Document Detail

A finite element exploration of cartilage stress near an articular incongruity during unstable motion.
MedLine Citation:
PMID:  17604036     Owner:  NLM     Status:  MEDLINE    
Both instability and residual articular incongruity are implicated in the development of post-traumatic osteoarthritis (OA) following intra-articular fracture, but currently no information exists regarding cartilage stresses for unstable residual incongruities. In this study, a transversely isotropic poroelastic cartilage finite element model was implemented and validated within physiologically relevant loading ranges. This material model was then used to simulate the loading of cartilage during stable and unstable motion accompanying a step-off incongruity residual from intra-articular fracture, using load data from previous cadaver tests of ankle instability. Peak solid-phase stresses and fluid pressure were found to increase markedly in the presence of instability. Solid-phase transients of normal stress increased from 2.00 to 13.8 MPa/s for stable compared to unstable motion, and tangential stress transients increased from 17.1 to 118.1 MPa/s. Corresponding fluid pressure transients increased from 15.1 to 117.9 MPa/s for unstable motion. In the most rapidly loaded sections of cartilage, the fluid was found to carry nearly all of the normal load, with the pressurization of the fluid resulting in high solid matrix tangential stresses.
Curtis M Goreham-Voss; Todd O McKinley; Thomas D Brown
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.     Date:  2007-06-29
Journal Detail:
Title:  Journal of biomechanics     Volume:  40     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  2007  
Date Detail:
Created Date:  2007-10-30     Completed Date:  2008-01-09     Revised Date:  2014-09-08    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3438-47     Citation Subset:  IM    
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MeSH Terms
Cartilage, Articular / physiology*
Finite Element Analysis
Stress, Mechanical
Grant Support
AR48939/AR/NIAMS NIH HHS; P50 AR048939/AR/NIAMS NIH HHS; P50 AR048939-019002/AR/NIAMS NIH HHS; R49 CCR721745//PHS HHS

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

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