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Dental Morphology > Morph Exam 1 midterm lectures 1-7 > Flashcards

Morph Exam 1 midterm lectures 1-7 Flashcards

1
Q

On which surface of the permanent maxillary central incisor does the cervical line exhibit the greatest amount of curvature?

A

mesial

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2
Q

Which of the following is the most frequently missing anterior tooth?

A

maxillary lateral incisor

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3
Q

How many pulp horns do the maxillary lateral incisors have?

A

2

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4
Q

How many pulp horns do the maxillary central incisors have?

A

3

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5
Q

Compared to the maxillary central incisor, the lingual fossa of the maxillary lateral incisor is:

A

deeper

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6
Q

How does the mesioincisal line angle of the maxillary later incisor compare to the maxillary central incisor?

A

More rounded

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7
Q

Which anterior tooth varies in form more than any other tooth?

A

Maxillary lateral incisor

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8
Q

When is the eruption of the maxillary lateral incisors?

A

8-9 years

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9
Q

What are some features of the maxillary lateral incisor compared to the m. central incisors?

A
  • Smaller in all dimensions (except length of root) - More rounded - More pronounced mesial and distal marginal ridges (lingual fossa is deeper) - More often exhibit lingual pits - May have lingual developmental groove
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10
Q

What is the geometric form of the m. lateral incisor from the facial view?

A

trapezoidal

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11
Q

Where is the mesial height of contour in the maxillary lateral incisor?

A

junction of the middle and incisal 1/3’s

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12
Q

Where is the distal height of contour in the maxillary lateral incisor?

A

Middle 1/3 (more rounded distally so it will be higher)

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13
Q

Is the labial surface more convex in the maxillary central or maxillary lateral incisor?

A

Maxillary lateral incisor

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14
Q

All of the following incisal angles are rounded EXCEPT the:

A

Mesioincisal angle of the Maxillary central incisor

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15
Q

According to the universal notation system, tooth #26 is the:

A

Mandibular right lateral incisor

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16
Q

Which tooth is 2x as long mesio gingivaly as it is mesio distally?

A

mandibular central incisor

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17
Q

What is the only symmetrical tooth in the mouth?

A

mandibular central incisor

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18
Q

What are the MI and DI angles of the mandibular central incisor?

A

90 degrees

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19
Q

True or false, both contacts of the mandibular central incisor occur at the same level?

A

True Level is incisal 1/3

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20
Q

Regarding the mesioincisal and distoincisal angles of the mandibular central incisors:

A

both are right angles

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21
Q

The smallest permanent tooth in the mouth is the:

A

mandibular central incisor

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22
Q

Which of the following is a characteristic of ALL mandibular incisors?

A

they have marginal ridges on their lingual surface

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23
Q

Which of the following permanent incisors has the deepest lingual fossa?

A

Maxillary lateral incisor

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24
Q

When does the maxillary central incisor erupt?

A

7-8 years

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25
Q

What is the name of the highlighted embrasure? (embrasure superior to maxillary incisors)

A

Gingival embrasure

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26
Q

What is the name of the highlighted embrasure? (embrasure pointing facially/bucally)

A

facial embrasure

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27
Q

When is the first sign of tooth development?

A

6-7 weeks in utero

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28
Q

What is the longest tooth in the maxillary arch?

A

Maxillary canine

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29
Q

How many lobes does the maxillary canine develop from?

A

4

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30
Q

What is the first permanent tooth to erupt?

A

Mandibular first molar

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31
Q

Which anterior tooth is most likely to have a bifurcated root?

A

mandibular canine

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32
Q

In comparison to a mandibular canine, a maxillary canine:

A

Has a cusp tip that is 1/3 of crown surface

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33
Q

Which of the following teeth is broader faciolingually than mesiodistally?

A

mandibular central incisor

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34
Q

Using universal notation, what is the tooth number of the permanent maxillary left 1st molar?

A

14

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35
Q

What tooth number is the maxillary right 1st premolar?

A

5

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36
Q

What tooth number is the maxillary right 2nd premolar?

A

4

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37
Q

What tooth number is the maxillary right canine?

A

6

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38
Q

What tooth number is the maxillary left canine?

A

11

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39
Q

What tooth number is the maxillary left 1st premolar?

A

12

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40
Q

What tooth number is the maxillary left 2nd premolar?

A

13

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41
Q

What tooth number is the maxillary left 1st molar?

A

14

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42
Q

What tooth number is the maxillary right 1st molar?

A

3

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43
Q

What tooth number is the mandibular right 3rd molar?

A

32

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44
Q

What tooth number is maxillary right 2nd molar?

A

2

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45
Q

Which cusp of the pre molar is functional?

A

Lingual

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46
Q

how many lobes do the maxillary pre molars develop from?

A

4

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47
Q

Central development groove

A

demarcation between buccal and lingual lobes

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48
Q

When does the maxillary 1st premolar typically erupt?

A

10-11 years

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49
Q

Traits of first pre molar buccal cusp

A
  • mesial cusp arm is longer and straighter - distal cusp arm is shorter and more curved (opposite of what we saw in canine)
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50
Q

Where is the buccal height of contour in the maxillary 1st premolar?

A

cervical 1/3

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51
Q

Where is the mesial contact in the maxillary 1st premolar?

A

middle 1/3 (offset buccally)

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52
Q

Distal contact of the maxillary 1st premolar

A

-middle 1/3 - broader and more cervically located (compared to mesial)

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53
Q

Middle buccal lobe of max. 1st premolar

A

gives rise to buccal ridge gives rise to buccal cusp

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54
Q

When viewed from the buccal, what is the geometric form of the maxillary 1st premolar?

A

Trapezoid

55
Q

Is the 1st max premolar broader (M-D) lingually or buccally?

A

-buccally - (crown tapers on lingual side)

56
Q

Lingual cusp trends of max first pre molar

A
  • mesiolingual cusp arm is shorter than distolingual cusp arm (opposite of the buccal cusp)
57
Q

Where is the lingual height of contour in the maxillary first premolar?

A

middle 1/3

58
Q

how much of the maxillary 1st premolar root is encompassed by the root trunk?

A

1/2 - 2/3 of root

59
Q

How many pulp horns are found in the permanent maxillary canine?

A

1

60
Q

Maxillary 2nd premolar buccal cusp trends

A

-mesial buccal cusp ridge is shorter than the disto buccal cusp ridge (opposite of 1st max premolars) - buccal cusp is not as long

61
Q

Lingual cusp trends of max 2nd premolar

A

Lingual cusp is longer than lingual cusp of 1st max pre molar

62
Q

Maxillary 2nd premolar Mesial view

A

-Mesial contact in middle 1/3 (slightly offset buccally) -No mesial marginal ridge developmental ridge - No mesial developmental depression - single tapered root - buccal and lingual cusp are approximately equal in size and shorter than 1st max pre molar

63
Q

heights of contour in maxillary 2nd pre molar?

A

-lingual is in middle 1/3 - buccal is in cervical 1/3

64
Q

Distal contact of maxillary 2nd pre molar?

A

-middle 1/3 (offset bucally)

65
Q

True or False? In the maxillary 1st premolar, the mesial cusp arm of the buccal cusp is shorter than the distal cusp arm?

A

false

66
Q

Which of the following teeth has a root trunk that is 1/2 to 2/3’s the length of the root?

A

Maxillary 1st pre molar

67
Q

Which of the following teeth have crowns that are narrower buccolingually than mesiodistally? Maxillary central incisors Maxillary canines Maxillary 1st premolars Maxillary 2nd premolars

A

Maxillary central incisors

68
Q

The mesial marginal ridge groove is found in which of the following teeth? Maxillary canines Mandibular canines Maxillary 1st premolars Maxillary 2nd premolars Both maxillary 1st and 2nd premolars

A

Maxillary 1st premolars

69
Q
A
69
Q

Identify this tooth

A

Maxillary first pre molar

70
Q

What tooth number is the madibular left premolar?

A

21

71
Q

What tooth number is the mandibular left 2nd premolar?

A

20

72
Q

What tooth number is mandibular right 1st premolar?

A

28

73
Q

Are the mandibular premolars succedaneous teeth?

A

Yes, they replace the primary molars

74
Q

How many lobes do the madinular 2nd molars develop from?

A

4 or 5

75
Q

Is the mesial line of the buccal cusp, longer or shorter than the distal in the mandibular first premolar?

A

It is shorter (this is opposite of the maxillary first premolar)

76
Q

Where are the heights of contour in the madibular first premolar? (buccal view)

A

middle 1/3

77
Q

Is the mandiublar premolar wider M-D at the contact point or at the cervix?

A

At the contac points (crown narrows towards the cervix)

78
Q

The outline of the crowns of all posterior teeth from the facial and lingual views is best described as:

Oval

Rhomboidal

Trapezoidal

Triangular

A

trapezoidal

79
Q

mesio lingual developmental groove (found in mandibular 1st premolar)

A
  • demarcates the lingual lobe from the mesiobuccal lobe
  • seperates mesial marginal ridge from lingual cusp
80
Q

What shape is the 1st mandibular premolar from the mesial view?

A

rhomboidal

81
Q

Buccal cusp tip of mandibular 1st premolar

A

-centered over midline of the root

82
Q

What is the buccal height of contour of the mandibular 1st premolar?

A

At the juncion of the middle and cervicle 1/3

83
Q

Lingual height of contour in mandibular premolar

A
  • lingual to outline of root
  • in the middle 1/3
84
Q

True or False in mandibluar 1st premolars: The distance from the CEJ to the lingual cusp tip is 2/3 the distance of the CEJ to the Buccal cusp tip

A

True

85
Q

The embrasures of posterior teeth are called:

A

occlusal, gingival, lingual, buccal

86
Q

In the mandibular 1st premolar, which is higher above the cej? The distal marginal ridge or the mesial marginal ridge

A

The distal marginal ridge

-(only tooth in which the mesial marginal ridge is at a lower level than the distal marginal ridge)

87
Q

Which contact area in the mandibular first pre molar is broader?

  • distal or mesial
A

distal

(located in the middle 1/3)

88
Q

Occulsal view of the mandiublar first pre molar

A
  • diamond outline
  • buccal cusp and buccal ridge are pronounced
  • lingual cusp is small

-mesiobuccal cusp ridge is shorter than the distobuccal cusp ridge

89
Q

Mandibular first molar width

A

-Wider (M-D) in the buccal than it is the lingual

90
Q

Transverse ridge

A

present in mandibular 1st premolar

  • formed from the buccal triangular ridge and lingual triangular ridge
  • seperates occlusal fossa
91
Q

is the mesial or distal triangular fossa larger in mandiublar 1st premolar?

A

distal

92
Q

In the mandibular first premolar, which groove separates the mesial marginal ridge from the lingual cusp?

A

mesiolingual groove

93
Q

There are two types of mandibular 2nd pre molars

A
  • 3 cusp type (5 lobes)
  • 2 cusp type (4 lobes)
94
Q

Buccal cusp of 2nd mandibular pre molar

A

-shorter and less pointed than first

95
Q

Are the Lingual lobes better developed in the 1st or 2nd mandibular pre molars?

A

2nd

96
Q

What seperates the two lingual cusps on a 3 cusped mandibular 2nd premolar?

A

the lingual groove

97
Q

How does the mandibular 2nd molar differ from the mandibular 1st molar?

A
  • Crown and root are wider buccolingualy
  • Buccal cusp tip is not as lingually placed
  • Buccal cusp tip is shorter
  • Lingual and Buccal cusps are more equal in size
  • Mesial marginal ridge is at right angle to the long axis of the tooth
  • No mesialingual developmental groove
  • Root is longer and the apex is more blunt
98
Q

When viewed from the mesial aspect, the position of the buccal cusp tip of the mandibular 1st premolar is:

A

centered over the midline of the tooth

99
Q

Occlusal view of 3 cusp mandibular 2nd molar

A
  • square in shape
  • two lingual cusps
  • one buccal cusp

Buccal> mesolingual > distolingual

100
Q

Three cusp type

A
  • developmental grooves seperate the cusps forming a Y shape on occlusal surface (mesial, distal, and lingual developmental grooves)
  • Central pit
  • Mesial triangular fossa and distal triangular fossa
101
Q

Two cusp type (mandibular 2nd molar)

(occlusal view)

A
  • H or U developmental grooves
  • Outline is rounded
  • lingual convergence of the mesial and distal marginal ridges
  • H shape more common
  • Lingual cusp well developed
  • mesial and distal fossa
  • Central develop mental groove

_ may or may not have grooves

102
Q

Overview of Mandibular 2nd premolars

A
103
Q

The premolar with the occlusal groove pattern that may simulate the letter “Y” is the:

A

mandibular 2nd premolar

104
Q

Which of the following premolars often has two roots?

A

Maxillary 1st premolar

105
Q

What are the tooth numbers of the central incisors?

A

Maxillary (8,9)

Mandiublar (24,25)

106
Q

What are the tooth numbers of the lateral incisors?

A

Maxillary (7,10)

Mandibular (23,26)

107
Q

What are the tooth numbers of the canines?

A

Maxillary (6, 11)

Mandibular (22, 27)

108
Q

What are the tooth numbers of the premolars?

A

Maxillary (4,5, 12,13)

Mandibular (20,21, 28,29)

109
Q

What tooth number are the molars?

A

Maxillary (1,2,3, 14,15,16)

Mandibular (17,18,19, 30,31,32)

110
Q

When is the first sign of tooth development?

A

6-7 weeks in utero

111
Q

When do deciduous teeth begin to calcify?

A

13-20 weeks in utero

112
Q

When do decidous teeth complete calcification?

A

18-20 weeks in utero

113
Q

When do decidous teeth starts to erupt?

A

6-30 months

114
Q

Eruption

A

emergence into the. oral cavity

115
Q

Exfoliation

A

loss of a deciduos tooth

116
Q

How many pre molars are in decidous teeth?

A

0

117
Q

Deciduous dentition

A

Only when deciduous teeth are in the mouth (up to 6 years of age)

118
Q

Mixed dentition

A

Mixture of permanent and decidous teeth

119
Q

Non-succedaneous teeth

A

Do not replace primary dentition

120
Q

Is the apex of the root in the maxillary central incisor slightly distal or mesial to the long axis of the tooth?

A

distal

121
Q

The root of #8/9 is longer than the crown? T/F

A

true

122
Q

What has the greatest amount of curviture of any tooth in the mouth?

A

The mesial cervical line of the maxillary central incisors

123
Q

The shape of the maxillary central incisor when viewed from the mesial is best described as:

A

triangular

124
Q

Embrasure trends

A
125
Q

Mandibular central incisor cej

A
  • extends one mm longer apically on lingual than labial
  • curves 1 mm less on distal than mesial
126
Q

In which premolar is the mesial marginal ridge at a lower level than the distal marginal ridge?

A
  • mandibular 1st pre molar
127
Q

Which pre molar may have a lingual developmental groove?

A
  • mandibular 2nd pre molar (3 cusp y shaped type)
128
Q

Which of the following premolars most frequently has only one pulp horn?

A
  • mandibular 1st pre molar
129
Q

1 of 1

close

In which of the following premolars is the mesial cusp ridge of the buccal cusp longer than the distal cusp ridge of the buccal?

A
  • maxillary 1st premolar
130
Q

how many cusps are in the mandibular 1st molar?

A
  • 5
131
Q

how many cusps are in the mandibular second molar?

A
  • 4
132
Q
A

Dental Morphology (5 decks)

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