filling: restoration of lost tooth structure with metal, porcelain, or resin materials.
fistula: channel emanating pus from an infection site; a gum boil.
flap surgery: lifting of gum tissue to expose and clean underlying tooth and bone structures.
flossing: a thread-like material used to clean between the contact areas of teeth; part of a good daily oral hygiene plan.
fluoride: a mineral that helps strengthen teeth enamel making teeth less susceptible to decay. Fluoride is ingested through food or water, is available in most toothpastes, or can be applied as a gel or liquid to the surface of teeth by a dentist.
fluorosis: discoloration of the enamel due to too much fluoride ingestion (greater than one part per million) into the bloodstream, also called enamel mottling.
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