Document Detail


The proteoglycan contents of the temporomandibular joint disc influence its dynamic viscoelastic properties.
MedLine Citation:
PMID:  12746886     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The collagen fibers and proteoglycans in the disc of temporomandibular joint provide resistance to various loadings. Thus far, however, the role of the proteoglycans in determining the viscoelastic properties of the disc has not been investigated. In the present study the hypothesis was tested that the viscoelastic behavior of the disc decreases by the removal of proteoglycans. In 32 bovine discs, dynamic tensile tests with a wide range of frequencies were performed. Before testing, specimens were treated with different concentrations of alpha-amylase to remove proteoglycans. As the frequency increased from 0.1 to 100 Hz, the disc became more viscoelastic. Increasing the concentration of alpha-amylase significantly decreased its viscoelasticity. It was concluded that proteoglycans play an important role in determining the viscoelastic properties of the disc and, therefore, give the disc a greater capacity for distributing and reducing stresses.
Authors:
Eiji Tanaka; Junko Aoyama; Masao Tanaka; Theo Van Eijden; Masaru Sugiyama; Koichi Hanaoka; Mineo Watanabe; Kazuo Tanne
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of biomedical materials research. Part A     Volume:  65     ISSN:  1549-3296     ISO Abbreviation:  -     Publication Date:  2003 Jun 
Date Detail:
Created Date:  2003-05-14     Completed Date:  2003-10-03     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  101234237     Medline TA:  J Biomed Mater Res A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  386-92     Citation Subset:  IM    
Copyright Information:
Copyright 2003 Wiley Periodicals, Inc.
Affiliation:
Department of Orthodontics, Hiroshima University Faculty of Dentistry, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. etanka@hiroshima-u.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Animals
Cattle
Elasticity
Proteoglycans / chemistry*,  isolation & purification
Temporomandibular Joint Disk / chemistry*
Viscosity
alpha-Amylases
Chemical
Reg. No./Substance:
0/Proteoglycans; EC 3.2.1.1/alpha-Amylases

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