Tooth Morphology and Eruption Dates

Question 1

Eruption dates of maxillary 1st molars

Answer 1

6-7 years

Question 2

Eruption dates of maxillary central incisors

Answer 2

7-8 years

Question 3

Eruption dates of maxillary lateral incisors

Answer 3

8-9 years

Question 4

Eruption dates of maxillary 1st premolars

Answer 4

10-11 years

Question 5

Eruption dates of maxillary 2nd premolars

Answer 5

10-12 years

Question 6

Eruption dates of maxillary canines

Answer 6

11-12 years

Question 7

Eruption dates of maxillary 2nd molars

Answer 7

12-13 years

Question 8

Eruption dates of maxillary 3rd molars

Answer 8

17-21 years

Question 9

Eruption dates of mandibular 1st molars

Answer 9

6-7 years

Question 10

Eruption dates of mandibular central incisors

Answer 10

6-7 years

Question 11

Eruption dates of mandibular lateral incisors

Answer 11

7-8 years

Question 12

Eruption dates of mandibular canines

Answer 12

9-10 years

Question 13

Eruption dates of mandibular 1st premolars

Answer 13

10-12 years

Question 14

Eruption dates of mandibular 2nd premolars

Answer 14

11-12 years

Question 15

Eruption dates of mandibular 2nd molars

Answer 15

11-13 years

Question 16

Eruption dates of mandibular 3rd molars

Answer 16

17-21 years

Question 17

How old is a child whose permanent mandibular canines have come through?

Answer 17

9-10 years

Question 18

How old is a child whose permanent mandibular and maxillary canines have come through?

Answer 18

11-12 years

Question 19

How many roots does UR4 have?

Answer 19

2 roots

Question 20

How many roots does LL5 have?

Answer 20

1 root

Question 21

How many roots does LL4 have?

Answer 21

1 root

Question 22

Which tooth has a canine fossa and on which aspect?

Answer 22

U4’s on mesial aspect

Question 23

How many roots does UR5 have?

Answer 23

1 root

Question 24

How many roots does UL7 have?

Answer 24

3 roots

Question 25

How many roots does LR6 have?

Answer 25

2 roots

Question 26

How many roots does LL7 have?

Answer 26

2 roots

Question 27

Which tooth with 4 cusps looks like a hot cross bun on the occlusal surface?

Answer 27

L7’s

Question 28

Which tooth has an obvious oblique ridge and which aspects of the tooth is it between?

Answer 28

U6’s - mesiopalatal to distobuccal

Question 29

Which tooth has a cusp of carabelli?

Answer 29

U6’s

Question 30

Which pre-molars have 3 cusps? How many buccal and how many palatal?

Answer 30

L5’s - one buccal and two palatal (Y-shaped fissure)

Question 31

Which aspect of the tooth is the cusp of carabelli found?

Answer 31

Found on the mesiopalatal cusp of U6’s