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

Oscar Peitl FilhoSão Carlos Federal University, São Paulo, BrazilGuy P. La TorreAdvanced Materials Research Center, University of Florida, Gainesville, FloridaLarry L. HenchAdvanced Materials Research Center, University of Florida, Gainesville, Florida

1996en

ABI

Annotatsiya

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%.

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Identifikatorlar

DOI: 10.1002/(sici)1097-4636(199604)30:4<509::aid-jbm9>3.0.co;2-t

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