alexa Effect of crystallization on apatite-layer formation of bioactive glass 45S5.


Bioceramics Development and Applications

Author(s): Peitl Filho O, LaTorre GP, Hench LL

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Abstract The bioactive glass 45S5 was crystallized to 8-100 vol \% of crystals by thermal treatments from 550-680 degrees C. The micro-structure of the glass-ceramics had a very uniform crystal size, ranging from 8 to 20 microns. Fourier-transform infrared (FTIR) spectroscopy was used to determine the rate of hydroxycarbonate apatite (HCA) formation that occurs on bioactive glass and glass-ceramic implants when exposed to simulated body fluid (SBF) solutions. Crystallization did not inhibit development of a crystalline HCA layer, but the onset time of crystallization increased from 10 h for the parent glass to 22 h for 100\% crystallized glass-ceramic. The rate of surface reactions was slower when the percentage of crystallization was > or = 60\%. This article was published in J Biomed Mater Res and referenced in Bioceramics Development and Applications

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