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Dental Anatomy > Permanent Maxillary Premolars > Flashcards

Permanent Maxillary Premolars Flashcards

1
Q

T or F:

posterior teeth have longer crowns cervico-distally

A

false

shorter crowns

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2
Q

T or F:

posterior teeth have greater buccolingual measurement compared to mesiodistal

A

true

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3
Q

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

A

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

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4
Q

T or F:

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

A

false:

they have less of a curvature

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5
Q

which numbers represent the maxillary and mandibular permanent premolars?

A
  • maxillary: 4, 5, 12, 13
  • mandibular: 20, 21, 28, 29
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6
Q

what is a misconception about the name of bicuspids?

A

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

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7
Q

maxillary premolars develop from how many lobes?

A

4; same as anterior teeth

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8
Q

T or F:

maxillary premolars resemble canines when viewed from the buccal

A

true

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9
Q

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

A
  • long
  • sharp
  • tearing
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10
Q

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

A
  • less
  • more
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11
Q

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

A

shorter

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12
Q

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

A
  • horizontal
  • bucally
  • lingually
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13
Q

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

A

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

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14
Q

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

A

buccal is 1mm longer than lingual

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15
Q

T or F:

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

A

false:

same level

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16
Q

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

A

longer (opposite of canine)

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17
Q

maxillary permanent first premolar roots will be ______mm shorter than canine

A

3-4mm

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18
Q

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

A

mesial and distal

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19
Q

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

A

buccal, buccal

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20
Q

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

A

trapezoidal

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21
Q

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.

A

little

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22
Q

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 ____.

A
  • concave
  • straight
  • long
  • notch
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23
Q

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

A
  • straight
  • concave
  • more
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24
Q

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

A
  • lingual
  • lingual
  • narrower
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25
Q

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

A
  • smooth
  • spheroidal
  • convex
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26
Q

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

A

cusp

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27
Q

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

A
  • regular
  • root
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28
Q

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

A

shorter lingual cusp

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29
Q

T or F:

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

A

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

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30
Q

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?

A

the lingual border

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31
Q

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

A
  • straight
  • lingual
32
Q

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

A
  • straight
  • long
33
Q

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

A

all along the root

34
Q

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

A

mesial developmental depression

35
Q

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

A

bifurcation

36
Q

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?

A

mesial marginal developmental groove

37
Q

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

A
  • hexagonal (6)
  • mesiobuccal, mesiolingual, distolingual, distobuccal, distal, mesial
38
Q

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

A
  • two buccal sides are almost equal
  • mesial shorter than distal
  • mesiolingual shorter than distolingual
39
Q

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

A
  • buccal
  • distal
40
Q

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

A
  • cusp
  • marginal
41
Q

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 ____

A
  • in line with each other
  • buccal
42
Q

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

A
  • trapezoid
  • cervical
43
Q

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

A

root trunk

44
Q

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

A

regular or irregular

45
Q

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

A

cervical and middle thirds

46
Q

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 ________.

A
  • smooth
  • middle of the middle third
47
Q

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

A
  • convex
  • cervical
48
Q

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

A

less

49
Q

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

A

deep developmental groove

50
Q

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

A

flat

51
Q

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

A

no grooves

52
Q

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

A
  • more
  • less
53
Q

the maxillary 2nd premolar has how many roots?

A

a single root

54
Q

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

A

more variations

55
Q

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

A
  • smaller
  • large
56
Q

T or F:

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

A

true

57
Q

describe the chorology of the maxillary 2nd premolar

A
  • first evidence of calcification: 2-2.5 years
  • enamel completed: 6-7 years
  • eruption: 10-12 years
  • root completion: 12-14 years
58
Q

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?

A
  • may not be as long as the 1st premolar
  • cusp is less pointed
59
Q

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

A

shorter

60
Q

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

A

thicker

61
Q

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

A

less

62
Q

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

A
  • longer
  • longer
63
Q

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

A
  • greater
  • wider
64
Q

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

A
  • mesial
  • convex
65
Q

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

A

shallow depression

66
Q

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

A

mesial marginal ridge

67
Q

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

A

trapezoidal

68
Q

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

A

deeper, which is opposite of the 1st premolar

69
Q

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

A

rounded-oval

70
Q

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

A
  • shorter
  • out
  • this gives a wrinkled appearance
71
Q

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

A
  • buccolingual aspect
  • buccal pulp horn
72
Q

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

A

below

73
Q

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

A

occlusal to apical

74
Q

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

A

kidney

75
Q

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

A

one

76
Q

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

A

buccolingual

77
Q

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

A

mesiodistally

Dental Anatomy (11 decks)

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