A new study reveals that the sensitivity of teeth, which makes them zing in a dentist's chair or ache after biting into something cold, can be traced back to the exoskeletons of ancient, armored fish.

(CNN) — The sensitive interior of human teeth might have originated from a seemingly unlikely place: sensory tissue in fish that were swimming in Earth’s oceans 465 million years ago. While our teeth ...

Mamelons are the small bumps on your four front teeth called incisors. They usually appear as a group of three and wear down as you age. Mamelons don't need any special treatment. They give your teeth ...