Abstract
The presence of artificial pellicle and plaque alters the mechanism of uptake of 18F by enamel from an acidulated phosphate fluoride solution (APF) labelled with 18F but has no apparent effect on the mechanism of uptake of the isotope from a labelled solution of NaF with a similar fluoride content (1.2 per cent). The presence of artificial plaque has no significant effect on the quantitative uptake of 18F by enamel from labelled solutions of either APF or NaF in 4 min. Results from a similar experiment using plaque formed in vivo support these findings.
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