Merck Manual

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Tooth Eruption Times

Tooth Eruption Times

Teeth

Number

Age at Eruption*

Deciduous (20 total)

Lower central incisors

2

5–9 months

Upper central incisors

2

8–12 months

Upper lateral incisors

2

10–12 months

Lower lateral incisors

2

12–15 months

1st molars†

4

10–16 months

Canines

4

16–20 months

2nd molars†

4

20–30 months

Permanent (32 total)

1st molars†

4

5–7 years

Incisors

8

6–8 years

Bicuspids

8

9–12 years

Canines

4

10–13 years

2nd molars†

4

11–13 years

3rd molars†

4

17–25 years

* The age at eruption varies greatly.