Sentence Examples


  • When enough fluoride from water, supplements, food, or other sources enters the bloodstream and reaches the teeth while the enamel is forming, the fluoride can replace a piece of the hydroxyapatite molecule to form fluorapatite.
  • The enamel that covers the crown, the part of the tooth that is above the gum, is made of a substance called hydroxyapatite.
  • Fluorapatite-Fluoride-substituted hydroxyapatite.