Cavities, or dental caries, are areas of tooth decay. Over long periods of time, frequent contact of teeth to liquids containing sugars can cause tooth decay. Natural sugars are found in breast milk, formula, juices and carbonated and non-carbonated drinks.
Plain water is the only liquid without a natural sugar.
Bacteria in the mouth quickly change these sugars to acid. The acids attack the tooth enamel and cause decay. Mouth care should begin at birth, before any teeth appear. Wipe your baby's gums with a soft wet washcloth or gauze pad. Gently massage the gums at least once a day.