Abstract
Hydroxyapatite/titanium (HA/Ti) structures heat-treated and then incubated in CaCl2 (3 mM Ca2+) and KH2PO4 + Na2HPO4 (20 mM; pH 6, 7, 8) solutions have been characterized by X-ray diffraction, X-ray microanalysis, scanning electron microscopy, and pX measurements. The insoluble phases CaTiO3 and CaTi4O9 have been identified. After prolonged incubation (96 h), the heat-treated structures were found to be biologically resistant. Thermostating the structures in the physiological buffer solutions studied does not rupture the bioactive film, and the HA/Ti structure is stable in such solutions.
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