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The Contribution of Crystallinity to Tissue-level Properties in Modern and Fossilized Bone

Published online by Cambridge University Press:  15 March 2011

Sara E. Olesiak ,
Matthew Sponheimer ,
Jaelyn J. Eberle  and
Virginia L. Ferguson
Sara E. Olesiak
Affiliation:
Department of Mechanical Engineering, University of Colorado, Boulder, CO, 80309, USA
Matthew Sponheimer
Affiliation:
Department of Anthropology, University of Colorado, Boulder, CO, 80309, USA
Jaelyn J. Eberle
Affiliation:
CU Museum and Department of Geological Sciences, University of Colorado, Boulder, CO, 80309, USA
Virginia L. Ferguson
Affiliation:
Department of Mechanical Engineering, University of Colorado, Boulder, CO, 80309, USA
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Abstract

A range of mineral content values and organization of the collagen and mineral phases are possible contributors to the significant variance demonstrated within the nanomechanical behavior of mineralized tissues. A combined approach using nanoindentation, to assess nanomechanical behavior, and X-ray diffraction, for analysis of crystallinity and composition, were used to investigate a range of modern and fossilized bone samples. This work provides new insight into the functional role of organization and composition of the mineral phase within heterogeneous, mineralized materials of biological origin. While the predominant influence on nanomechanical behavior is made by mineral volume fraction, the crystallinity was shown to play a significant role in the nanomechanical behavior of modern and fossilized bone samples. The interplay between material structure and function will ultimately help to elucidate the relative contributions of various factors to nanomechanical behavior and lead to improved development of biomimetic materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1132: Symposium Z – Mechanics of Biological and Biomedical Materials , 2008 , 1132-Z01-06
Copyright
Copyright © Materials Research Society 2009

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