Journal of Dental Research, Vol 63, 1056-1060, Copyright © 1984 by International & American Associations for Dental Research Online Journals
Fluoride uptake by partially-decalcified enamel: a study of possible involvement of acid phosphate ions
A. J. Moore
Ionic fluoride and HPO(2-)4 concentrations were determined in
partially-decalcified enamels before and after exposure to NaF or MFP
toothpastes, to determine whether fluoride uptake could be attributed to
reactions with HPO(2-)4. Acid phosphate concentrations did not alter upon
exposure to fluoride, even though large uptake of fluoride did occur.
Infra-red spectroscopy showed HPO(2-)4 in artificially decalcified enamel
to be adsorbed rather than present as a discrete secondary orthophosphate.