Document Detail

The elastic moduli of human subchondral, trabecular, and cortical bone tissue and the size-dependency of cortical bone modulus.
MedLine Citation:
PMID:  2277045     Owner:  NLM     Status:  MEDLINE    
The elastic moduli of human subchondral, trabecular, and cortical bone tissue from a proximal tibia were experimentally determined using three-point bending tests on a microstructural level. The mean modulus of subchondral specimens was 1.15 GPa, and those of trabecular and cortical specimens was 4.59 GPa and 5.44 GPa respectively. Significant differences were found in the modulus values between bone tissues, which may have mainly resulted from the differences in the microstructures of each bone tissue rather than in the mineral density. Furthermore, the size-dependency of the modulus was examined using eight different sizes of cortical specimens (heights h = 100-1000 microns). While the modulus values for relatively large specimens (h greater than 500 microns) remained fairly constant (approximately 15 GPa), the values decreased as the specimens became smaller. A significant correlation was found between the modulus and specimen size. The surface area to volume ratio proved to be a key variable to explain the size-dependency.
K Choi; J L Kuhn; M J Ciarelli; S A Goldstein
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.; Review    
Journal Detail:
Title:  Journal of biomechanics     Volume:  23     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  1990  
Date Detail:
Created Date:  1991-03-01     Completed Date:  1991-03-01     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1103-13     Citation Subset:  IM; S    
Biomechanics, Trauma, and Sports Medicine Laboratory, University of Michigan, Ann Arbor.
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MeSH Terms
Bone Density / physiology
Bone and Bones / anatomy & histology,  physiology*,  ultrastructure
Microscopy, Electron, Scanning
Middle Aged
Models, Biological
Stress, Mechanical
Grant Support

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

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