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Dental Morphology > Maxillary Molars > Flashcards

Maxillary Molars Flashcards

1
Q

On the maxillary molars, how many roots are present?

A

Three roots

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2
Q

What are the roots of the maxillary molars?

A

2 buccal, 1 lingual

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3
Q

For maxillary molars out what root is the largest?

A

1 lingual

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4
Q

Name the views of the maxillary molars:

A

Buccal; lingual

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5
Q

The maxillary 2nd molar has ____ cusps; while the maxillary 1st molar has _____ cusps

A

4 cusps ; 5 cusps

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6
Q

What cusp is the largest in maxillary molars?

A

Mesiolingual cusps

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7
Q

What are the 4 cusps of the maxillary 2nd molar?

A

Distobuccal, distolingual, mesiobuccal, mesiolingual

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8
Q

In maxillary molars, what cusps form the trigon or primary cusp triangle?

A

Mesiolingual, mesiobuccal and distobuccal

(ML, MB, DB)

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9
Q

In maxillary molars, the ML, MB, and DB cusps form a :

A

Trigon or primary cusp triangle

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10
Q

In maxillary molars, the ____ cusp is the smallest, and ______ in size from the 1st to 3rd molar

A

DL cusp; decreases

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11
Q

In maxillary molars, the crowns are broader ____ than ____.

A

BL than MD

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12
Q

In maxillary molars, the crowns are relatively short:

A

Occlusal-cervically

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13
Q

In maxillary molars, the DB cusp is connected to the ML cusp by an:

A

Oblique ridge

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14
Q

In maxillary molars, what forms the oblique ridge?

A
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15
Q

The distal cusp ridge of the ML cusp and the triangular ridge of the DB cusp make up the ____ on what tooth?

A

Oblique ridge; maxillary 1st molar

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16
Q

What makes up the oblique ridge of the maxillary first molar?

A

The distal cusp ridge of the ML cusp, and the triangular ridge of the DB cusp

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17
Q

Label the following views of the maxillary 1st molar:

A

Top left: buccal
Top right: lingual
Bottom left: mesial
Bottom right: distal
Middle: occlusal

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18
Q

Maxillary 1st molar: Buccal

The crown outline is:

A

Roughly trapezoidal

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19
Q

Maxillary 1st molar: Buccal

What is visible from this view?

A

Parts of the 4 major cusps

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20
Q

Maxillary 1st molar: Buccal

The distal profile is ______; the mesial profile is ____

A

Convex; convex and flat

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21
Q

Label the following image of the maxillary 1st molar - what view is this from and where is mesial and distal?

A

Buccal view

Left: distal
Right: mesial

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22
Q

Maxillary 1st molar: Buccal

Compare the MB and DB cusps:

A

MB cusp is larger & the DB cusp is more pointed

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23
Q

Maxillary 1st molar: Buccal

The MB and DB cusps are separated by :

A

Buccal developmental groove

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24
Q

Maxillary 1st molar: Buccal

The buccal developmental groove separates:

A

MB and DB cusps

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25
Q

Maxillary 1st molar: Buccal

Where are the mesial and distal contacts located?

A

Middle 1/3

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26
Q

Maxillary 1st molar: Buccal

Which contact is slightly more cervical?

A

Distal contact

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27
Q

What is the blue line showing? What view is this from? (Maxillary 1st molar)

A

Buccal aspect: buccal developmental groove

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28
Q

Maxillary 1st molar: Buccal

An interesting fact is that there is often a concavity present at the:

A

Cervical area on the distal surface of the DB cusp

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29
Q

Maxillary 1st molar: Buccal

What is often present at the cervical area on the distal surface of the DB cusp?

A

Concavity

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30
Q

Maxillary 1st molar: Buccal

What is significant about the often present concavity at the cervical area on the distal surface of the DB cusp? (2)

A
  1. Can complicates restorations
  2. Difficult to remove calculus
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31
Q

Maxillary 1st molar: Buccal

How many roots are visible from this view?

A

3

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32
Q

Maxillary 1st molar: Buccal

Root that is straight, curves distally, and apex is in line with MB tip

A

Mesiobuccal root

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33
Q

Maxillary 1st molar: Buccal

The smallest, distal inclination, then mesial root

A

Distobuccal root

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34
Q

Maxillary 1st molar: Buccal

The longest, in line with the buccal groove (root)

A

Lingual/palatal

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35
Q

Maxillary 1st molar: Buccal

The root trunk takes up ____ the length of the root

A

1/3

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36
Q

Maxillary 1st molar: Buccal

The point of bifurcation is:

A

4mm Apical CEJ

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37
Q

Maxillary 1st molar: Buccal

The roots of this tooth are: (relative to crown)

A

Twice as long as the crown

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38
Q

Maxillary 1st molar: Roots

The lingual, MB and DB roots are splayed:

A

Wider than the crown width

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39
Q

Maxillary 1st molar: Roots

List the roots longest to shortest:

A

L> MB> DB

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40
Q

Maxillary 1st molar: Roots

How many canals are present in each of the roots?

A

MB: 2 canals (90-95% of cases)
DB: 1 canal
Lingual: 1 canal

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41
Q

Label the following transverse section of the maxillary 1st molar roots:

A

Left: DB
Middle: Lingual
Right: MB

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42
Q

Maxillary 1st molar: lingual

From this view what cusps are visible?

A

ML and DL cusps

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43
Q

Maxillary 1st molar: lingual

The ML and DL cusps are separated by a:

A

Lingual groove

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44
Q

Maxillary 1st molar: lingual

ML and DL cusps are separated by a lingual that ends in the:

A

Middle lingual surface

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45
Q

Maxillary 1st molar: lingual

What is blue line depicting?

A

Lingual groove

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46
Q

Maxillary 1st molar: lingual

ML cusp= ____ width of tooth

A

3/5 mesiodistal

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47
Q

Maxillary 1st molar: lingual

ML cusp is ____ & _____ compared to the DL cusp

A

Broader and longest

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48
Q

Maxillary 1st molar: lingual

ML cusp contains:

A

Cusp of carabelli (5th cusp)

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49
Q

Maxillary 1st molar: lingual

The DL cusp is (funny silly goofy word)

A

Spheroidal

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50
Q

The fifth cusp located on the maxillary 1st molar:

A

Cusp of carabelli

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51
Q

What view allows you to see the cusp of carabelli?

A

Lingual view

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52
Q

This green line is showing _____, while the blue line is showing _____.

A

Cusp of carabelli

Lingual groove

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53
Q

Maxillary 1st molar: lingual

How many roots are visible? Which root is the longest?

A

3 roots visible; lingual longest

54
Q

Maxillary 1st molar: lingual

What root is in line with the lingual groove?

A

Lingual groove

55
Q

Maxillary 1st molar: lingual

What is present on the lingual spect from the terminus of the lingual groove extending to the middle 1/3 of the root?

A

Shallow depression

56
Q

Maxillary 1st molar: mesial

What is the geometrical outline from this view?

A

Trapezoidal

57
Q

Maxillary 1st molar: mesial

From this view, the tooth converges:

A

Occlusally

58
Q

Maxillary 1st molar: mesial

From this view, the tooth converges occlusally with the maximum BL width at the:

A

Cervix

59
Q

Maxillary 1st molar: mesial

What cusps are visible from this view?

A

MB and ML (+ cusp of carabelli)

60
Q

What view of the maxillary first molar is this?

A

Mesial view

61
Q

Maxillary 1st molar: mesial

From this view, what is the:
Buccal height of contour?
Lingual height of contour?
Mesial contact area?

A

Buccal height of contour: cervical 1/3
Lingual height of contour: middle 1/3
Mesial contact area: middle 1/3 offset to buccal

62
Q

Maxillary 1st molar: mesial

What roots are visible from this view? What root is covered?

A

MB and lingual root (DB root is hidden by the MB root)

63
Q

Maxillary 1st molar: mesial

From this view, where do we see the level of bifurcation?

A

3mm apical to CEJ

64
Q

Maxillary 1st molar: mesial

From this view what root do we describe as banana shaped? And why’s?

A

Lingual root and narrow BL and 50% of time curves bucally

65
Q

Maxillary 1st molar: distal

Crown constricts toward the:

A

Distal

66
Q

Maxillary 1st molar: distal

Since the crown constricts toward the distal, the ___ aspect is visible from the distal

A

Buccal

67
Q

Maxillary 1st molar: distal

What cusps are visible?

A

4 major cusps

68
Q

Maxillary 1st molar: distal

How many roots are visible from this view?

A

3 roots

69
Q

Maxillary 1st molar: distal

The bifurcation is about:

A

5mm apical to CEJ

70
Q

Maxillary 1st molar: distal

The distal contact area is in the:

A

Middle 1/3 and offset bucally

71
Q

Maxillary 1st molar: distal

What anatomical feature is present in the cervical area

A

DB concavity

72
Q

Maxillary 1st molar: occlusal

What is the geometric outline?

A

Rhomboidal

73
Q

Maxillary 1st molar: occlusal

For the rhomboidal geometric outline, what contributes to the acute angles? What contributes to the obtuse angles?

A

Acute angles= MB and DL

Obtuse angles= ML and DB

74
Q

Maxillary 1st molar: occlusal

The crown us wider ____ than _____.

A

Buccolingually than mesiodistally

75
Q

Maxillary 1st molar: occlusal

The _____ aspect is greater than the _____ aspect

A

Mesial aspect> distal aspect

76
Q

The maxillary 1st molar is the only tooth which broadens:

A

Toward the lingual

77
Q

On the maxillary 1st molar, describe the MD width both lingually and bucally

A

MD width greater on the lingual side than on the buccal side

78
Q

Label the lingual and buccal sides of this image

A

Top: buccal
Bottom: lingual

79
Q

Maxillary 1st molar: occlusal

Rank the cusps in order of largest to smallest:

A

ML cusp (largest)> MB> DB> DL> 5th cusp

80
Q

Maxillary 1st molar: occlusal

ML, MB and DB cusps form the:

A

Primary molar triangle (trigon)

81
Q

Maxillary 1st molar: occlusal

What forms the trigon?

A

ML, MB, DB cusps

82
Q

Distal cusp ridge of the ML cusp and the triangular ridge of the DB cusp form the:

A

Oblique ridge

83
Q

Maxillary 1st molar: occlusal

What are the two major fossa present?

A

Central fossa & distal fossa

84
Q

Maxillary 1st molar: occlusal

Fossa that lies in the center of the trigon mesial to the oblique ridge, and roughly triangular

A

Central fossa

85
Q

Maxillary 1st molar: occlusal

The central fossa lies in the center of the trigon _____ to the _____

A

Mesial to the oblique ridge

86
Q

Maxillary 1st molar: occlusal

Fossa that is distal to the oblique ridge; roughly linear

A

Distal fossa

87
Q

Maxillary 1st molar: occlusal

The distal fossa is ____ to the ____ ridge

A

Distal to the oblique ridge

88
Q

Maxillary 1st molar: occlusal

In addition to the two major fossae, ____ minor are also present

A

2

89
Q

Maxillary 1st molar: occlusal

The 2 minor fossa include:

A

Mesial triangular fossa and distal triangular fossa

90
Q

Label all 4 of the occlusal fossa of the maxillary 1st molar and categorize as major or minor:

A

Left blue: distal triangular fossa (minor)
Right blue: mesial triangular fossa (minor)
Center red: central fossa (major)
Red oval: distal fossa (major)

91
Q

Maxillary 1st molar: occlusal

At junction of the central developmental groove, buccal groove, & transverse groove of the oblique ridge

A

Central pit

92
Q

Maxillary 1st molar: occlusal

The central pit is located at the junction of:

A

Central developmental groove, buccal groove, & transverse groove of the oblique ridge

93
Q

Maxillary 1st molar: occlusal

At junction of the distal oblique groove and lingual groove

A

Distal pit

94
Q

Maxillary 1st molar: occlusal

The distal pit is at the junction of:

A

Distal oblique groove and lingual groove

95
Q

Maxillary 1st molar:

When root divides into 3 roots:

A

Trifurcation

96
Q

Maxillary 1st molar: root

Name each level of furcation and which is the greatest:

A

Mesial, buccal and distal (distal greatest)

97
Q

Maxillary 1st molar:

Proximal contacts
Mesial at:
Distal at:

Heights of contour
Buccal:
Lingual:

A

Mesial @ middle 1/3 offset to buccal
Distal @ middle 1/3 offset to buccal

Buccal @ cervical 1/3
Lingual @ middle 1/3

98
Q

Label the views of this tooth; and what tooth is this?

A

Maxillary 1st molar:

Top left: buccal
Top right: lingual
Bottom left: mesial
Bottom right: distal
Middle: occlusal

99
Q

Maxillary 2nd molars:

Compared to the maxillary 1st molar, the crown is:

A

Smaller, shorter, more rhomboidal

100
Q

Maxillary 2nd molars:

How many occlusal types? What are the names? What are the most common?

A

2 occlusal types: rhomboidal and heart shaped, and the rhomboidal is most common

101
Q

Maxillary 2nd molars:

The rhomboidal occlusal type resembles the ____ molars while the heart shaped occlusal type resembles the ____ molars.

A

1st; 3rd

102
Q

Maxillary 2nd molars:

Compared to the maxillary 1st molar, the DL cusp on the maxillary 2nd is ____.

A

Smaller

103
Q

Maxillary 2nd molars: What cusp is not present on this tooth when compared to maxillary 1st molar?

A

Cusp of carabelli

104
Q

Maxillary 2nd molars:

Compared to the maxillary 1st molar, the crown is:

A

Shorter

105
Q

Maxillary 2nd molars:

Compared to the maxillary 1st molar, the roots are ____ and are more _____.

A

As long or longer; more distally inclined

106
Q

What tooth is shown? Label each view:

A

Maxillary 2nd molar
Top left: buccal
Top right: lingual
Bottom left: mesial
Bottom right: distal
Middle: occlusal

107
Q

Maxillary 2nd molars: compared to the maxillary first molar, from the buccal view:

  1. Crown is ______ and narrower ____
  2. The DB cusp is ____
  3. The roots are more _____.
  4. The roots are more incline to _____.
  5. The MB root apex is in line with ____.
A
  1. Shorter and narrower MD
  2. Smaller
  3. Parallel
  4. Distal
  5. Buccal groove
108
Q

Maxillary 2nd molars: lingual

The DL cusp is _____ compared to the maxillary 1st molar

A

Smaller

109
Q

Maxillary 2nd molars: lingual

The lingual root is ______ MD

A

Narrower

110
Q

Maxillary 2nd molars: lingual

The lingual root is _____ inclination

A

Distal

111
Q

In the maxillary second molar, the apex of the root lines up with the _____ while in the maxillary 1st molar, the apex of the root lines up with the _____.

A

DL cusp tip; lingual groove

112
Q

Maxillary 2nd molars: lingual

What cusp is not present?

A

Cusp of carabelli

113
Q

Maxillary 2nd molars: mesial

This view is similar to the maxillary 1st molar but the crown height is _____.

A

Shorter

114
Q

Maxillary 2nd molars: mesial

The BL width is ____ Compared to the maxillary 1st molar

A

The same

115
Q

Maxillary 2nd molars: mesial

The roots do not diverge as much meaning they are:

A

Confined within the crown width

116
Q

Maxillary 2nd molars: mesial

The contact area is:

A

In middle 1/3 offset to buccal

117
Q

Maxillary 2nd molars: distal

The crown converges toward:

A

Distal

118
Q

Maxillary 2nd molars: distal

Compared to the maxillary 1st molar, the DB and DL cusps are:

A

smaller

119
Q

Maxillary 2nd molars: distal

From this view why is more of the occlusal surface and ML cusp visible (compared to max 1st molar)?

A

Because the DB and DL cusps are smaller

120
Q

Maxillary 2nd molars: distal

The distal contact area is in :

A

Middle 1/3 offset buccally

121
Q

Maxillary 2nd molars: distal

How many roots are visible from this view?

A

All 3 roots

122
Q

Maxillary 2nd molars: occlusal

The geometrical outline is more ____ compared to the maxillary 1st molar?

A

Rhomboidal

123
Q

Maxillary 2nd molars: occlusal

Compared to the maxillary 1st molar the _____ dimension is similar while the _____ dimension is smaller

A

BL; MD

124
Q

Maxillary 2nd molars: occlusal

Compared to the maxillary 1st molar, the DB and DL cusps are:

A

Less developed

125
Q

Maxillary 2nd molars: occlusal

The tooth constricts toward the _____ and converges toward the ____.

A

Distal; lingual

126
Q

Maxillary 2nd molars: occlusal

Compared to the maxillary 1st molar, this tooth shows a more variable ____ & ____ anatomy

A

Pit and groove

127
Q

Maxillary 2nd molars: occlusal

Some maxillary 2nd molars have no _____ & resulting in a _____ shape

A

DL cusp; heart

128
Q

Maxillary 2nd molars: roots

Most of the time how many times are canals are present in the following roots?

MB:
DB:
Lingual:

A

MB: 1 most of the time
DB: 1
Lingual: 1

129
Q

Name the cross section of these roots, what tooth this for?

A

Maxillary 2nd molar

Left: DB
Middle: Lingual
Right: MB

130
Q

Maxillary 2nd molars:

Proximal contacts
Mesial:
Distal:

Height of contour
Buccal:
Lingual:

A

Mesial: middle 1/3 offset to the buccal
Distal: middle 1/3 offset to the buccal

Buccal: cervical 1/3
Lingual: middle 1/3

Dental Morphology (11 decks)

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