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Reinforcement of hydroxyapatite by adding P2O5-CaO glasses with Na2O, K2O and MgO

✍ Scribed by J. D. Santos; P. L. Silva; J. C. Knowles; S. Talal; F. J. Monteiro

Publisher: Springer
Year: 1996
Tongue: English
Weight: 300 KB
Volume: 7
Category: Article
ISSN: 0957-4530
DOI: 10.1007/bf00121259

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✦ Synopsis

Commercial hydroxyapatite was reinforced by adding small amounts (2 and 4wt%) of P2Os-based glasses during its sintering process. The composites prepared had a chemical composition closely related to the mineral part of bone tissues in terms of trace elements usually detected, such as Na, K and Mg. X-ray diffraction analysis (XRD) showed that the glass reinforced-HA composites were composed of a HA matrix and variable amounts of tricalcium phosphate phase, depending on sintering temperature and glass composition. These composites were shown to have much higher biaxial bending strength than sintered HA, 107 MPa for Ha/2% of 35P=O5-35CaO-10Na20-10K20-10MgO glass composite and 28 MPa for sintered HA. The presence of J3-tricalcium phosphate in the microstructure of the composites is an important factor in the reinforcement process.

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