Tooth decay in infants and very young children is often referred to as baby bottle tooth decay. This tooth decay happens when sweetened liquids or those with natural sugars (like milk, formula, and fruit juice) cling to an infant's teeth for a long time. Bacteria in the mouth thrive on this sugar and make acids that attack the teeth. One way to prevent this? Never allow your child to fall asleep with a bottle containing anything but water. -via WebMD
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