BIOACTIVITY OF APATITE–WOLLASTONITE GLASS-CERAMICS PRODUCED BY MELTING CASTING

Jongee Park () and Abdullah Ozturk
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Jongee Park: Metallurgical and Materials Engineering Department, ATILIM University, Ankara 06836, Turkey
Abdullah Ozturk: Metallurgical and Materials Engineering Department, Middle East Technical University, Ankara 06800, Turkey

Surface Review and Letters (SRL), 2013, vol. 20, issue 01, 1-7

Abstract: Glass-ceramics containing only apatite and wollastonite crystals were produced in the systemMgO-CaO-SiO2-P2O5-Fby the melt casting process. The bioactivity of the glass-ceramics was determined by immersing the glass-ceramics in a simulated body fluid (SBF) and by assessing the resulting apatite formation on the free surface after various immersion durations. A 12-μm-thick apatite layer formed on the surface of the glass-ceramic containing only apatite crystals after 20 days immersion in SBF. However, the thickness of the apatite layer formed on the surface of the glass-ceramic containing apatite and wollastonite crystals was 1 μm. Results have shown that the bioactivity of glass-ceramic depends strongly on the type of crystal(s) developed during the glass-ceramic process and their proportion in the glassy matrix.

Keywords: Apatite–wollastonite glass-ceramic; bioactivity; simulated body fluid (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1142/S0218625X13500108

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