A topical fluoride treatment is applied directly to the tooth enamel, which protects and enhances the oral health of the patient. The fluoride preparation used in the dental office is a much stronger concentration than that in toothpastes or fluoride mouth rinses that may be available in a store or at a pharmacy. Professional fluoride treatments generally take just a few minutes. The fluoride may be in the form of a solution, gel, foam or varnish. Typically, it is applied with a cotton swab or brush, or it is used as a rinse or placed in a tray that is held in the mouth for several minutes. After the treatment, you may be asked not to rinse, eat or drink for at least 30 minutes to allow the teeth to absorb the fluoride and help repair microscopic carious areas. Depending on your oral health status, fluoride treatments may be recommended every three, six or 12 months.