| Literature DB >> 8847359 |
O Peitl Filho1, G P LaTorre, L L Hench.
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%.Entities:
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Year: 1996 PMID： 8847359 DOI： 10.1002/(SICI)1097-4636(199604)30:4<509::AID-JBM9>3.0.CO;2-T
Source DB: PubMed Journal: J Biomed Mater Res ISSN： 0021-9304