Fluoride is a chemical compound that is proven to be beneficial to teeth. It strengthens enamel and prevents decay. As a result, there are many over-the-counter toothpastes and mouthwashes containing fluoride. However, those who are at an extra high risk for cavities may benefit from professional fluoride treatments in addition to daily doses. This is generally delivered in the form of a gel, foam or solution that is highly-concentrated with fluoride. It’s typically applied with a swab or brush or even placed in a tray that is held in the mouth for several minutes.