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Basic Oral science > Tooth functions and terms > Flashcards

Tooth functions and terms Flashcards

1
Q

Crown covered by what

A

enamel

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2
Q

root portion is covered by what

A

cementum

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3
Q

what is anatomic crown

A

whole crown of the tooth is covered by enamel

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4
Q

what is clinical crown

A

the part seen above gingiva

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5
Q

Bifurcation

A

two root

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6
Q

Trifurcation

A

three root

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7
Q

Alveolar process

A

Portion of the jaw that supports the teeth

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8
Q

What is the 3 factors that determine the colour of enamel

A

Mineralization
thickness
skin pigmentation

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9
Q

Enamel function

A

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

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10
Q

What densely packed enamel do

A

gives the crown of the tooth a self-cleaning service

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

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11
Q

Dentin

A

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

yellowish and elastic

capable of adding to itself

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12
Q

Secondary dentin

A

Form throughout the pulp chamber after tooth eruption

In time, it completely fill the pulp chamber

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13
Q

Reparative dentin

A

Located at the dentin, reaction to dental caries or trauma

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14
Q

Function of cementum

A

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

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15
Q

What is cementum

A

Bonelike substance that covers the root

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16
Q

Union of cementum and dentin is called

A

Dentino- cemental junction

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17
Q

What is the two types of cementum

A

Cellular cementum
Acellular cementum

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18
Q

Pulp function

A

Nourishing （滋养）
sensory
Dentin-reparative system of tooth

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19
Q

Incisors function

A

Cut

20
Q

Canines function

A

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

21
Q

Premolars function

A

Help in grind

22
Q

Molars function

A

chew or grind up food

23
Q

What molars cusps do

A

interlock the upper and lower molars

24
Q

What is lingual surface

A

Tooth that faces the tongue

25
Q

labial surface

A

Anterior tooth that facing the lip

26
Q

Buccal surface

A

Posterior tooth that facing the cheek

27
Q

Proximal surface

A

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

28
Q

What is the two proximal surface

A

mesial
distal

29
Q

Mesial proximal surface

A

Closest to midline of the face

30
Q

Distal proximal surface

A

Faces away from the midline

31
Q

Fifth surface of posterior teeth

A

occlusal surface / biting surface of the tooth

32
Q

What is Lobes

A

Developed 4 or more growth centers when crowns are formed

33
Q

Developmental grooves

A

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

34
Q

Transverse ridge

A

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

35
Q

Lingual groove

A

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

36
Q

Fourth lobe of the anterior teeth is what?

A

cingulum

37
Q

tubercle

A

small elevation on tooth

38
Q

cusps

A

mountain on crown portion of the tooth

makes up a major division of its occlusal or incisal surface

39
Q

cusps only found at?

A

pre molar
molar
canines

40
Q

Fossa

A

an area on the tooth that is concave

41
Q

Pit

A

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

42
Q

ridge

A

elevated portion of a tooth that runs in a line

43
Q

Marginal ridges

A

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

44
Q

Alveolus

A

bony socket in which the tooth fits in

45
Q

The crown and root are joined at the？

A

Cemento-enamel junction

Basic Oral science (5 decks)

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