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Morphology > Incisors > Flashcards

Incisors Flashcards

1
Q

in maxillary arch

A

8 and 9

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2
Q

succedaneous or non succedaneous teeth?

A

succedaneous

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3
Q

when do they erupt?

A

7-8 years

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4
Q

facial outline of the crown =

A

trapezoidal

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5
Q

facially the max central incisor size:

A

longer than it is wide

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6
Q

mesial outline of max central incisor is

A

relatively straight/slightly convex

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7
Q

height of convexity of mesial surface of max central incisor is where

A

at incisal 1/3

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8
Q

contacts of central maxillary incisor

A

mesial: middle of incisal 1/3
distal: at the line of incisal and middle 1/3

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9
Q

the mesioincisal angle of max central incisor=

A

right angle

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10
Q

the disoincisal angle of max central incisor=

A

more rounded

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11
Q

CEJ of max central incisor=

A

curves apically

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12
Q

Labial developmental depressions and ridges of max central incisor

A

are slightly elevated areas on labial surface

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13
Q

root of max central incisor

A

only one, longer than the crown, has a blunt apex

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14
Q

what was does the apex of root for max central incisor

A

it is slightly distal to the long axis of the tooth

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15
Q

max central incisor lingual fossa

A

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

Sometimes have lingual pit

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16
Q

how is the max central incisor lingual aspect CEJ curved

A

curved convex towards the root

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17
Q

facial, incisal and lingual shape on the max central incisor mesial aspect

A

triangular,
facial-outline is slightly curved
incisally- flat, edge lies on the line, and slopes towards the lingual
lingual- outline is concavo-convex

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18
Q

CEJ on max central incisor

A

has the greatest curvature of any tooth in the mouth. It convexs incisally

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19
Q

max central incisor distal aspect

A

similar to mesial EXCEPT crown is thicker in incisal 1/3 and CEJ curvature is less

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20
Q

facial, incisal and lingual on max central incisor incisal aspect

A

triangular in shape
wider facially than lingually
facial is broad and flat
lingual is narrower and curved

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21
Q

apex of cingulum on max central incisor

A

slightly distal to the center of the tooth

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22
Q

max central incisor MF and DF line angles comparison

A

DF: is more rounded than MF line angle

MF and DF are more prominent than ML and DL line angles

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23
Q

General characteristics of max central incisor

A

Crown: longer than wide
Root: longer than crown
Crown: wider MD than FL

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24
Q

How many developmental lobes does max central incisor have

A

4: mesial, distal, lingual and labial lobe.
Mesial- marginal ridges and mesial part of labial surface
Distal- distal marginal ridge and part of labial surface
Labial- slightly prominent ridge
Lingual-cingulum

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25
Q

max central incisor mamelons

A

are the terminations of the 3 labial lobes, disappear over time

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26
Q

max central incisor pulp

A

single canal, facially can see 3 pulp horns

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27
Q

cross section view of max central incisor pulp

A

triangular, has mesial wall longer than distal

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28
Q

max lateral incisor #

A

7 and 10

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29
Q

max lateral incisor eruption

A

8-9 years of age

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30
Q

which tooth varies in form more than others

A

max lateral incisor, exception is the 3rd molars since some don’t even have them

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31
Q

which tooth is the most congenitally absent anterior tooth?

A

max lateral incisor

32
Q

general characteristics of max lateral incisor

A

similar in shape to maxillary central incisor but

  1. are smaller in dimensions BUT the roots.
  2. angels more rounded
  3. more pronounced lingual surface with a deeper lingual fossa
33
Q

mesial height of contour of max lateral incisor

A

at the line of middle and incisal 1/3s

34
Q

distal height of contour of max lateral incisor

A

in the middle of the middle 1/3

35
Q

MI and DI angles of max lateral incisor

A

DI angle is more rounded than MI but both are more rounded than central max incisor

36
Q

root of max lateral incisor

A

as long as the central incisor and slightly distal

37
Q

labial surface of max lateral incisor

A

is more convex than the central incisor

38
Q

lingual surface of max lateral incisor

A

lingual fossa often with a lingual pit, deeper than the central max incisor, pronounced cingulum

39
Q

incisal, lingual and labial on mesial surface of max lateral incisor

A

triangular in outline
labial-slightly convex
lingual- concavo-convex
incisal- angled lingually

40
Q

height of contour on facial and lingual surfaces of max lateral incisor

A

in the cervical 1/3

41
Q

distal aspect of max lateral incisor

A

triangular, appears wider than mesial view
it is curved lingually to match arch shape
CEJ curvature less than mesial
MAY have developmental groove on crown extending down the root

42
Q

incisal aspect of max lateral incisor

A

shape more oval
DL and ML both rounded than central, but DL more rounded than ML
contacts are centered labiolingually

43
Q

cingulum of max lateral incisor

A

slightly distal to the center of tooth

44
Q

max lateral incisor pulp

A

single canal, has 2 pulp horns

45
Q

max lateral incisor pulp cross section

A

may be triangular, round or ovoid

46
Q

mand central incisor #s

A

24 and 25

47
Q

mand lateral incisor #s

A

23 and 26

48
Q

general characteristics of mand central incisor

A

the smallest tooth, central mand is smaller than the lateral mand
(reverse of the maxillary arch)

49
Q

BL and MD of mand central incisor

A

broader buccolingually (BL) than mesiodistally (MD)

50
Q

mand central incisor facial view

A

shape trapezoidal
incisal outline is straight
2x longer (IG) than wide (MD)

51
Q

MI and DI angels of mand central incisor

A

they are both right angles

52
Q

what is the smallest tooth of the mouth

A

mand central incisor

53
Q

what is the only symmetrical tooth in the mouth?

A

mand central incisor

54
Q

facial view of mand central incisor

A

contacts are on the same level in the incisal 1/3

but distal contact is more cervically than mesial but still in the incisal 1/3

55
Q

mand central incisor crown and root relation

A

crown is shorter than the root

56
Q

root of mand central incisor

A

single root, curves distally in some cases

may. have some developmental depression along length

57
Q

mand central incisor lingual view

A

shape trapezoidal

no distinct lingual fossa, NO developmental grooves

58
Q

cingulum of mand central incisor

A

less distinct than the maxillary incisors

59
Q

labial, incisal and lingual on mesial view of mand central incisor

A

triangular in shape
labial-curved (convex)
incisal edge- lies lingual to line bisecting the tooth
CEJ curves more than distal

60
Q

height of contour of the labial surface of mand central incisor

A

cervical 1/3

61
Q

worn mand central incisor incisal edges angles

A

will be facial, since against maxillary incisor

62
Q

cervical line of mand central incisor

A

it is 1mm more apically on the lingual than the labial

63
Q

mand central incisor distal view

A

cervical lines curves incisally 1mm less than on the mesial

developmental depression on distal of root is greater than on the mesial

64
Q

mand central incisor incisal view

A

mesial half and distal half are almost identical

incisal edge is more ligual from the center of the tooth

65
Q

MD widths of mand central incisor

A

MD width of the labial surface is wider than the MD of the lingual surface

66
Q

pulp of mand central incisor

A

one pulp canal (40% of time have 2 canals)

broader FL than MD
developmental depressions that go down the root mesial and distal are seen on pulp cross-section

67
Q

mand central incisor developmental depression

A

goes along the mesial and distal sides of the root and pulp

distal is deeper than mesial

68
Q

mand lateral incisor general characteristics

A

larger than the central incisor

not as symmetrical as the central incisor

69
Q

mand lateral incisor crown height

A

distal crown height is shorter than the mesial height

incisal edge slopes downward

70
Q

angles of mand lateral incisor

A

mesioincisial angle is sharp right angle, distoincisal angle is rounded

71
Q

mand lateral incisor facial view

A

Lateral is wider MD than central.. the extra width appears to be added to the distal side than mesial

72
Q

mand lateral incisor contacts

A

are in the incisal 1/3, the distal contact is more cervical than mesial

73
Q

mand lateral incisor lateral incisor

A

same as the lingual surface of mand central incisor

74
Q

mand lateral incisor distal view

A

pretty similar to the mesial view only difference is that distal aspect is twisted lingually.

you cannot see lingual surface from the distal view

distal developmental depression is more marked than the mesial

75
Q

incisal view on mand lateral incisor

A

incisal edge is lingual to the center of the tooth

tooth is NOT symmetrical because it curves

DF line angle is more lingual

76
Q

mand lateral incisor root

A

root is ovoid/round
similar to central incisor but slightly larger
depression on the distal is deeper than in central

77
Q

mand lateral incisor pulp

A

one pulp canal (40% of the time)

Morphology (5 decks)

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