A mineral formed during the remineralization of enamel when fluoride ions are present. The formation takes place according to the following equation:Ca10(PO4)6(OH)2+2F−=Ca10(PO4)6(F)2+2OH−
calcium hydroxyapatite + fluoride ions = calcium fluorapatite + hydroxyl ions.
Calcium fluorapatite is more resistant to acid caries attack than calcium hydroxyapatite. See also caries; fluoride.