According to the American Academy of Pediatric Dentistry, at 12 months, your baby is old enough to visit the dentist. Cavities are a common concern with children, so it is essential to take your child to the dentist regularly. According to the Centers for Disease Control and Prevention, more than one in four children have tooth decay by the time they enter kindergarten. Yet cavities are preventable with proper infant oral care that continues throughout childhood and the teen years.