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Fluoride-containing bioactive glasses and Bioglass® 45S5 form apatite in low pH cell culture medium

Journal article
Authors Furqan A. Shah
Delia S Brauer
Nikita Desai
Robert G Hill
Karin A Hing
Published in Materials letters
Volume 119
Pages 96–99
ISSN 0167-577X
Publication year 2014
Published at
Pages 96–99
Language en
Keywords Bioactive glass; Bioactivity; Cell culture medium; pH; Biomaterials; FTIR
Subject categories Materials Chemistry, Medical Materials

Abstract

The dissolution re-precipitation behaviour of a series of fluoride-containing bioactive glasses was investigated under physiologically relevant conditions of low pH. All formulations including the classic fluoride-free 45S5 Bioglass®, dissolved in acetate-buffered MEM, and formed apatite despite the pH remaining acidic throughout. Fluoride incorporation into the glasses and subsequent fluoride release resulted in formation of an apatite (fluorapatite) of higher crystallinity; however, with increasing fluoride content in the glass, fluorite was formed at the expense of apatite. Results suggest that low fluoride content BG form apatite well at low pH conditions, representative of those present during the inflammation phase of normal bone healing or within the oral environment during caries or an acid-erosive challenge.

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