Why do baby teeth fall out?

Baby teeth fall out because big teeth push up. The little teeth get wiggly. Then they come out. A new tooth can show.

Baby teeth fall out because big teeth are growing under them. The big tooth slowly pushes up. This makes the baby tooth’s tiny root get smaller, so the tooth gets wiggly. Then it can fall out. It is like a new plant pushing up through the dirt and making room to grow.

Baby teeth fall out because adult teeth grow underneath them. As an adult tooth moves up, special cells slowly take away the baby tooth’s root, which is the hidden part holding it in the gum. With less root to hold it, the baby tooth gets wiggly and falls out. Then the adult tooth can come in. Fun fact: most kids have 20 baby teeth, but adults usually have 32 teeth.