Human Teeth Replacement: Understanding Primary and Permanent Sets

Humans develop only two sets of teeth:

1. Primary (Deciduous) Teeth: 20 teeth; erupt ~6 months, shed ~ages 5–6.
2. Permanent Teeth: 32 teeth (including wisdom teeth); begin erupting ~age 6, complete by early 20s.

No further natural tooth regeneration occurs after the permanent set.