[The salivary fluoride level after administration of fluorides and fluoride complex salts].

Compounds of fluorine and Si or Fe are found in nature and are sometimes formed from F ions in the stomach. The chemistry of the release of resorbable F ions from such compounds in the intestinal tract is described. To demonstrate fluorine availability at the enamel surface daily profiles of fluorine concentration in the saliva of seven subjects after a single administration of a NaF and Na3FeF6 tablet are presented and their effect on the remineralization of the dental enamel described.