Tooth functions and terms

Question 1

Crown covered by what

Answer 1

enamel

Question 2

root portion is covered by what

Answer 2

cementum

Question 3

what is anatomic crown

Answer 3

whole crown of the tooth is covered by enamel

Question 4

what is clinical crown

Answer 4

the part seen above gingiva

Question 5

Bifurcation

Answer 5

two root

Question 6

Trifurcation

Answer 6

three root

Question 7

Alveolar process

Answer 7

Portion of the jaw that supports the teeth

Question 8

What is the 3 factors that determine the colour of enamel

Answer 8

Mineralization
thickness
skin pigmentation

Question 9

Enamel function

Answer 9

resistant to wear
resistant to bacteria
resistant to mild acids
resistant to tooth decay

Question 10

What densely packed enamel do

Answer 10

gives the crown of the tooth a self-cleaning service

Prevent food particles and bacteria adhere (粘附) to the surface of tooth crown

Question 11

Dentin

Answer 11

Greatest bulk of the tooth because it forms the largest portion of the crown and root

yellowish and elastic

capable of adding to itself

Question 12

Secondary dentin

Answer 12

Form throughout the pulp chamber after tooth eruption

In time, it completely fill the pulp chamber

Question 13

Reparative dentin

Answer 13

Located at the dentin, reaction to dental caries or trauma

Question 14

Function of cementum

Answer 14

Provide a medium for the attachment of the tooth to alveolar bone

Question 15

What is cementum

Answer 15

Bonelike substance that covers the root

Question 16

Union of cementum and dentin is called

Answer 16

Dentino- cemental junction

Question 17

What is the two types of cementum

Answer 17

Cellular cementum
Acellular cementum

Question 18

Pulp function

Answer 18

Nourishing （滋养）
sensory
Dentin-reparative system of tooth

Question 19

Incisors function

Answer 19

Cut

Question 20

Canines function

Answer 20

holding or grasping the teeth
protect the jaw joint during side jaw movement

Question 21

Premolars function

Answer 21

Help in grind

Question 22

Molars function

Answer 22

chew or grind up food

Question 23

What molars cusps do

Answer 23

interlock the upper and lower molars

Question 24

What is lingual surface

Answer 24

Tooth that faces the tongue

Question 25

labial surface

Answer 25

Anterior tooth that facing the lip

Question 26

Buccal surface

Answer 26

Posterior tooth that facing the cheek

Question 27

Proximal surface

Answer 27

surface of a tooth faces the neighboring tooth's surface in the same arch

Question 28

What is the two proximal surface

Answer 28

mesial distal

Question 29

Mesial proximal surface

Answer 29

Closest to midline of the face

Question 30

Distal proximal surface

Answer 30

Faces away from the midline

Question 31

Fifth surface of posterior teeth

Answer 31

occlusal surface / biting surface of the tooth

Question 32

What is Lobes

Answer 32

Developed 4 or more growth centers when crowns are formed

Question 33

Developmental grooves

Answer 33

shallow grooves or lines that separate primary parts of crown or root

Question 34

Transverse ridge

Answer 34

union of 2 triangular ridges, buccal and lingual that cross the occlusal surface of a posterior tooth

Question 35

Lingual groove

Answer 35

Developmental line that separates fourth lobe of anterior tooth from the labial lobes

Question 36

Fourth lobe of the anterior teeth is what?

Answer 36

cingulum

Question 37

tubercle

Answer 37

small elevation on tooth

Question 38

cusps

Answer 38

mountain on crown portion of the tooth makes up a major division of its occlusal or incisal surface

Question 39

cusps only found at?

Answer 39

pre molar molar canines

Question 40

Fossa

Answer 40

an area on the tooth that is concave

Question 41

Pit

Answer 41

depression on fossa or anywhere on the tooth, but usually occur along the developmental groove or in fossa

Question 42

ridge

Answer 42

elevated portion of a tooth that runs in a line

Question 43

Marginal ridges

Answer 43

rounded borders of enamel that form at the mesial and distal shoulders

Question 44

Alveolus

Answer 44

bony socket in which the tooth fits in

Question 45

The crown and root are joined at the？

Answer 45

Cemento-enamel junction