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Dental Morph (all material) > Lecture 3- Permanent Maxillary Incisors > Flashcards

Lecture 3- Permanent Maxillary Incisors Flashcards

1
Q

general characteristics of maxillary central incisors

A

-member of the incisor classification of teeth
-used to cut or incise food
-shovel shaped
-2 in the maxillary arch (#8 &9)
-succedaneous teeth
-erupt @ 7-8 years of age

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2
Q

what shape is the crown of maxillary central incisors from the facial aspect?

A

trapezoidal

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3
Q

anatomical crown of maxillary central incisors is _____ than it is _____

A

longer; wide

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4
Q

how long is the maxillary central incisors crown

A

10-11 mm

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5
Q

how wide is the maxillary central incisors crown

A

8-9 mm

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6
Q

mesiodistal dimension at the CEJ of maxillary central incisors is…

A

6-7 mm

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7
Q

mesial outline of the maxillary central incisors is…

A

relatively straight; only slightly convex

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8
Q

height of convexity/contour

A

point of greatest convexity on a tooth surface

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9
Q

where is the height of convexity of mesial surface of maxillary central incisors located?

A

incisal 1/3 of the tooth

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10
Q

where is the mesial contact area of the maxillary central incisors located?

A

incisal 1/3 of the tooth

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11
Q

contact area

A

where the tooth touches another tooth- occurs at the mesial/distal height of contour

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12
Q

which outline is more convex for the maxillary central incisors?

A

distal outline

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13
Q

where is the height of contour on the distal surface of maxillary central incisors located?

A

at the junction of the middle and incisal 1/3’s

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14
Q

where is the distal contact area of the maxillary central incisors located?

A

junction of the middle and incisal 1/3’s

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15
Q

incisal outline of maxillary central incisors is _______

A

straight

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16
Q

mesioincisal angle of maxillary central incisors is….

A

a right angle

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17
Q

distoincisal angle of maxillary central incisors is…

A

more rounded than the mesioincisal angle

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18
Q

line angle

A

junction of TWO tooth surfaces

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19
Q

point angle

A

junction of THREE tooth surfaces

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20
Q

presentation of CEJ in maxillary central incisors

A

CEJ is curved toward the root apex (apically)

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21
Q

does the facial aspect of maxillary central incisors contain labial developmental depressions and ridges?

A

yes

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22
Q

root of maxillary central incisors

A

-single root
-cone shaped with a blunt apex
-apex of the root is slightly to the distal of the long axis of the tooth

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23
Q

length of root of maxillary central incisors

A

13 mm

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24
Q

long axis

A

a line extending through the center of an object lengthwise

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25
Q

ridges of maxillary central incisors on lingual aspect

A

mesial and distal marginal ridges

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26
Q

lingual fossa of maxillary central incisors

A

bounded by the incisal edge, mesial and distal marginal ridges & the cingulum

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27
Q

crown and root of maxillary central incisors taper to…

A

lingual
*part of the mesial and distal aspects of the tooth can be seen from the lingual aspect

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28
Q

mesial aspect of maxillary central incisors shaped like….

A

triangle or wedge

29
Q

facial outline of mesial aspect of maxillary central incisors is…

A

slightly curved, flat incisally

30
Q

lingual outline of mesial aspect of maxillary central incisors is…

A

concavo-convex

31
Q

incisal edge of mesial apect of maxillary central incisors lies ___ to the dissecting line

A

lies on the dissecting line

32
Q

incisal surface of the mesial aspect of maxillary central incisors slopes towards…

A

the lingual

33
Q

what is special about the mesial cervical line of maxillary central incisors?

A

has the greatest amount of curvature of any tooth in the mouth
*curved toward the incisal

34
Q

differences between mesial and distal apects of maxillary central incisors

A

-distal aspect crown looks thicker in incisal 1/3
-curvature of cervical line of distal aspect is less than the mesial

35
Q

incisal aspect of maxillary central incisors is shaped like?

A

triangle

36
Q

from the incisal aspect of the maxillary central incisors, is the tooth wider facially or lingually?q

A

facially

37
Q

from the incisal aspect of the maxillary central incisors, what does the facial surface look like?

A

broad and flat

38
Q

from the incisal aspect of the maxillary central incisors, what does the lingual surface look like?

A

narrow and curved

39
Q

what does the incisal edge of the maxillary central incisors bisect?

A

the faciolingual diameter

40
Q

where is the point of convexity of the cingulum from the incisal aspect of maxillary central incisors located?

A

distal to the center of the lingual surface

41
Q

where are the mesial and distal contact points from the incisal aspect of maxillary central incisors located?

A

centered on the proximal surfaces labiolingually

42
Q

which line angles of the maxillary central incisors are more prominent?
-MF and DF line angles
-ML and DL line angles

A

MF and DF line angles are more prominent

43
Q

which line angle of the maxillary central incisors is more obtuse/round?
-MF line angle
-DF line angle

A

DF line angle is more obtuse/round

44
Q

are there developmental depressions and ridges on the labial surface of maxillary central incisors?

A

yes

45
Q

labiolingual width of maxillary central incisors

A

7mm

46
Q

is the crown of maxillary central incisors wider mesiodistally or faciolingually?

A

mesiodistally

47
Q

how many lobes do the maxillary central incisors develop from?

A

4

48
Q

mesial lobe of maxillary central incisors

A

mesial marginal ridge and mesial part of labial surface

49
Q

distal lobe of maxillary central incisors

A

distal marginal ridge and distal part of labial surface

50
Q

labial lobe of maxillary central incisors

A

slightly prominent ridge

51
Q

lingual lobe of maxillary central incisors

A

forms the cingulum

52
Q

what marks of the junction of lobes between the facial lobes of maxillary central incisors?

A

mesiofacial and distofacial developmental depressions

53
Q

how many pulp canals do maxillary central incisors have?

A

one singular canal

54
Q

facial view of pulp canal in maxillary central incisors

A

-pulp chamber with three pulp horns
-pulp horns disappear as patient ages

55
Q

cross sectional view of pulp canal in maxillary central incisors

A

-triangular in view
-mesial, distal, and facial wall
-mesial wall is longer than the distal

56
Q

general characteristics of maxillary lateral incisors

A

-#7 and 10
-teeth are second from midline in each quadrant
-erupt 8-9 years of age
-supplement the central incisor in function

57
Q

which tooth varies in form more than any other tooth in the mouth?

A

the maxillary lateral incisor
*exception: third molars

58
Q

which anterior tooth is most frequently congenitally absent?

A

the maxillary lateral incisor
*third molars are the more frequently congenitally absent tooth

59
Q

differences in maxillary lateral incisors compared to maxillary central incisors

A

-smaller in all dimensions EXCEPT root length
-more rounded
-more pronounced mesial and distal marginal ridges (lingual surface)
-lingual fossa is deeper

60
Q

facial aspect of maxillary lateral incisors are shaped like?

A

trapezoid

61
Q

where is the mesial height of contour of maxillary lateral incisors located?

A

junction of the middle and incisor 1/3s

62
Q

where is the distal height of contour of maxillary lateral incisors located?

A

middle 1/3

63
Q

labial surface of maxillary lateral incisors is more ___ than the central?

A

convex

64
Q

root of maxillary lateral incisors

A

-pointed
-as long, or longer than central maxillary incisor
-usually tapers distally

65
Q

lingual aspect of maxillary lateral incisors is shaped like?

A

trapezoid

66
Q

lingual fossa of maxillary lateral incisors is ____ than central

A

deeper
*often with a lingual pit

67
Q

grooves of lingual aspect of maxillary lateral incisors

A

deep developmental grooves
-lingual developmental groove on distal of cingulum

68
Q

where is the greatest curvature on the facial and lingual surfaces of mesial aspect of maxillary lateral incisors located?

A

in the cervical 1/3
*same as central incisor

69
Q
A

Dental Morph (all material) (10 decks)

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