Abstract
Fluoride concentration and volume of expectorates collected after chewing or rinsing with three different supplemental fluoride preparations were determined. Fluoride contained in the administered dose was measured and amount of fluoride in the collected volume was subtracted from it to yield the amount of fluoride retained. Retentions of 41, 20, and 7% of the dose were found with a NaF tablet, an APF tablet, and an APF rinse, respectively.