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Fluoride uptake by glass ionomer cements: a surface analysis approach
F H Jones1, B M Hutton, P C Hadley
1Department of Biomaterials, The Eastman Dental Institute for Oral Health Care Sciences, University College London, 256, Gray's Inn Road, London WC1X 8LD, UK. f.jones@eastman.ucl.ac.uk
Abstract:
Despite extensive research, the mechanism by which glass ionomer cements take up fluoride ions from solution remains unclear. To date, the majority of studies have concentrated on measuring the removal of ions from solution. In this study, we demonstrate the application of X-ray photoemission spectroscopy and secondary ion mass spectrometry to the surface analysis of the cements, after the introduction of fluoride either by doping or by immersion. Fluoride ion uptake from potassium fluoride solution is correlated with the formation of a surface layer which is rich in calcium as well as fluoride.
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