At birth people usually have 20 primary (baby) teeth, which often erupt through the gums as early as six months of age. These teeth are then shed at various times throughout childhood. By age 21, all 32 of the permanent teeth have usually erupted.

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Getting to know your teeth is fun! Learn all about your teeth with our fun, interactive, and educational diagrams:

Anatomy of a Tooth








Know Your Teeth

Age: 6-10 months

Primary lower central incisors erupt.

Age: 8-12 months

Primary upper central incisors erupt.

Age: 9-16 months

Primary upper & lower lateral incisors erupt.

Age: 13-19 months

First molars erupt. The upper molars generally erupt before the lower molars. Average age of shed: 9-11 years.

Age: 16-23 months

Canines erupt. The upper canines generally erupt before the lower canines. Average age of shed: 9-12 years.

Age: 23-33 months

Second molars erupt. Generally the lower molars erupt first, followed by the upper molars. Average age of shed: 10-12 years.

Age: 6-7 years

The primary upper and lower central incisors are shed, and the permanent upper and lower first molars and lower central incisors erupt.

Age: 7-8 years

The primary upper and lower lateral incisors are shed, and the permanent upper central incisors and lower lateral incisors erupt.

Age: 8-9 years

The permanent upper lateral incisors erupt and the primary upper first molars are shed.

Age: 9-10 years

The primary upper and lower canines and the lower first molars are shed, and the permanent lower canines erupt.

Age: 10-12 years

The primary upper and lower 2nd molars are shed, and the permanent upper canines erupt, as well as upper and lower first and second premolars.

Age: 11-13 years

The permanent upper and lower 2nd molars erupt.

Age: 17-21 years

The upper and lower 3rd molars (or wisdom teeth) erupt.

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