In order to prevent tooth decay in toddlers, you should not let your child go to bed with a bottle or a sippy cup of milk or juice. If you have to give your child a drink before bed, always choose water. It is recommended that children drink milk or sugary drinks quickly instead of sipping them slowly. By do that it helps to reduces the amount of time during which teeth are exposed to decay-causing sugars from the drinks in a bottle or sippy cup.
Just like adult teeth you need to make sure you are brushing and flossing your child’s teeth daily, and be sure to avoid sugary foods. The ADA suggests that your child should see the dentist for the first time on or before his/her first birthday