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Dental Development

Over the course of our lifetime, we generally develop 20 primary teeth, followed by 32 permanent teeth. Teeth are divided into four categories:
                        • Incisors
                        • Canines
                        • Premolars
                        • Molars

Adults have 8 incisors, 4 canines, 8 premolars and 12 molars, including 4 wisdom teeth.

The first teeth that come in during childhood are the incisors. In the lower jaw, they appear between the ages of 6 and 10 months, and in the upper jaw, between the ages of 7 and 12 months.

All 20 primary teeth come in by the time a child is 2 or 3 years old, and some of them remain until the child reaches age 12.

Eruption and loss of primary teeth

rs200 soin prev enfants
Upper jawEruptionLoss
Central incisorsBetween 7 and 12 monthsBetween 6 and 8 years
Lateral incisorsBetween 9 and 13 monthsBetween 6 and 8 years
CaninesBetween 16 and 22 monthsBetween 10 and 12 years
First molarsBetween 13 and 19 monthsBetween 9 and 11 years
Second molarsBetween 25 and 33 monthsBetween 10 and 12 years
Lower jawEruptionLoss
Second molarsBetween 20 and 31 monthsBetween 10 and 12 years
First molarsBetween 13 and 19 monthsBetween 9 and 11 years
CaninesBetween 16 and 23 monthsBetween 9 and 12 years
Lateral incisorsBetween 7 and 16 monthsBetween 7 and 8 years
Central incisorsBetween 6 and 10 monthsBetween 6 and 8 years

Eruption of permanent teeth

brossage dents
Upper jawEruption
Central incisorsBetween 7 and 8 years
Lateral incisorsBetween 8 and 9 years
CaninesBetween 11 and 12 years
First premolarsBetween 10 and 11 years
Second premolarsBetween 10 and 12 years
First molarsBetween 6 and 7 years
Second molarsBetween 12 and 13 years
Third molars (wisdom teeth)Between 17 and 21 years
Lower jawEruption
Third molars (wisdom teeth)Between 17 and 21 years
Second molarsBetween 11 and 13 years
First molarsBetween 6 and 7 years
Second premolarsBetween 11 and 12 years
First premolarsBetween 10 and 12 years
CaninesBetween 9 and 10 years
Lateral incisorsBetween 7 and 8 years
Central incisorsBetween 6 and 7 years