We’re talking about teeth with a friendly dentist! How do teeth become loose? Why do our baby teeth fall out? Why do people only have two sets of teeth? Why don’t babies have teeth when they’re born? Why are teeth white? Why do we have gums in our mouth? How does toothpaste clean your teeth? How does sugar make cavities? We get answers from Theron Main, a pediatric dentist at Timberlane Dental Group in South Burlington, Vermont.