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TECHNICAL PAPERS

Implementation of Strain Rate as a Bone Remodeling Stimulus

[+] Author and Article Information
Gangming Luo, Stephen C. Cowin, Ali M. Sadegh, Yves P. Arramon

Department of Mechanical Engineering, The School of Engineering of The City College and The Graduate School of The City University of New York, New York, NY 10031

J Biomech Eng 117(3), 329-338 (Aug 01, 1995) (10 pages) doi:10.1115/1.2794188 History: Received October 14, 1993; Revised July 26, 1994; Online October 30, 2007

Abstract

Strain rate is implemented as a stimulus for surface bone remodeling. Using idealized models of trabecular bone structures, the surface remodeling predictions using the strain rate as the stimulus are compared with the predictions using the peak strain magnitude as the stimulus. For a uniaxially loaded cruciform shape, the comparison shows that the two surface remodeling stimuli predict the same final shape under a periodic compressive load, but the two evolutionary paths to final shapes are different. Two biaxially loaded regular grid models of trabecular structure were considered, one a grid of square diamond shaped elements and the other a brick wall patterned grid. For both of these idealized trabecular structures, the comparison shows that the two surface remodeling stimuli predict the same final shape under a periodic compressive load, even from these distinctly different initial grid patterns, and the evolutionary paths to final shapes are quite different. In general the two stimuli do not predict the same remodeling and the conditions under which they do are derived. The models developed are also applied to the data from the animal experiments reported in Goldstein et al. (1991), and it is shown that the strain rate stimulus predicts bone remodeling similar to what was experimentally observed.

Copyright © 1995 by The American Society of Mechanical Engineers
Topics: Bone , Shapes , Stress , Bricks , Diamonds
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