Fluoride Therapy
Fluoride therapy is the delivery of fluoride to the teeth, topically or systemically, to protect them from dental caries (cavities). Strictly speaking, fluoride therapy repairs rather than prevents damage to the teeth, causing the mineral fluorapatite
to be incorporated into damaged tooth enamel. Fluorapatite is not a
natural component of human teeth, although it is found in the teeth of sharks. The main mineral found in natural tooth enamel is hydroxyapatite
rather than the fluorapatite created in the presence of fluoride. Even
without fluoride, teeth experience alternating increases and decreases
in mineral content, depending upon how acidic or basic the mouth is, and
depending upon the concentration of other substances in the mouth, such
as phosphate and calcium. Fluoride enhances and modifies the
restoration of the mineral content of the teeth, and counteracts the
breakdown of the teeth from lactic acid producing bacteria. The purpose
of tooth-brushing is twofold: to mechanically remove plaque, and also to apply fluoride to the tooth surface, promoting re-mineralisation with fluorapatite.