What causes baby bottle tooth decay?

Decay occurs when sweetened liquids are given and are left clinging to an infant's teeth for long periods of time. Many sweet liquids cause problems, including milk, formula and fruit juice. Bacteria in the mouth use these sugars as food. They then produce acids that attack the teeth. Each time your child drinks these liquids, acids attack for 20 minutes or longer. After many attacks, cavities start to form on the teeth.

It's not just what you put in your child's bottle that causes decay, but how often — and for how long a time. Giving your child a bottle of sweetened liquid many times a day isn't a good idea. Allowing your child to fall asleep with a bottle during naps or at night can also harm the child's teeth.