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Tooth anatomy exam > Chapter 17 Premolars teeth > Flashcards

Chapter 17 Premolars teeth Flashcards

1
Q

Permanent posterior teeth include ______

A

premolars and molars

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2
Q

Permanent premolars are the most ___ placed posterior teeth in the permanent dentition

A

Anteriorly

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3
Q

there are ___ premolars

A

eight

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4
Q

Each dental arch has ____ premolars

A

four

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5
Q

How many in each quadrant ?

A

two

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6
Q

one first premolar closet to ______/_____

A

midline/ canine

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7
Q

second premolar is closest to ____

A

first molar

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8
Q

the crown of each posterior teeth has an _____ surface as it’s masticatory surface

A

occlusal

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9
Q

this surface is bordered by the raised _____ ridges that are located on both the distal and the mesial surface

A

marginal

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10
Q

the occlusal surface also has two or more ____ with ____ descending from each cusp tip

A

cusps and cusp ridges

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11
Q

Sometimes located in the deepest parts of the fossae are the ____

A

occlusal pits

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12
Q

the complex pit and groove patterns on the occlusal surface of posterior teeth can put them at increased risk of ____

A

Caries

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13
Q

What causes caries in pits and grooves of occlusal ?

A

is due to an increased biofilm retention and the weekness of enamel that forms the walls of the pits and grooves

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14
Q

T/F all pits and groove must be checked for decay with an explorer and mirror

A

True

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15
Q

What should posterior teeth with deep pit and groove patterns that are not carious should have what applied as soon as they erupt ?

A

Enamel sealants

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16
Q

t/f depending on the dentist he may allow a carious tooth that is incipent ( early) stages to be sealed

A

true

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17
Q

What is less pronounced on the posteriors than on the anteriors ?

A

proximal surface of the CEJ curvature

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18
Q

The CEJ is often quite what for posteriors ?

A

Straight

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19
Q

What is an older term for premolars ?

A

Bicuspid

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20
Q

There are two types of premolars one type in each quad what are they ?

A

First premolar and Second premolar

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21
Q

Which two frequently has 3 cusps

A

Mandibular 2nd premolars

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22
Q

Why are the premolars called “premolars” ?

A

of it’s anterior position to the molar teeth

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23
Q

Most premolars usually have __ root

A

one

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24
Q

Which premolar usually has 2 roots ?

A

maxillary first premolar

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25
Q

what number is permanent mandibular left first premolar ?

A

21

26
Q

what is the number for permanent mandibular left second premolar ?

A

20

27
Q

what is the number for the mandibular right first premolar

A

28

28
Q

what is the number for the mandibular right second premolar ?

A

29

29
Q

what is the number for the maxillary right first premolar ?

A

5

30
Q

what number is the maxillary right second premolar

A

4

31
Q

what is the number for the maxillary left first premolars ?

A

12

32
Q

what is the maxillary left second premolar ?

A

13

33
Q

Both the premolars assist the molars in what ?

A

Grinding food during mastication with their broad occlusal surfaces

34
Q

Both premolars assist canines with what ?

A

Supporting the corners of the mouth and cheek from sagging
Cutting and tearing food with their cusps

35
Q

The buccal surfaces of all premolars develop from what ?

A

3 facial lobes and 1 lingual lobe

36
Q

A certain type of mandibular 2nd premolars may have how many lobes ?

A

2 lingual lobes

37
Q

What is the difference between premolars vs anterior teeth ?

A

Premolars have two or three occlusal cusp vs anterior teeth’s has incisal edge

38
Q

What is the facial surface of posterior teeth called ?

A

buccall

39
Q

What are the chewing surface of posterior teeth called ?

A

occlusal

40
Q

Most premolars have one root, which premolar has 2 roots

A

maxillary first premolar

41
Q

Are both premolars succedaneous or non succedaneous ?

A

succedaneous

41
Q

t/f whether one or two roots are present, they have proximal root concavities

A

true

42
Q

Which tooth does both premolar teeth replace ?

A

Molar

43
Q

why might a orthodontist extract a permanent premolar in each quadrant ?

A

To improve dental arch spacing

44
Q

Which premolars are usually extracted more than the other one ?

A

1st premolars are usally extracted more often than 2nd premolars

45
Q

What is the calcification of the maxillary 1st premolar ?

A

1 1/2 years

46
Q

what is the completion of crown for the maxillary 1st premolar ?

A

5-6 years

47
Q

what is the eruption date for maxillary 1st premolar ?

A

10 -11

48
Q

what is the root completion for maxillary 1st premolar ?

A

12 and 13

49
Q

Maxillary 1st premolars erupt distal to the what on their arch space ?

A

Distal to primary maixillary canines

50
Q

maxillary 1st premolars are succedaneous replacements of the what ?

A

Primary maxillary 1st molars

51
Q

What is the calcification of the maxillary 2nd premolar ?

A

2 to 2 1/2 years

52
Q

what is the completion of crown for the maxillary 2nd premolars ?

A

6-7 years

53
Q

what is the eruption dates for the maxillary 2nd premolars ?

A

10-12 yrs

54
Q

what is the root completion of maxillary 2nd premolars ?

A

12-14 yrs

55
Q

The maxillary 2nd premolars erupt distal to what teeth ?

A

erupts distal to the permanent maxillary first premolars

56
Q

Maxillary 2nd premolars are succedaneous replacement of what tooth ?

A

primary maxillary second premolars

57
Q

which maxillary premolar erupt first ?

A

Maxillary 1st premolar

58
Q

Which tooth are the ONLY tooth to erupt before their mandibular counterpart ?

A

Maxillary premolars

59
Q
A

Tooth anatomy exam (1 decks)

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