Tissue-level Remodeling Simulations of Cancellous Bone Capture Effects of in Vivo Loading in a Rabbit Model

Overview

Journal J Biomech

Specialty Physiology

Date 2015 Jan 13

PMID 25579991

Citations 5

Authors

Timothy G Morgan

Mathias P G Bostrom

Marjolein C H van der Meulen

Affiliations

Soon will be listed here.

Abstract

The adaptation of cancellous bone to mechanical stimuli occurs throughout normal skeletal growth and aging, as well as in response to surgery, disease and device implantation. Previously we developed an in vivo cancellous loading model in the distal lateral femur of the rabbit. In response to daily in vivo loading for four weeks, bone mass increased, trabeculae thickened and the apparent modulus of the underlying cancellous bone increased. Here, we simulated our prior in vivo rabbit loading experiment using a cell-based tissue remodeling algorithm (Mullender et al., 1994) and compared the results to the in vivo experimental data published previously. Cancellous bone tissue was added or removed from the surface of trabeculae in regions of high and low mechanical stimulus, respectively. To examine the effect of material properties on mechanically regulated adaptation, we implemented both a homogeneous material model and a model where the relative density of tissue was lower for new and surface bone tissue compared to interior tissue. The simulations captured the changes in histomorphometric parameters and mechanical properties measured in the in vivo experiment illustrating the ability of computational simulations to predict the effect of mechanically regulated adaptation on cancellous bone histomorphometry and apparent modulus.

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