Toddler TeethEven though your child’s first set of teeth aren’t permanent, it’s important to keep your toddler’s teeth clean. Cavities form when the naturally occurring bacteria in your toddler’s mouth combine with sugars in the food residues left on his teeth, producing an acid that attacks his tooth enamel. Teaching your little one to care for his teeth offers another great chance for you to bond, while helping make trips to the dentist easier and instilling lifelong healthy dental habits early on.