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DMD 5300 Dental Anatomy 1 > Maxillary and Mandibular incisors (complete) > Flashcards

Maxillary and Mandibular incisors (complete) Flashcards

1
Q

What is the main function of the incisors

A

To cut and tear food during mastication

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2
Q

What are the secondary functions of the incisors

A
  1. articulate speech
  2. support lips (esthetics)
  3. guide mandible during movement
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3
Q

What do all teeth develop from

A

lobes

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4
Q

What is the minimum number of lobes a tooth can have

A

4

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5
Q

how many lobes do anterior teeth develop from

A

4

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6
Q

where are the lobes on anterior teeth located

A

3 on the facial side and incisal edge, one on the lingual surface

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7
Q

Where are the lobes found in molars

A

on the cusps

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8
Q

where are the lobes found in premolars

A

on the two cups and two marginal ridges

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9
Q

What is the shape that ALL crowns from the facial and lingual aspects. and how is it oreinted

A

Trapezoids, with the shorter of the parallel sides being gingival

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10
Q

What is the shape of the maxillary posterior teeth from the proximal aspect, and how are they oriented

A

trapezoids, with the longer of the parallel sides being gingival

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11
Q

What is the shape of the mandibular posterior teeth from the proximal aspect, and how is that shape oriented

A

Rhomboids, with the occlusal end of the teeth slanting towards the lingual side of the tooth

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12
Q

What is the shape of the anterior teeth from the proximal aspect, and how is that shape oriented

A

triangles, with the base of the triangle being gingival

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13
Q

What is the initiation of calcification for the mandibular Central incisor

A

3.5 months

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14
Q

What is the initiation of calcification for the mandibular lateral incisor

A

3.5 months

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15
Q

When is the crown of the mandibular central incisor completed

A

4.5 years

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16
Q

when is the crown of the mandibular lateral incisor completed

A

4.5 years

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17
Q

when does the mandibular central incisor erupt

A

6.5 years

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18
Q

when does the mandibular lateral incisor erupt

A

7.5 years

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19
Q

when is the root of the mandibular central incisor complete

A

9 years

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20
Q

when is the root of the mandibular lateral incisor complete

A

10 years

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21
Q

What are the identifications of the mandibular central incisors according to all three systems

A

24, 25 - universal
(lower left bracket) 1, and (lower right bracket) 1 - palmer
41, 31 - international

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22
Q

on the mandibular central incisor, how does the incisocervical crown dimension compare to the mesiodistal crown dimension

A

the incisocervical crown dimension is greater than the mesiodistal crown dimension

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23
Q

What is the smallest tooth in the mouth

A

the mandibular central incisor

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24
Q

Which tooth in the mouth is the most symmetrical (mesial/distally)

A

The central mandibular incisor

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25
Q

What are the proximoincisal angles like on the mandibular central incisor

A

they are the sharpest, and neither of them are really rounded

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26
Q

what is the incisal edge of the central mandibular incisor like

A
  1. it is straight

2. it is almost at a right angle to the long axis of the root

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27
Q

What are mamelons

A

they are manifestations of developmental depressions (small bumps on the edges, and middle of the incisal edge)

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28
Q

Why don’t we see many mamelons in adults

A

because they are worn away by function

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29
Q

What are the facial developmental grooves and depressions like on the central mandibular incisors

A

they are the fewest and smallest in the mouth along with the lateral mandibular incisors

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30
Q

Where are the proximal contacts of the central mandibular incisors located

A

in the incisal 1/3 at the same level as each other

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31
Q

Where in the cingulum on the mandibular central incisors

A
  1. on the lingual side of the tooth
  2. in the cervical 1/3 of the crown
  3. slightly offset to the distal from the axis of the root
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32
Q

What is the lingual surface anatomy of the mandibular central incisors like

A

the smoothest in the mouth (along with mandibular lateral incisors) the grooves, pits and ridges are very small if they are there at all

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33
Q

Can you distinguish between the mandibular and maxillary incisors by the lingual surface anatomy?

A

yes

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34
Q

How does the incisocervical crown dimension compare to the faciolingual crown dimension of the mandibular central incisors

A

the incisocervical crown dimension is greater than the faciolingual crown dimension

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35
Q

Where is the incisal edge of the mandibular central incisor located when looking at it from a proximal view

A

it is located lingual to the center of the root

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36
Q

Why is the incisal edge of the mandibular central incisor located linguallly

A

because the mandibular arch sits inside the maxillary arch.

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37
Q

What happens to the incisal edge of the mandibular central incisor due to wear (seen from the proximal view(

A

The incisal edge inclines facially

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38
Q

Where is the facial height of contour on the mandibular central incisor

A

in the cervical 1/3

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39
Q

Where is the lingual height of contour on the mandibular central incisor

A

in the cervical 1/3 (slighly inferior to the facial height of contour)

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40
Q

What is the shape of the lingual surface from a proximal view of the mandibular central incisor

A

S- shaped

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41
Q

What is the shape of the facial surface from a proximal view of the mandibular central incisor

A

Flat

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42
Q

What is the height of contour

A

the place where the tooth would first touch if we drew a line parallel to the axis of the root

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43
Q

What is the cervical line for like mesially and distally of the mandibular central incisor

A

on the mesial side it curves incisally 2-3 mm on average

on the distal side it curves incially, but less than it does on the mesial side

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44
Q

What is the root surface form like on the mandibular central incisor

A
  1. the developmental groove depression is usually more pronounced on the distal side
  2. roots are wider faciolingually than mesiodistally
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45
Q

How does the faciolingual crown dimension compare to the mesiodistal crown dimension on the mandibular central incisor

A

the faciolingual crown dimension is greater than the mesiodistal crown dimension

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46
Q

How does the incisal edge look on the mandibular central incisor from the incisal view

A

it is straight mesiodistally (perpendicular to the faciolingual bisector)

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47
Q

What is the most notable characteristic of the mandibular central incisor from the incisal view

A

the symmetry of the mesial and distal halves of the crown

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48
Q

What are the identifications of the mandibular lateral incisors according to all three systems

A

26,23 - Universal system
(bottom left bracket) 2, (bottom right bracket) 2 - palmer
42, 32 - international system

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49
Q

How common is it to have a labial and lingual root division on the mandibular lateral incisor

A

rare

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50
Q

is it more or less common to have two canals in one root on the mandibular lateral incisors than it is to have labial and lingual root division

A

more common

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51
Q

on the mandibular lateral incisor, how does the incisocervical crown dimension compare to the mesiodistal crown dimension

A

the incisocervical crown dimension is greater than the mesiodistal crown dimension

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52
Q

Which is wider mesiodistally, the mandibular central incisor, or the mandibular lateral incisor

A

the mandibular lateral incisor

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53
Q

Does the incisal edge of the mandibular lateral incisor slope cervically from the facial view?

A

yes, it slopes cervically toward the distal

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54
Q

From the facial view, is the mandibular lateral incisor symmetrical mesiodistally?

A

no, the mesial half is not symmetrical to the distal half. (the mandibular central incisor is)

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55
Q

What are the incisal angles like from the facial view on the mandibular lateral incisor

A

the mesioincisal angle is sharp

the distoincisal angle is more rounded

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56
Q

Where are the proximal contacts of the mandibular lateral incisor

A

in the incisal 1/3, close to the incisal edge

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57
Q

Where is the cingulum of the mandibular lateral incisor

A

on the lingual surface, offset to the distal

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58
Q

How do the marginal ridges of the mandibular lateral incisor compare?

A

The mesial marginal ridge is slightly longer incisocervically than the distal marginal ridge

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59
Q

What is the lingual fossa like on the mandibular lateral incisor

A

smooth and barely visible

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60
Q

how do the incisocervical crown and the faciolingual crown dimensions compare on the mandibular lateral incisor

A

the incisocervical crown dimension is greater (larger) than the faciolingual crown dimension.

61
Q

Where are the heights of contour found on the mandibular lateral incisor?

A

In the cervical 1/3

62
Q

Where is the incisal edge of the Mandibular Lateral Incisor located in relation to the center of the root from the proximal view

A

The incisal edge is lingual to the midroot axis

63
Q

Where is the distinguishing root concavity on the Mandibular Lateral Incisor from the proximal view

A

it is found on the distal surface

64
Q

How does the faciolingual crown dimension compare to the mesiodistal crown dimension on the Mandibular Lateral Incisor

A

the crown is larger faciolingually than mesiodistally

65
Q

What does it mean that the crown of the Mandibular Lateral Incisor appears twisted on the root?

A

The distal portion of the incisal edge is located lingual to the mesial portion of the incisal edge.

66
Q

Why can you see the distal marginal ridge of the Mandibular Lateral Incisor from the mesial view

A

because the crown of the root appears to be twisted. The distal portion of the incisasl edge is more lingual than the mesial portion of the incisal edge

67
Q

Where is the cingulum of the Mandibular Lateral Incisor located

A

a little displaced toward the distal

68
Q

how developed is the cingulum of the Mandibular Lateral Incisor

A

along with the mandibular central incisor it is the LEAST developed

69
Q

What happens to the mamelons on the incisal edge of the incisors

A

they are eventually worn away by abrasion from the opposing tooth

70
Q

What is the wear pattern on the incisal edge of the mandibular incisors

A

the wear is more toward the facial surface

71
Q

What is the wear pattern on the incisal edge of the maxillary incisors

A

The wear is more toward the lingual surface

72
Q

What happens to the pulp chamber with age

A

the size of the pulp chamber decreases

73
Q

What is a vertucci type 1 canal

A

one orifice
one canal
one apical forament

74
Q

on the mandibular arch, which is larger the lateral incisor or the central incisor

A

The Lateral incisor

75
Q

on the mandibular arch, which is more “angular” (Sharper angles) the Central or lateral incisor

A

The Central incisor

76
Q

on the mandibular arch, which tooth has the incisal edge that appears to be slightly twisted, the Central or lateral incisor

A

The Lateral incisor

The central incisor’s incisal edge is straight

77
Q

on the mandibular arch, how do the cingulum of the central and lateral incisors compare

A

Neither of them are very developed

both are also offset to the distal, but more so on the lateral incisor

78
Q

how does the lingual surface anatomy of the mandibular incisors compare to the lingual surface anatomy of the maxillary incisors?

A

The lingual surface anatomy of the mandibular incisors is more inconspicuous than the maxillary lingual surface anatomy

79
Q

when is the initiation of calcification for the maxillary Central incisors

A

3.5 months

80
Q

When is the initation of calcification for the maxillary lateral incisors

A

3.5 months

81
Q

When is the crown complete for the maxillary central incisors

82
Q

When is the crown complete for the maxillary lateral incisors

83
Q

When is the eruption of the Maxillary central incisors

84
Q

When is the eruption of the maxillary lateral incisors

85
Q

When is the root complete for the Maxillary lateral incisors

86
Q

When is the root complete for the maxillary central incisors

87
Q

What is the universal number given to the Maxillary central right incisor

88
Q

What is the universal number given to the maxillary central left incisor

89
Q

what is the international number given to the maxillary central incisors

90
Q

what is the palmar numbers given to the maxillary central incisors

A

upper right and left brackets with ones in them

91
Q

on the Maxillary central incisor how does the incisocervical dimension compare to the mesiodistal dimension

A

the incisocervical dimension is greater

92
Q

What are the line angles like on the Maxillary central incisors

A

the distoincisal edge is more rounded, the mesioincisal edge is more square

93
Q

what is the incisal edge from the facial view like for the Maxillary central incisor

A

it is almost straight

94
Q

what were the mammelons like on the Maxillary central incisor

A

three of them on the incisal edge, with the mesial and distal ones being larger than the central one

95
Q

Where are the proximal contacts of the Maxillary central incisor

A 
Mesial = incisal 1/3
Distal = junction of incisal and middle 1/3
96
Q

how do the developmental grooves of the Maxillary central incisor compare to the developmental grooves of the mandibular central incisor

A

they are more evident

97
Q

From the facial view what shape is the root of the Maxillary central incisor

A

it is cone shaped

98
Q

how long is the root of the Maxillary central incisor relative to its crown

A

it is short, infact it has the shortest root relative to its own crown

99
Q

how does the cervical line on the lingual side of the Maxillary central incisor compare to the cervical line on the facial side

A

the cervical line is more concave on the lingual side than it is on the facial side

100
Q

What is the shape of the lingual fossa of the Maxillary central incisor

A

it is trapezoidal

101
Q

what borders the lingual fossa of the maxillary central incisor

A

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

102
Q

how developed in the cingulum of the Maxillary central incisor

A

well developed

103
Q

how do the crest of the cingulum and the peak of the cervical line compare to the M-D bisector

A

they are both slightly distal

104
Q

how does the incisal ridge of the Maxillary central incisor line up faciolingually from the proximal view

A

it is centered

105
Q

where are the facial and lingual heights of contour of the Maxillary central incisor located

A

in the cervical third

106
Q

how is the mesial cervical line curvature of the Maxillary central incisor compared to others on other teeth

A

the cervical line curvature on the mesial side of the maxillary central incisor is greater than on any other tooth in the mouth

107
Q

what is the root surface like from the proximal view of the Maxillary central incisor

A

smooth without any depressions

108
Q

how does the mesiodistal crown dimension of the Maxillary central incisor compare to the faciolingual dimension

A

it is greater mesiodistally

109
Q

how does the incisal ridge from the incisal view of the Maxillary central incisor line up

A

it is straight and perpendicular to the M-D bisecting plane

110
Q

where are the proximal contacts located from the incisal view of the Maxillary central incisor

A

they are centered Faciolingually

111
Q

where is the cingulum of the Maxillary central incisor located mesiodistally

A

slightly to the distal

112
Q

What are the universal numbers for the maxillary lateral incisors

113
Q

how does the incisocervical dimension of the maxillary lateral incisors compare to their mesiodistal dimension

A

it is greater incisocervically

114
Q

Where are the proximal contacts of the maxillary lateral incisors located

A 
Mesial =  junction of incisal and middle 1/3
Distal  = middle 1/3
115
Q

how do the line angles of the maxillary lateral incisors appear

A

they are more rounded than the maxillary central incisors

116
Q

on which tooth is the crown surface convex in all directions

A

the maxillary lateral incisors

117
Q

What are the proximal contacts of the anterior teeth

A 
Max = IJ, JM, JM
Man = II, II, IM
118
Q

how does the root of the maxillary lateral incisors compare to the root of the maxillary central incisors

A

it is usually longer

119
Q

what is the curvature of the maxillary lateral incisors lik

A

it is more elliptical than that of the maxillary central incisors

120
Q

where does the peak of the cervical line of the maxillary lateral incisors from the facial view line up

A

distal to the M-D bisector

121
Q

what is the root of the maxillary lateral incisors like from the facial view

A

it has a curvature in the apical 1/3

122
Q

What is the cingulum like on the maxillary lateral incisors

A

it is narrow mesiodistally and slightly to the distal

123
Q

what shape does the cingulum combined with the marginal ridges of the maxillary lateral incisors make

A

a letter U shape

124
Q

how does the lingual fossa of the maxillary lateral incisors compare the lingual fossa of the maxillary central incisors

A

it is deeper and more concave

it is triangle shaped

125
Q

is there a groove/pit on the lingual side of the maxillary lateral incisors

A

it is frequently detecable on the incisal end of the cingulum

126
Q

on which tooth does the linguogingival groove sometimes show up

A

the maxillary lateral incisors

127
Q

which way does the linguogingival groove go

A

from the lingual pit down toward the root on the distal side

128
Q

on the maxillary lateral incisors from the proximal view how does the mesial cervical line compare to the distal cervical line

A

Mesial side curves more than the distal side

129
Q

from the proximal view of the maxillary lateral incisors how does the incisal edge line up with the root

A

it is centered over the root

130
Q

where are the heights of contour of the maxillary lateral incisors located

A

facial and lingual are both in the cervical 1/3

131
Q

how does the mesiodistal crown dimension of the maxillary lateral incisors compare to the faciolingual crown dimension

A

the mesiodistal is slightly greater than the faciolingual

132
Q

from the incisal view of the maxillary lateral incisors, how is the incisal ridge lined up

A

it is centered faciolingually

133
Q

where is the cingulum (mesiodistally) on all anterior teeth

A

they all incline or point distally

134
Q

Which tooth has the 2nd most developmental anomalies

A

the maxillary lateral incisors

135
Q

What are peg laterals

A

maxillary lateral incisors in which only the central lobe develops

136
Q

What are the symptoms of hunchinsons incisor

A
  1. crown of incisors resemble screwdrivers

2. mulberry molars

137
Q

Which is larger the maxillary lateral incisors or the maxillary central incisors

A

the central

138
Q

which is more angular the maxillary lateral incisors or the maxillary central incisors

A

the central

139
Q

which has the straighter root the maxillary lateral incisors or the maxillary central incisors

A

the central

140
Q

which has the longer root the maxillary lateral incisors or the maxillary central incisors

A

the lateral

141
Q

which incisal third is more flat the maxillary lateral incisors or the maxillary central incisors

A

the central

142
Q

which incisal third is more convex the maxillary lateral incisors or the maxillary central incisors

A

the lateral

143
Q

which one is more variable the maxillary lateral incisors or the maxillary central incisors

A

the lateral

144
Q

which one has the crest of the cingulum offset to the distal the maxillary lateral incisors or the maxillary central incisors

A

they are both offset to the distal

145
Q

which one has a triangular shaped lingual fossa the maxillary lateral incisors or the maxillary central incisors

A

the lateral

146
Q

which one has the trapezoidal shaped lingual fossa the maxillary lateral incisors or the maxillary central incisors

A

the central

147
Q

from a proximal view which one has an incisal edge that is centered over the crest of curvature and the root apices the maxillary lateral incisors or the maxillary central incisors

A

they are both centered

148
Q

which one has a more commonly lingual pit and fissure the maxillary lateral incisors or the maxillary central incisors

A

the lateral

DMD 5300 Dental Anatomy 1 (5 decks)

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