system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are teeth the only bone we get baby and adult versions of?
gpt
Teeth are not bones they are made of completely different cells. Adult teeth would not be able to fit inside a babies mouth. A toddler with full primary “baby” dentition has 20 teeth. An adult, wisdom teeth included has 32. Contrary to popular belief you are not born with all of your teeth at once, the permanent teeth grow and develop under the baby teeth at varying ages. Baby teeth are very small as you grow and develop you need teeth that also bigger and can accommodate your larger jaw.