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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
describe the facial outline from the mesial aspect of the maxillary central incisor
slightly curved, flat incisally
26
do maxillary central incisors have lingual pits
occasionally
27
describe the mesial aspect of the maxillary central incisor
triangular or wedge shaped
28
where do the crown and root taper in the maxillary central incisor
lingual
29
describe the lingual outline from the mesial aspect of the maxillary central incisor
concavo-convex
30
where does incisal surface of the maxillary central incisor slope towards
lingual, but lies on the bisecting line
31
describe the mesial cervical line of the maxillary central incisor
has the greatest amount of curvature of any tooth in the mouth, line is curved toward the incisal
32
what is the difference between the distal aspect and mesial aspect of the maxillary central incisor
the crown looks thicker in incisal third from the distal aspect and the CEJ is not curved as much in the distal aspect
33
describe the incisal aspect of the maxillary central incisor
triangular in shape, mesial side is longer than distal side of triangle
34
describe the differences of the facial surface and ligual surface from the incisal aspect of the maxillary central incisor
-tooth is wider facially than lingually - facial surface is broad and flat - lingual surface is narrower and curved
35
where does the incisal edge of the maxillary central incisor lie in relation to the bisecting line
it lies on the line
36
where is the point of convexity of the cingulum from the incisal aspect of the maxillary central incisor
distal to the center of the lingual surface
37
where are the mesial and distal contact points of the maxillary central incisor
centered on the proximal surfaces labiolingually
38
what is a proximal surface
the surface of a tooth that adjoins the surface of another tooth in the same arch
39
which side of the maxillary central incisor is longer from the incisal aspect
the mesial edge
40
where are developmental depressions and ridges seen on the maxillary central incisor
facial and lingual
41
which part of the maxillary central incisor is longer: root or crown
root
42
what develops from the mesial lobe of the maxillary central incisor
mesial marginal ridge and mesial part of labial surface
43
what develops from the distal lobe of the maxillary central incisor
distal marginal ridge and distal part of labial surface
44
what develops from the labial lobe of the maxillary central incisor
slightly prominent ridge
45
what develops from the lingual lobe of the maxillary central incisor
the cingulum
46
what do mesiofacial and distofacial developmental depressions mark of the maxillary central incisor
junction of lobes
47
how many canals are there in the maxillary central incisor
one
48
what can you make of the pulp from the facial view of the maxillary central incisor
pulp chamber with three pulp horns
49
what does the pulp look like from a cross sectional view of the maxillary central incisor
trianglular, mesial wall is longer than the distal
50
at what age do maxillary lateral incisors erupt
8-9 years of age
51
what tooth varies in form the most
the maxillary later incisor
52
what anterior tooth is most frequently congenitally absent
the maxillary lateral incisor
53
how does the maxillary lateral incisor differ from the maxillary central incisor
- smaller in dimensions except root length - more rounded -more pronounced mesial and distal marginal ridges - lingual fossa is deeper
54
where is the mesial height of contour from the facial aspect of the maxillary lateral incisor
at the junction of the middle and incisal 1/3
55
describe the mesioincisal angle of the maxillary lateral incisors
slightly rounded
56
describe the incisal edge of the maxillary lateral incisor
outline is more rounded than central incisor
57
describe the shape of the lateral incisor from the facial aspect
trapezoidal
58
where is the distal height of contour from the facial aspect of the maxillary lateral incisor
middle 1/3
59
describe the root of the maxillary lateral incisor
pointed, as long or longer than the central incisor and tapers distally
60
describe the lingual aspect of the maxillary lateral incisor
-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
describe the mesial aspect of the maxillary lateral incisor
-triangular in shape - labial outline is slightly convex - lingual outline is concavo-convex
62
where is the height of contour of the mesial aspect of the maxillary lateral incisor
on the facial and lingual surfaces it is on the cervical third
63
which way is the incisal surface angled of the maxillary lateral incisor
lingually
64
describe the shape of the root from the mesial aspect of the maxillary lateral incisor
cone shaped and tapers apically
65
where does the incisal edge lie in relation to the bisecting line of the lateral maxillary incisor from the mesial view
center of the incisal surface
66
describe the distal aspect of the maxillary lateral incisor
appears wider than the mesial view -triangular in outline
67
where is the crest of the cingulum of the maxillary lateral incisor located from the incisal aspect
slightly to the distal of center of the tooth
68
where is the crest of the cingulum of the lateral incisor from the incisal aspect
slightly distal to the center of the tooth
69
describe the distolingual line angle compared to the mesiolingual line angle from the incisal aspect on the maxillary lateral incisor
the DL line angle is more rounded than the ML line angle
70
describe the pulp of the maxillary lateral incisor
single canal, 2 pulp horns
71
describe the cervical line curvature on the mesial and distal aspect of the lateral maxillary incisor
mesial is greater curvature than the distal

Dental Morphology (12 decks)

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