Did you know that human teeth have 4 layers? The enamel is the hardest outer layer of the tooth. Dentin helps to support and connect the enamel to the center layer of the tooth. Cementum is a bone-like layer that protects the root of the tooth. And, the pulp (also known as the root) contains the blood vessels and nerves for the tooth.
When your adult tooth starts to grow in, it wears down and dissolves the root of your baby tooth. Once the root of the baby tooth is gone, it loosens and falls out easily.
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