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Mechanical characterization of brushite and hydroxyapatite cements

Paper ID Volume ID Publish Year Pages File Format Full-Text
13525 868 2001 9 PDF Available
Title
Mechanical characterization of brushite and hydroxyapatite cements
Abstract

Compression, tension and torsion tests were designed and completed successfully on a brushite and a precipitated hydroxyapatite cement in moist condition. Elastic and strength properties were measured for these three loading cases. For each cement, the full set of strength data was fitted to an isotropic Tsai–Wu criterion and the associated coefficients identified. Since the compressive Young's moduli were about 10% larger than the tensile moduli, the full set of elastic data of each cement was fitted to a conewise linear elastic model. Hysteresis of the stress-strain curves was also observed, indicating dissipation mechanisms within these cement microstructures. A comparison of the measured mechanical properties with human cancellous bone confirmed the indication of brushite as a bone filling material and the potential of the hydroxyapatite cement as a structural biomaterial.

Keywords
Brushite; Calcium phosphate cement; Elasticity; Hydroxyapatite; Mechanical properties; Strength criterion
First Page Preview
Mechanical characterization of brushite and hydroxyapatite cements
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 22, Issue 21, November 2001, Pages 2937–2945
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering