Tooth Identification And Chronology

Question 1

Eruption date of upper 1’s?

Answer 1

7.5 years

Question 2

Eruption date of upper 2’s?

Answer 2

8.5 years

Question 3

Eruption date of upper 3’s?

Answer 3

11.5 years

Question 4

Eruption dates of upper 4’s?

Answer 4

10-11 years

Question 5

Eruption dates of upper 5’s?

Answer 5

10-12 years

Question 6

Eruption date of upper 6’s?

Answer 6

6 years

Question 7

Eruption date of upper 7’s?

Answer 7

12-13 years

Question 8

Eruption date of upper and lower 8’s?

Answer 8

17+ years

Question 9

Eruption date of lower 1’s?

Answer 9

6.5 years

Question 10

Eruption date of lower 2’s?

Answer 10

7.5 years

Question 11

Eruption date of lower 3’s?

Answer 11

10.5 years

Question 12

Eruption dates of lower 4’s?

Answer 12

10-12 years

Question 13

Eruption dates of lower 5’s?

Answer 13

11-12 years

Question 14

Eruption date of lower 6’s?

Answer 14

6 years

Question 15

Eruption date of lower 7’s?

Answer 15

12-13 years

Question 16

How many years does it take for the root to fully form after eruption of the tooth?

Answer 16

3 years

Question 17

What age does an upper incisor develop?

Answer 17

3-4 months

Question 18

At what age should we be able to palate a canine?

Answer 18

9 years

Question 19

What sequence does the permanent dentition erupt? (Upper arch)

Answer 19

6 - 1 - 2 - 4 - 5 - 3 - 7 - 8

Question 20

What sequence does the permanent dentition erupt?

Answer 20

6 - 1 - 2 - 3 - 4 - 5 - 7 - 8

Question 21

What tooth sometimes has an extra cusp?

Answer 21

• 1st molar - cusp of caribelli

* upper incisor - talon cusp