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Dental Morphology > Mandibular Incisors > Flashcards

Mandibular Incisors Flashcards

1
Q

What are the numbers of the mandibular central incisors?

A

24 & #25

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2
Q

What are the numbers of the Mandibular lateral incisors?

A

23 and #26

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3
Q

Where two adjacent teeth contact:

A

Interproximal contact

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4
Q

The spaces/spillways that widen out from the contact are called:

A

Embrasures

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5
Q

Anterior teeth have 4 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 large in anterior teeth, the facial or lingual space?

A

They’re equal

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8
Q

Posterior teeth have 4 embrasure spaces:

A

Occlusal, gingival (cervical), facial, and lingual

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9
Q

In posterior teeth, is the occlusal or gingival embrasure larger?

A

They’re 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

A

A: gingival (cervical) embrasure
B: incisal embrasure
C: facial embrasure
D: lingual embrasure

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12
Q

Label:

A

A: occlusal embrasure
B: gingival (cervical) embrasure
C: facial embrasure
D: lingual embrasure

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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 there?

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 incisors

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18
Q

Mandibular incisors are broader ____ than _____.

A

Buccolingually (BL) than Mesiodistally (MD)

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19
Q

What outline is the mandibular central incisor?

A

Trapezoidal

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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 incisors when the tooth erupts?

A

Mamelons

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23
Q

The crown is approximately 2x as ____ as it is ____.

A

2x as long IG as it is wide 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 and taper to the cervix

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25
Q

From a facial view of a mandibular central incisor, the mesioincisal and distoincisal line angle 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 a mandibular central incisor, the mesial and distal contact areas are in the:

A

Incisal 1/3

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28
Q

From a facial view of a 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 it located in the same 1/3 or junction)

A

Distal contact ; mesial contact

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30
Q

From a facial view of a 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 a 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 _____ and becomes more ____ ______.

A

Flat in the incisal 1/3; more convex cervically

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33
Q

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

A

Single root

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34
Q

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

A

Narrow MD and 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 is smooth and 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 ____ and only minor elevations.

A

Mesial and 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

Music 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 the bisecting 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

From a mesial view of a mandibular central incisor, the CEJ curves ____ about 1mm 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 it does on the distal

47
Q

On the mandibular central incisor, when worn, the incisal edge angles to the:

A

Facial

48
Q

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

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 on the Mandibular central incisor, the crown may have a concavity below the _____ and above the _____

A

Middle 1/3; cervical line

51
Q

From a mesial view on the Mandibular central incisor, the root extends straight from the CEJ and tapers apically from the:

A

Middle 1/3

52
Q

From a mesial view on the Mandibular central incisor, the root may have a broad ______ along its length

A

Developmental depression

53
Q

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

A

Less

54
Q

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

A

Greater

55
Q

From a incisal view on the Mandibular central incisor, what is obvious about the tooth?

A

The symmetry

56
Q

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

A

Lingual

58
Q

From a incisal view on the Mandibular central incisor, the tooth converges ____.

A

Lingually

59
Q

From a incisal view on 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 on the Mandibular central incisor, the contact areas are centered _____.

A
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 ___ and ___.

A

Mesial & distal

64
Q

On the mesial and distal sides of the root of the mandibular central incisor, what are present?

A

Developmental depressions

65
Q

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

A

Distal depression; mesial depression

66
Q

On a mandibular central incisor, the cross section of the root is what shape? And contains:

A

Round/ovoid ; depressions on mesial and distal

67
Q

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

A

Usually 1

68
Q

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

A

MD= narrow
FL= broad

69
Q

~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 the mandibular central incisor, what are the names?

A

Facial and lingual canals

71
Q

Label:

A

Facial
Lingual
Incisal
Mesial
Distal

72
Q

The mandibular lateral incisor resembles what tooth?

A

Mandibular central incisor

73
Q

What is larger, the mandibular central or mandibular lateral incisor?

A

Mandibular lateral incisor

74
Q

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

A

Wider MD

75
Q

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

A

To distal aspect of tooth

76
Q

Label:

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 on the Mandibular lateral incisor, the distal crown height is often ____ compared to the mesial crown height:

A

Shorter

79
Q

From a facial view on the Mandibular lateral incisor, the incisal edge slopes:

A

Downward distally

80
Q

From a facial view on the Mandibular lateral incisor, the mesioincisal angle is:

A

A sharp 90 degrees

81
Q

From a facial view on the Mandibular lateral incisor, the distoincisal angle is:

A

Rounded

82
Q

From a facial view on the Mandibular lateral incisor, the lateral is wider ____ than the compared to the central incisor

A

MD

83
Q

From a facial view on the Mandibular lateral incisor, the mesial and distal contacts are in the:

A

Incisal 1/3

84
Q

From a facial view on the Mandibular lateral incisor, although both mesial and distal contacts are in the incisal 1/3, the distal contact is:

A

More cervical

85
Q

From a lingual view on the Mandibular lateral incisor, compare the lingual surface to the mandibular central incisors lingual surface

A

Same

86
Q

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

A

Quite similar

87
Q

The developmental depressions on the mesial and distal surfaces of the root on 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 and 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:

A

Left- mesial
Right- distal

92
Q

From the incisal view of the mandibular lateral incisor, the Incisal edge is ____ to the center of the tooth

A

Lingual

93
Q

From the incisal view of the mandibular lateral incisor, the tooth is not _______.

A

Symmetrical

94
Q

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

A

DF

96
Q

The root and 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 in the central incisor.

A

Deeper

99
Q

How many pulp canals are present typically in the the mandibular lateral incisor?

A

Single

100
Q

~40% of the time in mandibular lateral incisors, ____ canals are present:

A

2

101
Q

Label:

A

Facial
Lingual
Incisal
Mesial
Distal

Dental Morphology (11 decks)

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