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Flashcards in Permanent Maxillary Premolars Deck (77):
1

T or F:

posterior teeth have longer crowns cervico-distally

false

shorter crowns

2

T or F:

posterior teeth have greater buccolingual measurement compared to mesiodistal

true

3

do posterior teeth have broader or narrower contact areas than anterior teeth?

broader, and the contact areas are more nearly at the same level

4

T or F:

posterior teeth have a greater curvature of cervical line mesial and distal compared to anterior teeth

false:

they have less of a curvature 

5

which numbers represent the maxillary and mandibular permanent premolars?

  • maxillary: 4, 5, 12, 13
  • mandibular: 20, 21, 28, 29

6

what is a misconception about the name of bicuspids?

the number of cusps varies from 1-3; not always 2 ("bi")

7

maxillary premolars develop from how many lobes?

4; same as anterior teeth

8

T or F:

maxillary premolars resemble canines when viewed from the buccal

true

9

buccal cusp of the first premolar is ____ and ____ and is used for _______ food.

  • long
  • sharp
  • tearing

10

2nd premolar has a cusp that is _____ sharp which makes this tooth _____ efficient in grinding

  • less
  • more

11

are the crown and root of premolars longer or shorter than those of the canine?

shorter

12

marginal ridges of maxillary premolars are more ______ due to cusp development _____ and _____, and thus become part of the occlusal surface

  • horizontal
  • bucally
  • lingually

13

how many roots and pulp canals do maxillary first premolars usually have?

2 roots and 2 canals, even when only one root appears present

14

is the buccal or lingual cusp of the maxillary first premolar longer?

buccal is 1mm longer than lingual

15

T or F:

contact areas of maxillary permanent first premolar mesial and distal are at different levels

false:

same level

16

is the mesial slope of the buccal cusp of the maxillary permanent first premolar shorter or longer than the distal?

longer (opposite of canine)

17

maxillary permanent first premolar roots will be ______mm shorter than canine

3-4mm

18

maxillary premanent first premolar will have developmental depressions ____ and ____ to the ridge

mesial and distal

19

 in the maxillary premanent first premolar, the _____ cusp is long and fairly pointed before wear, and ____ surface is convex showing a strong buccal ridge

buccal, buccal

20

what is the shape of the maxillary premanent first premolar from the buccal aspect?

trapezoidal

21

in the maxillary premanent first premolar, there is very _____ curvature of the cervical line with the crest of the curve near the center of the root.

little

22

in the buccal aspect of the maxillary premanent first premolar, the mesial outline is _____ from the cervical line to the contact area, and the mesial slope of the buccal cusp is ____ and ____, with a possible ____.

  • concave
  • straight
  • long
  • notch

23

in the buccal aspect of the maxillary premanent first premolar, the distal outline is more _____ to slightly _____, and the contact area curve is ____ broad than mesial

  • straight
  • concave
  • more

24

in the lingual aspect of the maxillary premanent first premolar, the crown tapers to the ____, and the ____ cusp is _____ mesiodistal than the buccal

  • lingual
  • lingual
  • narrower

25

from the lingual aspect of the maxillary premanent first premolar, the lingual cusp is ____ and ____, making the lingual surface ____.

  • smooth
  • spheroidal
  • convex

26

from the lingual aspect of the maxillary premanent first premolar, may have a lingual ridge just at the ____ tip.

cusp

27

from the lingual aspect of the maxillary premanent first premolar, the cervical line is a ____ curve with a slight curve toward the ____

  • regular
  • root

28

from the lingual aspect of the maxillary premanent first premolar, you can see both cusps due to what?

shorter lingual cusp

29

T or F:

the lingual portion of the root of the maxillary premanent first premolar is smooth at all points

true, and the apex of the lingual root may be more blunt than the buccal

30

from the mesial view of the maxillary premanent first premolar, the lingual cusp tip is most often in line with which border of the lingual root?

the lingual border

31

from the mesial aspect of the maxillary premanent first premolar, the buccal outline of the buccal root is ____ and tends toward the ____

  • straight
  • lingual

32

from the mesial aspect of the maxillary premanent first premolar, the lingual outline of the lingual root is fairly _____, and the root trunk is ____

  • straight
  • long

33

from the mesial aspect of the maxillary premanent first premolar, when only one root is found, the developmental depression is found where?

all along the root

34

from the mesial aspect of the maxillary premanent first premolar, just cervical to the contact area, centered is a depression called the ____ _____ ____, and is note found on 2nd premolars

mesial developmental depression

35

the mesial developmental depression of the maxillary premanent first premolar extends onto the surface extending and ends at the ____

bifurcation

36

from the mesial aspect of the maxillary premanent first premolar, a groove in the enamel in the marginal ridge in line with the mesial developmental depression is found, and is called what? 

mesial marginal developmental groove

37

the occlusal aspect of the maxillary premanent first premolar shows a _____ shape, connecting which surfaces?

  • hexagonal (6)
  • mesiobuccal, mesiolingual, distolingual, distobuccal, distal, mesial

38

describe the length of the sides of surfaces from the occlusal aspect of the maxillary premanent first premolar

  • two buccal sides are almost equal
  • mesial shorter than distal
  • mesiolingual shorter than distolingual

39

from the occlusal aspect of the maxillary premanent first premolar, the crest of the distal contact area is more ____ than the mesial, and the crest of the buccal ridge is more ____ than the lingual

  • buccal
  • distal

40

the occlusal surface of the maxillary premanent first premolar is bound by ____ ridges and ____ ridges

  • cusp
  • marginal

41

from the occlusal aspect of the maxillary premanent first premolar, m-b and d-b cusp ridges are _______, and the d-b ridge is more ____

  • in line with each other
  • buccal

42

from the mesial aspect of the maxillary premanent first premolar, the shape is ____ with the longest part at _____

  • trapezoid
  • cervical

43

from the mesial aspect of the maxillary premanent first premolar, the tips of cusps are within the confines of the ____ ____

root trunk

44

from the mesial aspect of the maxillary premanent first premolar, the cervical line may be ____ or ____

regular or irregular

45

from the mesial aspect of the maxillary premanent first premolar, the crest of curvature on the buccal is ath the junction of the ____ and ____ thirds

cervical and middle thirds

46

from the mesial aspect of the maxillary premanent first premolar, the lingual outline is a ____ curve from cervical line to cusp tip, with crest at the ________.

  • smooth
  • middle of the middle third

47

from the distal aspect of the maxillary premanent first premolar, the crown surface is all ____ with slight flat area ____ to the contact area

  • convex
  • cervical

48

from the distal aspect of the maxillary premanent first premolar, compared to the mesial aspect, the curvature is ____ on the distal

less

49

from the distal aspect of the maxillary premanent first premolar, there is not a __________ crossing the marginal ridge

deep developmental groove

50

from the distal aspect of the maxillary premanent first premolar, the root trunk is ____

flat

51

from the distal aspect of the maxillary premanent first premolar, the bifurcation is abrupt, with ______ as found on the mesial

no grooves

52

the maxillary 2nd premolar is _____ rounded than the first, and ____ angular in all aspects

  • more
  • less

53

the maxillary 2nd premolar has how many roots?

a single root

54

the maxillary 2nd premolar will have more or less variations than the first premolar?

more variations

55

the maxillary 2nd premolar crown is uaually ____ in all dimensions than the first premolar, but can also be ____

  • smaller
  • large

56

T or F:

the maxillary 2nd premolar root may be as great or even longer than the first premolar

true

57

describe the chorology of the maxillary 2nd premolar

  • first evidence of calcification: 2-2.5 years
  • enamel completed: 6-7 years
  • eruption: 10-12 years
  • root completion: 12-14 years

58

from the buccal aspect of the maxillary 2nd premolar, the buccal cusp is how long compared to the 2st premolar? and it is more or less pointed?

  • may not be as long as the 1st premolar
  • cusp is less pointed

59

from the buccal aspect of the maxillary 2nd premolar, the mesial slope of the buccal cusp ridge is ____ than the distal

shorter

60

from the buccal aspect of the maxillary 2nd premolar, the crown and root may be ____ at cervical portion than 1st premolar

thicker

61

from the buccal aspect of the maxillary 2nd premolar, the buccal ridge is ____ prominent

less

62

from the lingual aspect of the maxillary 2nd premolar, the lingual cusp is ___ than 1st premolar, giving the appearance of a ____ crown

  • longer
  • longer

63

from the mesial aspect of the maxillary 2nd premolar, there is ____ distance between cusp tips, giving ____ occlusal surface mesiodistally

  • greater
  • wider

64

from the mesial aspect of the maxillary 2nd premolar, there is no developmental depression seen on the ____ surface, and is ____ instead

  • mesial
  • convex

65

from the mesial aspect of the maxillary 2nd premolar, there will be a _________ on the single root

shallow depression

66

from the mesial aspect of the maxillary 2nd premolar, no deep developmental groove crossing the ___________

mesial marginal ridge

67

from the mesial aspect of the maxillary 2nd premolar, the geometric outline is ____

trapezoidal

68

from the distal aspect of the maxillary 2nd premolar, the distal root depression is _____ than the mesial depression

deeper, which is opposite of the 1st premolar

69

from the occlusal aspect of the maxillary 2nd premolar, the outline of the crown is more ______-____, rather than angular

rounded-oval

70

from the occlusal aspect of the maxillary 2nd premolar, the central groove is _____ with more supplemental grooves radiating ___

  • shorter
  • out
  • this gives a wrinkled appearance

71

the permanent maxillary 2nd premolar may have 2 canals from the _____ aspect, and the _____ pulp horn is most prominent

  • buccolingual aspect
  • buccal pulp horn

72

the permanent maxillary 2nd premolar pulp chamber floor is ____ the cervical level

below

73

the permanent maxillary 2nd premolar mesiodistal dimension of the pulp chamber tapers from ____ to ____

occlusal to apical

74

the permanent maxillary 2nd premolar pulp cavity in the cervical region is ____ shaped

kidney

75

the permanent maxillary 2nd premolar usually has how many roots/canals?

one

76

the permanent maxillary 2nd premolar has well developed pulp horns, with a broad chamber in what direction?

buccolingual

77

the permanent maxillary 2nd premolar pulp cavity is narrow in what direction?

mesiodistally