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Dental Anatomy > Permanent Maxillary Incisors > Flashcards

Permanent Maxillary Incisors Flashcards

1
Q

the major function of maxillary incisors is to ___ and ___ food

A

cut and punch

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2
Q

do maxillary incisors have cusps?

A

no, just incisal ridges/edges

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3
Q

describe the incisal edge of maxillary incisors

A
  • starts out as incisal ridge
  • edge is formed after wear has occurred
  • edge is flattened linguoincisally
  • edge is found at the junction with the labial surface
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4
Q

how does the mesiodistal width of the maxillary central incisor compare to all other anterior teeth?

A

it is the widest

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5
Q

the maxillary central incisor’s labial surface is less ___ than the maxillary lateral or canine

A

convex

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6
Q

the maxillary central incisor has a ___ or ___ shaped appearance

A

rectangualr or squared

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7
Q

the maxillary central incisor’s mesial incisal angle is fairly ___, while the distal angle is fairly ___

A
  • sharp
  • rounded
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8
Q

where are mamelons found?

A
  • on the incisal ridge of permanent incisors
  • they are normally worn down to form an incisal edge
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9
Q

some maxillary central incisors will be fairly flat in ___ and ___ thirds

A

middle and incisal

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10
Q

from the lingual aspect, the maxillary central incisor is more ___ in appearance

A

irregular

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11
Q

from the lingual aspect, the maxillary central incisor’s largest part is ___

A

concave

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12
Q

from the lingual aspect, the maxillary central incisor has ___ and ___ marginal ridges

A

mesial and distal

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13
Q

from the lingual aspect, the maxillary central incisor has a ___-like look

A

scoop

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14
Q

from the labial aspect, the maxillary central incisor’s average length is ___mm from high point on cervix to incisal edge

A

10-11mm

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15
Q

from the labial aspect, the maxillary central incisor’s mesiodistal length is about ___mm from contact to contact

A

8-9mm

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16
Q

from the labial aspect, the maxillary central incisor’s mesial outline shows a slight ___, with the crest of curvature near the ____

A
  • convexity
  • mesioincisal angle
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17
Q

from the labial aspect, the maxillary central incisor’s distal outline is more ___, with the crest of curvature ___ toward ___

A
  • convex
  • higher
  • cervical line
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18
Q

from the labial aspect, the maxillary central incisor’s incisal outline curves very slightly ___ towards the ___

A
  • downward
  • center
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19
Q

the maxillary central incisor’s root is ___ shaped

A

cone

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20
Q

the apex of the root of the maxillary central incisor is ___

A

blunt

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21
Q

the root of the maxillary central incisor is usually 2-3mm ___ than the crown

A

longer

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22
Q

the bisecting line of the root of the maxillary central incisor is through the ___, and the crown tends to parallel the ___

A
  • root
  • mesial
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23
Q

T or F:

from the lingual aspect, the maxillary central incisor is a reverse of the labial outline

A

true

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24
Q

from the lingual aspect, the maxillary central incisor has ___ and a definite concavity

A

convexities

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25
Q

from the lingual aspect, the maxillary central incisor has a ___ below the cervical line

A

cingulum

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26
Q

from the lingual aspect, the maxillary central incisor’s cingulum is confluent with the ___ and ___

A

mesial and distal marginal ridges

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27
Q

from the lingual aspect, the maxillary central incisor has a ___ just below the cingulum

A

lingual fossa

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28
Q

from the lingual aspect, the maxillary central incisor’s borders are the ___, ___, and ___

A
  • incisal ridge
  • marginal ridges
  • cingulum
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29
Q

from the lingual aspect, the maxillary central incisor may have developmental grooves from the ___ to the ___

A

cingulum to the fossa

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30
Q

from the lingual aspect, the maxillary central incisor’s crown and root taper ___, so the ___ portion is narrower

A
  • lingually
  • lingual
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31
Q

from the mesial aspect, the maxillary central incisor is ___ shaped with the base at the ___

A
  • triangular
  • cervix
32
Q

from the lingual aspect, the maxillary central incisor’s bisecting line will go through the ___ and ___

A

apex and incisal ridge

33
Q

from the lingual aspect, the maxillary central incisor’s crests of curvature are just below the ___

A

cervical lines

34
Q

from the lingual aspect of the maxillary central incisor, a line lingual to the ___ is rarely seen

A

incisal ridge

35
Q

from the lingual aspect, the maxillary central incisor will have a ___ just below the cingulum

A

concavity

36
Q

from the lingual aspect, the maxillary central incisor’s curvature of the cervical line is ___ on the mesial surface than the distal

A

greater

37
Q

from the distal aspect of the maxillary central incisor, more of the ___ surface is seen due to a slight curvature of the ___ surface

A
  • labial
  • labial
38
Q

from the distal aspect, the maxillary central incisor’s labial curvature helps adapt to the curvature of the ___

A

dental arch

39
Q

from the distal aspect of the maxillary central incisor, the curvature of the cervical line is ___ than on the mesial

A

less

40
Q

from the incisal aspect of the maxillary central incisor, the cervical portion of the labial surface is a broad ___

A

convexity

41
Q

from the incisal aspect, the maxillary central incisor’s incisal ridge is ___

A

clear

42
Q

from the incisal aspect, the maxillary central incisor’s edge generally slopes to the ___

A

lingual

43
Q

from the incisal aspect, the maxillary central incisor’s outline of the lingual portion tapers ___ toward the ___

A
  • lingually
  • cingulum
44
Q

from the incisal aspect, the maxillary central incisor’s mesiolabial and distolabial line angles are ___ and ___ than the lingual

A

prominent and wider

45
Q

from the incisal aspect of the maxillary central incisor, more ___ is seen from this view

A

bulk

46
Q

from the incisal aspect, the maxillary central incisor’s labiolingual measurement is only ___ as great as the mesiodistal

A

2/3

47
Q

from the incisal aspect, the maxillary central incisor’s crown has a ___ shape

A

triangular

48
Q

from the labiolingual section of the maxillary central incisor pulp chamber, it is narrow in ___, widest in ___, and tapers gradually to apex

A
  • incisal
  • cervical
49
Q

from the mesiodistal section of the maxillary central incisor pulp chamber, it is ___ than labiolingual and conforms to the general shape of the ___, with ___ in younger teeth that taper evenly to apex

A
  • wider
  • outer surface
  • pulp horns
50
Q

the maxillary central incisor pulp cavity is widest at the ___ area

A

cervical

51
Q

T or F:

the maxillary lateral incisor may vary more than any other tooth with the exception of the 1st molar

A

false:

with the exception of the 3rd molar

52
Q

describe 4 ways in which the maxillary lateral incisors will vary from other teeth

A
  • peg shaped laterals are sometimes seen
  • may be missing
  • may have a palato-radicular groove
  • may see a large pointed tubercle
53
Q

from the labial aspect, the maxillary lateral incisor has ___ curvature than the central, with a ___ incisal ridge

A
  • more
  • rounded
54
Q

from the labial aspect, the maxillary lateral incisor’s mesial outline resembles a central with more ___ at the angle

A

roundness

55
Q

from the labial aspect, the maxillary lateral incisor’s mesial crest of contour is at the junction of the ___ and ___ thirds

A

middle and incisal

56
Q

from the labial aspect, the maxillary lateral incisor’s distal outline is always ___ rounded

A

more

57
Q

from the labial aspect, the maxillary lateral incisor’s crest of contour on the distal is at the center of the ___ third

A

middle

58
Q

from the labial aspect, the maxillary lateral incisor’s labial surface is usually more ___ than the central, except with some ___ ones

A
  • convex
  • flat
59
Q

from the labial aspect, the maxillary lateral incisor is usually about __mm narrower than the central

A

2mm

60
Q

from the labial aspect, the maxillary lateral incisor’s root length is ___ in proportion to the crown than the central. it is ___x the length of the crown

A
  • greater
  • 1.5x
61
Q

from the labial aspect, the maxillary lateral incisor’s root tapers to ___, curves to the ___, and ends in a sharper ___

A
  • apex
  • distal
  • apex
62
Q

from the lingual aspect, the maxillary lateral incisor’s mesial and distal marginal ridges are ___

A

marked

63
Q

from the lingual aspect, the maxillary lateral incisor’s cingulum is prominent, with ___

A

deep developmental grooves

64
Q

from the lingual aspect, the maxillary lateral incisor’s linguoincisal ridge is ___

A

well-developed

65
Q

from the lingual aspect, the maxillary lateral incisor’s lingual fossa is more ___

A

concave

66
Q

from the lingual aspect, the maxillary lateral incisor may have deep developmental groove at the side of the ___, mostly distal

A

cingulum

67
Q

from the mesial aspect, the maxillary lateral incisor resembles a small ___; the crown is ___ and the root is ___

A
  • central incisor
  • shorter
  • longer
68
Q

from the mesial aspect, the maxillary lateral incisor appears thicker than the central due to heavy development of the ___

A

incisal ridge

69
Q

from the distal aspect, the maxillary lateral incisor’s width of the crown appears ___ than the mesial

A

thicker

70
Q

from the distal aspect, the maxillary lateral incisor’s curvature of the cervical line is ___ than mesial

A

less

71
Q

from the distal aspect, the maxillary lateral incisor may have a ___ on the crown surface going onto the root

A

developmental groove

72
Q

from the incisal aspect, the maxillary lateral incisor may resemble the ___ or it may look like a ___

A
  • central
  • canine
73
Q

from the incisal aspect, the maxillary lateral incisor’s labiolingual dimension may be ___ than the mesiodistal dimension

A

greater

74
Q

is the pulp chamber anatomy of the maxillary lateral incisor similar to the central incisor?

A

yes, only smaller

75
Q

what are the dimensions of the maxillary central incisor?

CI length of crown
length of root
MD diameter of crown
MD diameter of crown @cervix
LL diameter of crown
LL diameber of crown @cervix
curvature or cervical line - M
curvature of cervical line - D

A

in mm

CI length of crown - 10.5
length of root - 13
MD diameter of crown - 8.5
MD diameter of crown @cervix - 7
LL diameter of crown - 7
LL diameber of crown @cervix - 6
curvature or cervical line - M - 3.5
curvature of cervical line - D - 2.5

76
Q

what are the dimensions of the maxillary lateral incisor?

CI length of crown
length of root
MD diameter of crown
MD diameter of crown @cervix
LL diameter of crown
LL diameber of crown @cervix
curvature or cervical line - M
curvature of cervical line - D

A

in mm

CI length of crown - 9.5
length of root - 12.5
MD diameter of crown - 5
MD diameter of crown @cervix - 3.5
LL diameter of crown - 6
LL diameber of crown @cervix - 5.3
curvature or cervical line - M - 3
curvature of cervical line - D - 2

Dental Anatomy (11 decks)

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