What is the primary mechanism by which fluoride protects against dental caries?

Fluoride incorporates into enamel forming fluorapatite, which is more acid-resistant; it favors remineralization and reduces demineralization (dissolution of calcium phosphate), and at higher concentrations inhibits bacterial enzymes.Other options: Fluoride does not principally act by raising salivary flow or by sealing fissures (that is a sealant). It inhibits but does not indiscriminately kill all bacteria.Key exam takeaway: Fluoride's main anticaries action: enhance remineralization and inhibit demineralization by forming acid-resistant fluorapatite.