Did You Know!
Your Enamel Is Tougher Than Steel — But Can’t Repair Itself
The enamel that coats your teeth is the hardest substance in the human body, even stronger than bone and tougher than many types of steel.
- However, unlike bone, enamel has no living cells, so once it’s damaged, your body cannot naturally repair it.
- This is why cavities must be filled by a dentist — your teeth can’t heal themselves like a broken arm can.
Fun twist: This incredible strength is also why ancient teeth are often perfectly preserved in fossils, even when the rest of the skeleton has crumbled away.
