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Dental Morphology > Mandibular Incisors > Flashcards

Mandibular Incisors Flashcards

1
Q

Numbers assigned to mandibular central incisors

A

24, 25

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2
Q

Numbers of the Mandibular lateral incisors

A

23, 26

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3
Q

Where two adjacent teeth contact

A

Interproximal contact

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4
Q

Spaces/spillways that widen out from the contact

A

Embrasures

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5
Q

Anterior teeth have four embrasure spaces:

A

Incisal
Gingival (cervical)
Facial
Lingual

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6
Q

Which is larger in anterior teeth, the incisal or gingival embrasure:

A

Gingival

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7
Q

Which is larger in anterior teeth, the facial or lingual space:

A

They’re equal

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8
Q

Posterior teeth have four embrasure spaces:

A

Occlusal
Gingival (cervical)
Facial
Lingual

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9
Q

In posterior teeth, is the occlusal or gingival embrasure larger

A

Equal

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10
Q

Which is larger in posterior teeth, the facial or lingual embrasure

A

Lingual

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11
Q

Label the anterior embrasures

A

A- gingival (cervical)
B- incisal
C- facial
D- lingual

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12
Q

Label the posterior embrasures

A

A- occlusal
B- gingival (cervical)
C- facial
D- lingual

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13
Q

The Mandibular incisors are used to:

A

Cut/incise food

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14
Q

How many mandibular incisors are present:

A

4

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15
Q

Mandibular incisors have smaller ______ than any other tooth

A

Mesiodistal diameters

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16
Q

Mandibular central incisors are the:

A

Smallest tooth

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17
Q

In the mandibular arch, what is smaller- the central or lateral incisors

A

Central

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18
Q

Mandibular incisors are broader _____ than _____

A

Buccolingually (BL) than Mesiodistally (MD)

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19
Q

What is the outline of the mandibular central incisor

A

Trapexoisal

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20
Q

The mandibular central incisor tapers:

A

Cervically

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21
Q

Describe the incisal outline of the mandibular central incisor:

A

Straight

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22
Q

What is present on the mandibular central incisor when the tooth erupts

A

Mamelons

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23
Q

The crown is approximately two times as ____ as it is ____

A

Long IG as it is MD

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24
Q

From a facial view of a mandibular central incisor, the mesial and distal outlines are ______ and taper to the ____

A

Straight up to the contact areas & taper to the cervix

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25
Q

From a facial view of the mandibular central incisor, the mesioincisal & distoincisal line angles are:

A

Sharp 90 degree angles

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26
Q

The mandibular central incisor is often described as the:

A

Only symmetrical tooth in the mouth

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27
Q

From a facial view of the mandibular central incisor, the mesial & distal contact areas are in the:

A

Incisal 1/3

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28
Q

From a facial view of the mandibular central incisor, both contacts:

A

Are at the same level

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29
Q

In most teeth, the ____ contact is positioned more cervically than the _____ contact
(Even if its located in the same 1/3 or junction)

A

Distal
Mesial

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30
Q

From a facial view of the mandibular central incisor, describe the length of the crown relative to the root:

A

Crown is shorter than root

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31
Q

From a facial view of the mandibular central incisor, describe the labial surfaces:

A

Smooth, no developmental depressions

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32
Q

From a facial view of a mandibular central incisor, the labial surface is ____ in the ____ & becomes more ______

A

Flat in the incisal 1/3, more convex cervically

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33
Q

From a facial view of the mandibular central incisor, describe the # of roots

A

Single roto

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34
Q

From a facial view of a mandibular central incisor, describe the root:

A

Narrow MD & curves distally in some cases

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35
Q

From a lingual view of a mandibular central incisor, the crown is _____ in outline

A

Trapezoidal

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36
Q

From a lingual view of a mandibular central incisor, the crown root is smooth & rounded, slightly concave, but has no:

A

Distinct lingual fossa

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37
Q

From a lingual view of a mandibular central incisor, we can see ____ & only minor elevations

A

Mesial & distal marginal ridges

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38
Q

From a lingual view of a mandibular central incisor, describe the cingulum when compared to a maxillary incisor:

A

Much less distance than in the maxillary incisor

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39
Q

From a lingual view of a mandibular central incisor, is a developmental groove present?

A

No

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40
Q

From a mesial view of a mandibular central incisor:

The tooth is _____ in outline

A

Triangular

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41
Q

From a lingual view of a mandibular central incisor, the labial outline is:

A

Curved (convex)

42
Q

From a lingual view of a mandibular central incisor, the height of contour of the labial surface is in the:

A

Cervical 1/3

43
Q

From a mesial view of a mandibular central incisor, the incisal edge lies ______ to the line bisecting the root

A

Lingual

44
Q

From a mesial view of a mandibular central incisor, when worn, the incisal edge angles to the:

A

Facial

45
Q

Fron a mesial view of a mandibular central incisor, the CEJ curves ____ about 1 mm more than on the ____

A

Incisally
Distal

46
Q

In a mandibular central incisor, the CEJ curves incisally about 1mm more on the ___ than it does on the ___

A

Mesial than is does on the distal

47
Q

When the mandibular central incisor is worn, the incisal edge angles to the:

A

Facial

48
Q

From a mesial view of the mandibular central incisor, the cervical line extends 1mm more apically on the ____ than ____

A

Lingual
Labial

49
Q

When discussing the mandibular central incisor, the teeth are broader ____ than ____

A

Labiolingually than mesiodistally

50
Q

From a mesial view of the mandibular central incisor, the crown have a concavity below ______ & above the _____

A

Middle 1/3
Cervical line

51
Q

From a mesial view of the mandibular central incisor, the root extends straight from the CEJ & tapers _______ from the middle 1/3

A

Apically

52
Q

From a mesial view of the mandibular central incisor, the root may have a broad ____ along its length

A

Developmental depression

53
Q

From a distal view of the mandibular central incisor, compared to the mesial view, the cervical line curves incisally 1mm _____ than on the mesial

A

Less

54
Q

From a distal view of the mandibular central incisor, the developmental depression on the distal of the root is _____ than on the mesial

A

Greater

55
Q

From a incisal view of the mandibular central incisor, what is obvious about the tooth:

A

The symmetry

56
Q

From a incisal view of the mandibular central incisor, the incisal edge is at _____ to a line bisecting the crown ____

A

Right angles
Labiolingually

57
Q

From a incisal view of the mandibular central incisor, the incisal edge lies ____ to the center of the tooth

A

Lingual

58
Q

From a incisal view of the mandibular central incisor, the tooth coverges:

A

Lignually

59
Q

From a incisal view of the mandibular central incisor, the MD width of the _____ surface is wider than the MD width of the ____ surface

A

Labial
Lingual

60
Q

From a incisal view of the mandibular central incisor, contact areas are centered _____

A

Faciolingually

61
Q

Number of roots in a mandibular central incisor:

A

Single

62
Q

In a mandibular central incisor, the root is broader ____ than ___

A

FL than MD

63
Q

On the root of the mandibular central incisor, developmental depressions run longitudinally down root, on the ____ & ____

A

Mesial & distal

64
Q

On the mesial & distal sides of the root of the mandibular central incisors, what are present

A

developmental depressions

65
Q

On a mandibular central incisor the ___ depression on the root is usually deeper than the ____ depression on the root

A

Distal
Mesial

66
Q

A cross section of the mandibular central incisors root reveals what shape & contains:

A

Round or ovoid
Depression on the mesial & distal

67
Q

How pulp canals are present in the root of the mandibular central incisor:

A

Usually one

68
Q

Describe the pulp canal MD and FL of the mandibular central incisor:

A

MD= narrow
FL= broad

69
Q

Around 40% of the time in the mandibular central incisor, how many pulp canals are present?

A

Two

70
Q

If two pulp canals are present in a mandibular central incisor, what are the names?

A

Facial & lingual canals

71
Q

Label each view of the mandibular central incisor

A

Facial, lingual, incisal, mesial, distal

72
Q

The mandibular lateral incisor resembles what tooth:

A

Mandibular central incisor

73
Q

When compared to the mandibular central incisor, the mandibular lateral incisor is:

A

Larger

74
Q

How is the mandibular lateral incisor larger than the central incisor?

A

Wider MD

75
Q

Because the mandibular lateral incisor is wider MD than the mandibular central incisor, all the extra width appears to be added to the:

A

Distal aspect of tooth

76
Q

Label the type of teeth

A

Left- mandibular lateral incisor
Right- mandibular central incisor

77
Q

Label each view of the mandibular lateral incisor:

A

Facial, lingual, incisal, mesial, distal

78
Q

From a facial view of the mandibular lateral incisor, the distal crown height is often ____ compared to the mesial crown height

A

Shorter

79
Q

From a facial view of the mandibular lateral incisor, the incisal edge slopes:

A

Downward distally

80
Q

From a facial view of the mandibular lateral incisor, the mesioincisal angle is:

A

A sharp 90 degrees

81
Q

From a facial view of the mandibular lateral incisor, the distoincisal angle is:

A

Rounded

82
Q

From a facial view of the mandibular lateral incisor, the lateral is wider ____ compared to the central incisor

A

MD

83
Q

From a facial view of the mandibular lateral incisor, the mesial and distal contacts are in the:

A

Incisal 1/3

84
Q

From a facial view of the mandibular lateral incisor, although both mesial & distal contacts are in the incisal 1/3, the distal contact is:

A

More cervical than mesial contact

85
Q

From a lingual view of the mandibular lateral incisor, compare the lingual surface to the mandibular central incisor’s lingual surface

A

The same

86
Q

In the mandibular lateral incisor, the mesial & distal views are:

A

Quite similar

87
Q

The developmental depressions on the mesial & distal surfaces of the root in the mandibular lateral incisor are ______ than on the mandibular central incisor

A

More pronounced (deeper)

88
Q

On the mandibular lateral incisor, compare the distal & mesial root depressions:

A

Distal root depression is more marked than on mesial

89
Q

On the mandibular lateral incisor, the distal aspect is:

A

Twisted lingually

90
Q

When the mandibular lateral incisor is viewed from the distal what cannot be seen?

A

Lingual surface (marginal ridge)

91
Q

Label the following views of the mandibular lateral incisor:

A

Right- mesial
Left- distal

92
Q

From an incisal view of the mandibular lateral incisor, the incisal edge is _____ to the center of the tooth

A

Lingual

93
Q

From an incisal view of the mandibular lateral incisor, the tooth is not:

A

Symmetrical

94
Q

From a incisal view of the mandibular lateral incisor, the tooth is not symmetrical- the distal part of the crown appears to be curved:

A

Lingually

95
Q

From a incisal view of the mandibular lateral incisor- the _____ line angle is positioned more lingual

A

DF

96
Q

The root & pulp of the mandibular lateral incisor is similar to the central incisor but:

A

Slightly larger

97
Q

Describe the cross sectional root shape of the mandibular lateral incisor

A

Ovoid/round

98
Q

When viewing the root of the mandibular lateral incisor, the depression on the distal is ____ than on the central incisor

A

Deeper

99
Q

In the mandibular lateral incisor, typically how many pulp canals are present

A

One pulp canal

100
Q

In 40% of cases _____ pulp canals are present in the mandibular lateral incisor

A

Two

101
Q

Label the following views of the mandibular lateral incisor:

A

Facial, lingual, incisal, mesial, distal

Dental Morphology (11 decks)

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