Dental Development

• • • • • • • • • • • • 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

		Upper jaw	Eruption	Loss
		Central incisors	Between 7 and 12 months	Between 6 and 8 years
		Lateral incisors	Between 9 and 13 months	Between 6 and 8 years
		Canines	Between 16 and 22 months	Between 10 and 12 years
		First molars	Between 13 and 19 months	Between 9 and 11 years
		Second molars	Between 25 and 33 months	Between 10 and 12 years
		Lower jaw	Eruption	Loss
		Second molars	Between 20 and 31 months	Between 10 and 12 years
		First molars	Between 13 and 19 months	Between 9 and 11 years
		Canines	Between 16 and 23 months	Between 9 and 12 years
		Lateral incisors	Between 7 and 16 months	Between 7 and 8 years
		Central incisors	Between 6 and 10 months	Between 6 and 8 years

Eruption of permanent teeth

		Upper jaw	Eruption
		Central incisors	Between 7 and 8 years
		Lateral incisors	Between 8 and 9 years
		Canines	Between 11 and 12 years
		First premolars	Between 10 and 11 years
		Second premolars	Between 10 and 12 years
		First molars	Between 6 and 7 years
		Second molars	Between 12 and 13 years
		Third molars (wisdom teeth)	Between 17 and 21 years
		Lower jaw	Eruption
		Third molars (wisdom teeth)	Between 17 and 21 years
		Second molars	Between 11 and 13 years
		First molars	Between 6 and 7 years
		Second premolars	Between 11 and 12 years
		First premolars	Between 10 and 12 years
		Canines	Between 9 and 10 years
		Lateral incisors	Between 7 and 8 years
		Central incisors	Between 6 and 7 years