Teeth and bones of the main components of hydroxyapatite, with the fluoride ion carboxymethyl apatite greater affinity, and hydroxyapatite can be replaced by the carboxyl. The nitrogen-containing apatite more solid, but not easily dissolved in acid.
Usually oral bacteria can be left in the mouth of the sugar into alcohol-fat acid, which slowly dissolved hydroxyapatite, leading to loss of teeth enamel, causing cavities or tooth decay, or caries disease.
Fluoride on the enamel of the acid corrosion resistance have the capacity not only to avoid suffering from dental caries disease, and will not be dissolved slowly arising from age-related osteoporosis, so medicine is often, the use of sub-nitride tin repair tooth decay.
Normal adult teeth of the amount of fluoride per 100 grams of 11 milligrams of fluoride in the teeth, bones in the amount of fluoride also increased with age.
In addition, human blood and tissues also contain a trace amount of fluoride. Can promote wound healing, intestinal absorption of iron to help nerve conduction and some of the excitement of the metabolic enzyme.
Fluoride from drinking water and human food. Is the main drinking water.
Fluorine-containing foods have more seafood, tea, fluoride also focused on the food of the skin, so eat the skin of food and lack of rough rice could have been avoided lack of fluoride。