Fluoride's Importance to the Teeth

Enamel, the outer layer of the crown of a tooth, is made of closely packed mineral crystals. Every day, minerals are lost and gained from inside the enamel crystals. These processes are called demineralization and remineralization.

Demineralization is when acids in the mouth dissolve the enamel crystals that make up the outer layer of the tooth. These acids are formed by the combination of plaque bacteria and sugar in your mouth. The loss of enamel is balanced by remineralization. In this process, minerals such as fluoride, calcium and phosphate are deposited inside the enamel. Too much loss of minerals without enough replacement leads to tooth decay.

Fluoride helps teeth in two ways. When children eat or drink fluoride in small doses, it enters the bloodstream and becomes part of their developing permanent teeth. This also makes it harder for acids to cause demineralization. In addition, fluoride works directly on teeth in the mouths of children and adults. It helps to speed remineralization and disrupt the production of acids by bacteria.