Several specific types of bacteria that live on the teeth cause decay. When sugar is consumed, the bacteria use the sugar and then manufacture acids that dissolve the teeth and cause an infection in the tooth. This infection is called decay.
Babies who go to bed with a bottle of milk, formula, or juice are more likely to get tooth decay. Because the sugar in formula, milk, or juice stays in contact with the teeth for a long time during the night, the teeth can decay quickly.
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