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Dental Morphology > Lecture 3 Maxillary Incisors > Flashcards

Lecture 3 Maxillary Incisors Flashcards

1
Q

describe the shape of the facial aspect of the maxillary central incisor

A

trapezoid

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2
Q

when do maxillary central incisors erupt

A

7-8 years of age

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3
Q

how long is the crown of a maxillary central incisor

A

10-11 mm at the highest point on CEJ incisal edge

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4
Q

how wide is the crown of a maxillary central incisor

A

8-9 mm wide at the contact areas

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5
Q

describe the mesial outline of the central incisor from the facial aspect

A

relatively straight or slightly convex

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6
Q

where is the height of convexity of the mesial surface of the maxillary central incisor

A

incisal 1/3

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7
Q

which side of the maxillary central incisor is more convex

A

distal

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8
Q

where is the mesial contact area of the maxillary central incisor

A

incisal 1/3 of the tooth

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9
Q

where is the height of contour on the distal edge of the maxillary central incisor

A

junction of the middle and incisal third

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10
Q

describe the incisal outline of this maxillary central incisor

A

straight

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11
Q

what are mamelons of the maxillary central incisor

A

3 rounded protuberances found on the incisal edge of newly erupted incisors

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12
Q

describe the mesioincisal edge of the maxillary central incisor

A

right angle

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13
Q

describe the distoincisal edge of the maxillary central incisor

A

more rounded than mesioincisal

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14
Q

where is the height of contour on the distal of the maxillary central incisor

A

junction of the middle and incisal 1/3’s

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15
Q

what is a line angle

A

the junction of two tooth surfaces

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16
Q

what is a point angle

A

the junction of three tooth surfaces

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17
Q

how is the CEJ of the maxillary central incisor shaped

A

it is curved towards the apex

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18
Q

how many roots does this the maxillary central incisor have

A

one

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19
Q

describe the root of the maxillary central incisor

A

cone shaped with a blunt apex. apex is slightly to the distal of the long axis of the tooth

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20
Q

how long is the root of the maxillary central incisor

A

13 mm

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21
Q

what is a ridge

A

a linear elevation on the surface of a tooth and is named according to location

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22
Q

what is the lingual fossa of the maxillary central incisor bound by

A

the incisal edge, mesial and distal marginal ridges and the cingulum

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23
Q

what is a cingulum

A

bublous convexity on the cervical third of the lingual surface on an anterior tooth

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24
Q

what is a pit

A

a small pinpoint depression in the depths of developmental processes

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25
Q

describe the facial outline from the mesial aspect of the maxillary central incisor

A

slightly curved, flat incisally

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26
Q

do maxillary central incisors have lingual pits

A

occasionally

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27
Q

describe the mesial aspect of the maxillary central incisor

A

triangular or wedge shaped

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28
Q

where do the crown and root taper in the maxillary central incisor

A

lingual

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29
Q

describe the lingual outline from the mesial aspect of the maxillary central incisor

A

concavo-convex

30
Q

where does incisal surface of the maxillary central incisor slope towards

A

lingual, but lies on the bisecting line

31
Q

describe the mesial cervical line of the maxillary central incisor

A

has the greatest amount of curvature of any tooth in the mouth, line is curved toward the incisal

32
Q

what is the difference between the distal aspect and mesial aspect of the maxillary central incisor

A

the crown looks thicker in incisal third from the distal aspect and the CEJ is not curved as much in the distal aspect

33
Q

describe the incisal aspect of the maxillary central incisor

A

triangular in shape, mesial side is longer than distal side of triangle

34
Q

describe the differences of the facial surface and ligual surface from the incisal aspect of the maxillary central incisor

A

-tooth is wider facially than lingually
- facial surface is broad and flat
- lingual surface is narrower and curved

35
Q

where does the incisal edge of the maxillary central incisor lie in relation to the bisecting line

A

it lies on the line

36
Q

where is the point of convexity of the cingulum from the incisal aspect of the maxillary central incisor

A

distal to the center of the lingual surface

37
Q

where are the mesial and distal contact points of the maxillary central incisor

A

centered on the proximal surfaces labiolingually

38
Q

what is a proximal surface

A

the surface of a tooth that adjoins the surface of another tooth in the same arch

39
Q

which side of the maxillary central incisor is longer from the incisal aspect

A

the mesial edge

40
Q

where are developmental depressions and ridges seen on the maxillary central incisor

A

facial and lingual

41
Q

which part of the maxillary central incisor is longer: root or crown

42
Q

what develops from the mesial lobe of the maxillary central incisor

A

mesial marginal ridge and mesial part of labial surface

43
Q

what develops from the distal lobe of the maxillary central incisor

A

distal marginal ridge and distal part of labial surface

44
Q

what develops from the labial lobe of the maxillary central incisor

A

slightly prominent ridge

45
Q

what develops from the lingual lobe of the maxillary central incisor

A

the cingulum

46
Q

what do mesiofacial and distofacial developmental depressions mark of the maxillary central incisor

A

junction of lobes

47
Q

how many canals are there in the maxillary central incisor

48
Q

what can you make of the pulp from the facial view of the maxillary central incisor

A

pulp chamber with three pulp horns

49
Q

what does the pulp look like from a cross sectional view of the maxillary central incisor

A

trianglular, mesial wall is longer than the distal

50
Q

at what age do maxillary lateral incisors erupt

A

8-9 years of age

51
Q

what tooth varies in form the most

A

the maxillary later incisor

52
Q

what anterior tooth is most frequently congenitally absent

A

the maxillary lateral incisor

53
Q

how does the maxillary lateral incisor differ from the maxillary central incisor

A
  • smaller in dimensions except root length
  • more rounded
    -more pronounced mesial and distal marginal ridges
  • lingual fossa is deeper
54
Q

where is the mesial height of contour from the facial aspect of the maxillary lateral incisor

A

at the junction of the middle and incisal 1/3

55
Q

describe the mesioincisal angle of the maxillary lateral incisors

A

slightly rounded

56
Q

describe the incisal edge of the maxillary lateral incisor

A

outline is more rounded than central incisor

57
Q

describe the shape of the lateral incisor from the facial aspect

A

trapezoidal

58
Q

where is the distal height of contour from the facial aspect of the maxillary lateral incisor

A

middle 1/3

59
Q

describe the root of the maxillary lateral incisor

A

pointed, as long or longer than the central incisor and tapers distally

60
Q

describe the lingual aspect of the maxillary lateral incisor

A

-trapezoidal in shape
- lingual fossa is deeper than central incisors, often with a lingual pit, prominent mesial and distal ridges
- pronounced cingulum
- deep developmental grooves
- tooth tapers to lingual

61
Q

describe the mesial aspect of the maxillary lateral incisor

A

-triangular in shape
- labial outline is slightly convex
- lingual outline is concavo-convex

62
Q

where is the height of contour of the mesial aspect of the maxillary lateral incisor

A

on the facial and lingual surfaces it is on the cervical third

63
Q

which way is the incisal surface angled of the maxillary lateral incisor

64
Q

describe the shape of the root from the mesial aspect of the maxillary lateral incisor

A

cone shaped and tapers apically

65
Q

where does the incisal edge lie in relation to the bisecting line of the lateral maxillary incisor from the mesial view

A

center of the incisal surface

66
Q

describe the distal aspect of the maxillary lateral incisor

A

appears wider than the mesial view
-triangular in outline

67
Q

where is the crest of the cingulum of the maxillary lateral incisor located from the incisal aspect

A

slightly to the distal of center of the tooth

68
Q

where is the crest of the cingulum of the lateral incisor from the incisal aspect

A

slightly distal to the center of the tooth

69
Q

describe the distolingual line angle compared to the mesiolingual line angle from the incisal aspect on the maxillary lateral incisor

A

the DL line angle is more rounded than the ML line angle

70
Q

describe the pulp of the maxillary lateral incisor

A

single canal, 2 pulp horns

71
Q

describe the cervical line curvature on the mesial and distal aspect of the lateral maxillary incisor

A

mesial is greater curvature than the distal

Dental Morphology (12 decks)

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