| 6 to 10 months |
Most infants cut their first tooth. |
| 10 months to 3 years |
Infants, toddlers and preschoolers continue to get their lower then upper primary teeth starting in the center of the mouth and working backwards. |
| 3 years |
Most of a child’s 20 baby teeth are in. |
| 6 years |
Children begin to shed their baby teeth and permanent teeth begin to erupt. |
| 12-13 years |
Most baby teeth have been shed and almost all permanent teeth are in. |
| 21 years |
Most adults have all of their permanent teeth including third molars (wisdom teeth).
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