The body needs important nutrients to stay healthy, and so do teeth. To have teeth strong enough to stand up against decay, you need fluoride, a mineral that helps strengthen tooth enamel. Some young patients may not be getting enough fluoride, though. Rinsing with fluoride at home between visits, can help your child build stronger teeth. What’s more, by drinking tap water, which contains fluoride, instead of bottled water, children can gain an even bigger advantage over tooth decay.