Healthy dental students received oral doses of 10.0 mg F daily in the form of compounds of widely varying solubilities. Parotid saliva F concentration and urinary F excretion were highest with NaF, Na2PO3F, and SnF2, lowest with CaF2, and intermediate with AlF3. Solubility of the ingested fluoride compound was a controlling factor in the amount of F excreted in the urine, the peak F concentration reached in parotid saliva, and the duration of a significant elevation in salivary F.
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