Dentists can now treat your child's teeth a lot earlier, now more than ever. Dentists can even apply a fluoride varnish over a child's teeth that's safe for them. There was a recent study that observed 1 year olds who have gotten this treatment twice a year. They were found to be four times less likely to develop cavities in their baby teeth. Dentists can also use sealants and coatings to prevent any tooth decay.