Tooth composition

Question 1

What is the name given to the part of a tooth that is visible in the mouth?

Answer 1

Crown

Question 2

What name is given to the part of a tooth which lies under the gingivae and anchors the tooth to it supporting structures?

Answer 2

Root

Question 3

What name is given to the area where the crown meets the root?

Answer 3

Neck

Question 4

What name is given to the tip of a root?

Answer 4

Apex

Question 5

What calcified tissue covers the outer layer of the crown only of a tooth?

Answer 5

Enamel

Question 6

What calcified tissue forms the bulk of the crown and root of a tooth?

Answer 6

Dentine

Question 7

What calcified tissue forms the outer layer of the root only of a tooth?

Answer 7

Cementum

Question 8

What cells form enamel?

Answer 8

Ameloblasts

Question 9

What cells form dentine?

Answer 9

Odontoblasts

Question 10

What are the main mineral crystals of enamel called?

Answer 10

Calcium Hydroxyapatite

Question 11

Name the junction where the enamel and dentine meet?

Answer 11

Amelodentinal Junction (ADJ)

Question 12

Enamel is sensitive? True or false.

Answer 12

False

Question 13

Can enamel remineralise itself? True or false.

Answer 13

True

Question 14

Name the junction where the enamel meets the cementum at the neck of a tooth?

Answer 14

Junctional Epithelium

Question 15

Which cells form cementum?

Answer 15

Cementoblasts

Question 16

Dentine is composed of dentinal hollow tubules, what is the name of the sensory nerve endings that run from the pulp through the tubules?

Answer 16

Dentinal Fibrils

Question 17

Is dentine sensitive?

Answer 17

Yes - dentinal tubules/fibrils

Question 18

Can dentine repair itself?

Answer 18

Yes - laying down of secondary dentine (odontoblasts)

Question 19

What lines the outer surface of the pulpal chamber?

Answer 19

Odontoblasts

Question 20

Where do the pulpal tissues enter a tooth?

Answer 20

Apical Foramen