Ceramics-Silikáty 55 (2) 106-113 (2011)

STATIC AND DYNAMIC IN VITRO TEST OF BIOACTIVITY OF GLASS CERAMICS

G. Lutišanová, E. Kuzielová, M. T. Palou, J. Kozánková

The bioactivity of glass ceramics from Li₂O–SiO₂–CaO–P₂O₅–CaF₂ system, with different amount of fluorapatite expressed as P₂O₅ content, has been tested in vitro under static and dynamic regime. The paper reports the results of bioactivity test of glass ceramics in static and dynamic regime. XRD, SEM and EPMA analysis were used to characterise the sample as well as to detect the presence of new phase onto the surface of glass ceramics. The bioactivity, as demonstrated by the formation of new apatite layer, depends on P₂O₅ content and testing regime. In static regime, one can observe a fine microstructure of hydroxyapatite layer on the surface on glass ceramics samples. In dynamic regime, the formation rate of this layer seems to be retarded in comparison with that of static regime.

Keywords: Glass ceramics; In vitro test; Bioactivity; Static and dynamic regime, Hydroxyapatite