Special | 28m 49s
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.
Aired: 02/19/08Video has closed captioning.
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Laura Moore Cunningham Foundation