Ceramics-Silikáty 42 (3) 114-118 (1998) 

STUDY OF BIOACTIVE GLASSES BY "IN VITRO" TESTS, PART 1 - ASSESSMENT OF GLASSES ON THE BASIS OF ANALYSES OF EXTRACTS INTO MODEL SOLUTIONS 

L. Jonášová, L. Rybaříková 

Changes in (PO₄)^3- content in extracts from glass into simulated body fluid following various times of extraction were studied on glasses of the system Na₂O-CaO-SiO₂ both with and without a phosphorus content. Following the exposure, the glass surfaces of the samples were evaluated by X-ray diffraction analysis and by IR spectroscopy. The results showed that the changes in phosphorus concentration in the simulated solution allowed glasses of various composition to be assessed with respect to formation of hydroxyapatite layers on the surface.

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