Tooth enamel is hard and porous. It consists of many closely-packed rods made of minerals. When you eat, acid forms on the outside of the tooth and seeps into the enamel's pores. This demineralization process can produce a weak spot in the tooth's surface. If unchecked, the enamel can decay and create a cavity.
Fluoride helps prevent tooth decay by slowing the breakdown of enamel and speeding up the natural remineralization process.
Common sources of fluoride are fluoridated drinking water, toothpaste and mouth rinse. Your drinking water can be tested for fluoride levels, ask you dentist about this. High concentration fluoride gels, mouth rinses, drops and tablets are available by prescription.
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