrate has been considered to be either perfectly bonded or perfectly unbonded in the model. Poisson's ratio for UHMWPE has been assumed to be 0.3 or 0.4. The effect of the thickness of the UHMWPE layer on the contact area and the contact pressure has been examined. The predictions of the maximum contact pressure and the contact area have been presented in non-dimensional forms and can readily be applied for typical design configurations of current total knee joint replacements. Furthermore, the present results can readily be applied to design considerations for total knee joint replacements to reduce contact stresses within the UHMWPE component.
Authors:
Z M Jin; D Dowson; J Fisher
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine     Volume:  209     ISSN:  0954-4119     ISO Abbreviation:  Proc Inst Mech Eng H     Publication Date:  1995  
Date Detail:
Created Date:  1995-10-19     Completed Date:  1995-10-19     Revised Date:  2009-06-08    
Medline Journal Info:
Nlm Unique ID:  8908934     Medline TA:  Proc Inst Mech Eng H     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1-8     Citation Subset:  IM    
Affiliation:
Department of Mechanical Engineering, University of Leeds.
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MeSH Terms
Descriptor/Qualifier:
Elasticity
Humans
Knee Prosthesis*
Models, Theoretical
Poisson Distribution
Polyethylenes
Pressure
Prosthesis Design
Stress, Mechanical
Chemical
Reg. No./Substance:
0/Polyethylenes

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


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