Fluoride treatment is used to help strengthen your teeth and prevent cavities. Although fluoride is a naturally occurring element that is present in our food and water, there are instances when our teeth need additional protection. Fluoride treatment can be painted on, used as a foam, or even a mouthwash. Following your fluoride treatment, you may need to refrain from eating or drinking for 30 minutes to allow the full effect of the treatment to work. Depending on your risk of developing cavities, your dentist may recommend more or less fluoride treatments to protect your teeth and prevent further decay.