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Solution effects on the surface reactions of a bioactive glass

✍ Scribed by Filgueiras, M. Regina ;La Torre, Guy ;Hench, Larry L.

Publisher: John Wiley and Sons
Year: 1993
Tongue: English
Weight: 529 KB
Volume: 27
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.820270405

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✦ Synopsis

The in vitro surface reactions of a 45S5 bioactive glass in three simulated body fluids (SBF) are analyzed using Fourier transform infrared (FTIR) spectroscopy. Five reaction stages are observed. Calcium and phosphate ions in SBF accelerate to a small extent the repolymerization of silica (Stage 3) and formation of an amorphous calcium-phosphate (a-CP) layer (Stage 4) on the glass surface. The a-CaP layer is crystallized to form hydroxycarbonate apatite (HCAp) (Stage 5) more rapidly in the Ca-and P-containing SBF solutions (in 90 min rather than 120 min). However, Mg ions in SBF slow down formation of the a-CaP layer and greatly retard crystallization of HCAp on the glass surface.

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