Special | 28m 49s | Video has closed captioning.
Smile. A set of good teeth is a sign of good health. But how do you keep your teeth healthy? Why is flossing important? And how are your teeth different from a wolf's or a beaver's? Have more questions about teeth? D4K host Joan Cartan-Hansen and her guest scientists, Dr. Steven Bruce and Dr. Dusty Weitz, answer students’ questions about teeth.
Problems Playing Video? | Closed Captioning