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Local Mineral and Matrix Changes Associated with Bone Adaptation and Microdamage

Published online by Cambridge University Press:  26 February 2011

David H. Kohn ,
Nadder D. Sahar ,
Sun Ig Hong ,
Kurtulus Golcuk  and
Michael D. Morris
David H. Kohn
Affiliation:
dhkohn@umich.edu, University of Michigan, Biologic and Materials Sciences, 1011 N. University Ave., Ann Arbor, MI, 48109-1078, United States, 734-764-2206, 734-647-2110
Nadder D. Sahar
Affiliation:
nsahar@umich.edu, University of Michigan, Biomedical Engineering, United States
Sun Ig Hong
Affiliation:
sihong@cnu.ac.kr, Chungnam National University, Metallurgical Engineering, Korea, Republic of
Kurtulus Golcuk
Affiliation:
kgolcuk@umich.edu, University of Michigan, Chemistry, United States
Michael D. Morris
Affiliation:
mdmorris@umich.edu, University of Michigan, Chemistry, United States
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Abstract

Skeletal fractures represent a significant medical and economic burden for society. It is generally thought that a high incidence of musculoskeletal fatigue loading results in damage accumulation at too high of a rate to be efficiently remodeled, leading to skeletal fracture. The state of damage in bone at a given time is therefore the net result of damage and repair processes, and is dependent upon extrinsic factors such as mechanical history, but also upon intrinsic factors, such as composition of bone mineral and matrix. In this invited paper, we review investigations on the coupling of Raman spectroscopy with mechanical loading of bone, providing insight into mechanisms of ultrastructural deformation in bone at smaller scales than previously understood. We also present new data showing that in-vivo mechanical loading results in increased resistance to fatigue damage, coupled with an increase in phosphate to amide I ratio and decrease in carbonate to phosphate ratio. Taken together, the data demonstrates the ability to modulate the mechanical and chemical properties of bone via exogenous mechanical stimulation.

Keywords

bonemicrostructurefatigue
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 898: Symposium L – Mechanical Behavior of Biological and Biomimetic Materials , 2005 , 0898-L09-03
Copyright
Copyright © Materials Research Society 2006

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