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Interaction of fluoride complexes derived from glass-ionomer cements with hydroxyapatite

Interaction of fluoride complexes derived from glass-ionomer cements with hydroxyapatite

Lewis, Selma M., Coleman, Nichola J., Booth, Samantha E. and Nicholson, John W. (2013) Interaction of fluoride complexes derived from glass-ionomer cements with hydroxyapatite. Ceramics-Silikáty, 57 (3). pp. 196-200. ISSN 0862-5468 (Print), 1804-5847 (Online)

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A study has been undertaken of the interaction of complexed fluoride extracted from glass-ionomer dental cements with synthetic hydroxyapatite powder. Extracts were prepared from two commercial glass-ionomers (Fuji IX and ChemFlex) under both neutral and acidic conditions. They were analysed by ICP-OES and by fluoride-ion selective electrode with and without added TISAB to decomplex the fluoride. The pH of the acid extracts was 4, conditions under which fluoride complexes with protons as HF or HF2-, it also complexes with aluminium, which was found to be present in higher amounts in the acid extracts. Fluoride was found to be almost completely complexed in acid extracts, but not in neutral extracts, which contained free fluoride ions. Exposure of these extracts to synthetic hydroxyapatite powder showed that fluoride was taken up rapidly (within 5 minutes), whether or not it was complexed SEM (EDAX) study of recovered hydroxyapatite showed only minute traces of aluminium taken up under all conditions. This showed that aluminium interacts hardly at all with hydroxyapatite, and hence is probably not involved in the remineralisation process.

Item Type: Article
Additional Information: [1] Submitted: 16 January 2013. [2] Accepted: 15 May 2013.
Uncontrolled Keywords: fluoride, hydroxyapatite, dental cements, glass-ionomers, aluminium
Subjects: Q Science > QD Chemistry
R Medicine > RK Dentistry
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science > School of Science (SCI)
Related URLs:
Last Modified: 17 Oct 2016 09:12

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