Document Detail


Biorheology and fluid flux in swelling tissues, II. Analysis of unconfined compressive response of transversely isotropic cartilage disc.
MedLine Citation:
PMID:  3651591     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The response of a cartilage disc to unconfined compressive loading under small deformations is analyzed. The cartilage is considered as a transversely isotropic bicomponent (solid-fluid) tissue. Concentration effects (commonly termed osmotic pressure) are accounted for. The tissue's permeability is taken to be isotropic. Its concentration force is assumed to vary linearly with volume. The analysis shows that if the tissue's fibrous structure is taken into consideration, then the instantaneous response to a step loading depends on the tissue's elasticity and on its concentration force. The subsequent creep response, under commonly used experimental conditions, has a time constant which depends on the concentration force and permeability, but independent of its elastic response. The equilibrium volume is predicted to depend only on the concentration force. Where data is available it confirms the model's predictions. It is concluded from the present analysis that inclusion of concentration effects and the tissue's fibrous structure has significant consequences in terms of the relative roles of the collagen fibers (solid) vs. the ground substance (fluid) in the response of the cartilage to compressive loading.
Authors:
Y Lanir
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biorheology     Volume:  24     ISSN:  0006-355X     ISO Abbreviation:  Biorheology     Publication Date:  1987  
Date Detail:
Created Date:  1987-11-18     Completed Date:  1987-11-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372526     Medline TA:  Biorheology     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  189-205     Citation Subset:  IM; S    
Affiliation:
Department of Biomedical Engineering, Technion-Israel Institute of Technology, Haifa.
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MeSH Terms
Descriptor/Qualifier:
Biomedical Engineering*
Cartilage / physiology*
Hydrostatic Pressure
Mathematics
Osmotic Pressure
Permeability
Rheology*
Stress, Mechanical

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


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