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Dental Morphology > Maxillary Molars > Flashcards

Maxillary Molars Flashcards

1
Q

How many roots are present on the maxillary molars?

A

Three roots

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2
Q

What are the roots present on the maxillary molars?

A

Two buccal, one lingual

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3
Q

In maxillary molars what root is the largest?

A

The one lingual

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4
Q

Label the views of these maxillary molars:

A

Buccal; lingual

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5
Q

The maxillary second molar has ____ cusps, while the maxillary first molar has ____ cusps

A

Four, five

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6
Q

What cusp is the largest in maxillary molars

A

Mesiolingual

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7
Q

What are the four cusps of the maxillary second molar:

A

Distobuccal
Distolingual
Mesiobuccal
Mesiolingual

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8
Q

In maxillary molars what cusps form a trigon or primary cusp triangle:

A

Mesiolingual
Mesiobuccal
Distobuccal

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9
Q

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

A

Trigon/ primary cusp triangle

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10
Q

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

A

Distolingual
Decreases

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11
Q

In maxillary molars, the crowns are broader ____ than ____

A

Buccolingually than mesiodistally

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12
Q

In maxillary molars, the crowns are relatively short:

A

Occlusion-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

The DB cusp connected to the ML cusp

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15
Q

The distal cusp ridge of the mesiolingual cusp, & the triangular ridge of the distobuccal 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 mesiolingual cusp & the triangular ridge of the distobuccal cusp

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17
Q

Label the following views of the maxillary first molar:

A

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

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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 four major cusps

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20
Q

Maxillary 1st molar: Buccal

The distal profile is:
The mesial profile is:

A

Convex
Convex & flat

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21
Q

What view is this from? Where is mesial & where is distal:

A

Buccal view

Left- distal
Right- mesial

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22
Q

Maxillary 1st molar: Buccal

Compare the MB & DB cusps:

A

MB cusp is larger & DB cusp is more pointed

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23
Q

Maxillary 1st molar: Buccal

MB & 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 & DB cusps

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25
Q

Maxillary 1st molar: Buccal

Where are the mesial & distal contacts located?

A

Both in 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

Maxillary 1st molar

What does the blue line represent? What view is this from?

A

Buccal developmental groove
Buccal aspect

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28
Q

Maxillary 1st molar: Buccal

An interesting fact regarding the maxillary 1st molar is that there is often a concavity present at the:

A

Cervical area on the distal surface of the 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

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

A

1- can complicate 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

Three

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32
Q

Maxillary 1st molar: Buccal

Root that is straight, curves distally & apex is in line with the 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 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

2x as long as the crown

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38
Q

Maxillary 1st Molar: roots

The lingual, MB, & 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: two canals (90-95% of cases)
DB: 1 canal
Lingual: 1 canal

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41
Q

Label the following transverse sections 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 & DL cusps

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43
Q

Maxillary 1st Molar: Lingual

The Mesiolingual & distolingual cusps are separated by a:

A

Lingual groove

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44
Q

Maxillary 1st Molar: Lingual

The ML & DL cusps are separated by a lingual groove that ends in the:

A

Middle of the lingual surface

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45
Q

Maxillary 1st Molar: Lingual

What is this blue line depicting:

A

Lingual groove

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46
Q

Maxillary 1st Molar: Lingual

The ML cusp = ____ width of tooth

A

3/5 mesiodistal

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47
Q

Maxillary 1st Molar: Lingual

The ML cusp is _______ & _____ compared to the DL cusp

A

Broader & longest

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48
Q

Maxillary 1st Molar: Lingual

The ML cusp contains:

A

Cusp of Carabelli (5th cusp)

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49
Q

Maxillary 1st Molar: Lingual

The DL cusp is:

A

Spheroidal

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50
Q

The fifth cusp located on the ML cusp of the maxillary first molar

A

Cusp of carabelli

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51
Q

What view allows you to see the cusp of carabelli?

A

Lingual view of the maxillary molar

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52
Q

The green line is showing ____ while the blue line is showing _____

A

Green- cusp of Carabelli
Blue- lingual groove

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53
Q

Maxillary 1st Molar: Lingual

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

A

Three roots visible; longest= lingual

54
Q

Maxillary 1st Molar: Lingual

What root is in line with the lingual groove?

A

Lingual root

55
Q

Maxillary 1st Molar: Lingual

What is present on the lingual aspect 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

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:

59
Q

Maxillary 1st Molar: Mesial

What cusps are visible from this view?

A

MB & ML (+cusp of carabelli)

60
Q

What view of the maxillary 1st 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

Visible- MB & Lingual root
DB root is hidden (by MB root)

63
Q

Maxillary 1st Molar: Mesial

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

A

3 mm apical to the CEJ

64
Q

Maxillary 1st Molar: Mesial

From this view, what root do we describe as banana shaped? Why?

A

Lingual root
Narrow BL & 50% of the time curves buccally

65
Q

Maxillary 1st Molar: Distal

The crown constricts towards the:

66
Q

Maxillary 1st Molar: Distal

Due to the crown constricting towards the distal the _____ aspect is visible

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

Three 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 are is in the:

A

Middle 1/3 & offset buccally

71
Q

Maxillary 1st Molar: Distal

What is 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 & DL
Obtuse angles: ML & DB

74
Q

Maxillary 1st Molar: Occlusal

The crown is 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 first molar is the only tooth which broadens:

A

Toward the lingual

77
Q

On the maxillary first molar, describe the MD width lingually & buccally

A

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

78
Q

Label the lingual & buccal sides of this image

A

Top- Buccal (narrower)
Bottom- Lingual (Wider)

79
Q

Maxillary 1st Molar: Occlusal

Rank the cusps in order of largest to smallest:

A

(Largest) ML > MB > DB > DL > Cusp of Carabelli

80
Q

Maxillary 1st Molar: Occlusal

The ML, MB & 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 & the triangular ridge of the DB cusp form the:

A

Oblique ridge

83
Q

Maxillary 1st Molar: Occlusal

What are the two major fossae present?

A

Central fossa & distal fossa

84
Q

Fossa that lies in the center of the trigon mesial to the oblique ridge & rougly 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; oblique

88
Q

Maxillary 1st Molar: Occlusal

In addition to the two major fossa, _____ minor fossa are also present

89
Q

Maxillary 1st Molar: Occlusal

The two minor fossa include:

A

Mesial triangular fossa
Distal triangular fossa

90
Q

Label all four of the occlusal fossa on the maxillary first molar & 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 central developmental groove, buccal groove, & transverse groove of 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 & lingual groove

A

Distal pit

94
Q

Maxillary 1st Molar: Occlusal

The distal pit is at the juntion of the:

A

Distal oblique groove & lingual groove

95
Q

When root divides into three roots

A

Trifuraction

96
Q

Maxillary first molar: root

Name each level of Furcation & which is the greatest:

A

Mesial, buccal, distal

Distal = greatest

97
Q

Maxillary 1st molar

Proximal contacts
Mesial:
Distal:

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 following views of this tooth; 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 first molar the crown is:

A

Smaller, shorter, more rhomboidal

100
Q

Maxillary 2nd molars:

How many occlusal types, name them & what is the most common:

A

2 occlusal types
Rhomboidal & Heart shaped
Rhomboidal= most common

101
Q

Maxillary 2nd molars:

The rhomboidal occlusal type resembles the _____ molars
The heart-shaped occlusal type resembles the _____ molars

A

1st molars
3rd molars

102
Q

Maxillary 2nd molars:

Compared to the maxillary 1st molar, the DL cusp on the maxillary second is:

103
Q

Maxillary 2nd molars:

What cusp is not present on this tooth when compared to the maxillary 1st molar

A

Cusp of Carabelli

104
Q

Maxillary 2nd molars:

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

105
Q

Maxillary 2nd molars:

Compared to the maxillary first molar, the roots are ____ & 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: Buccal

Compared to the maxillary first mole:

1- the crown is _____ & narrower _____
2- the DB cusp is _______
3- the roots are more _____
4- the roots are more inclined to the ______
5- the MB root apex is in line with _____

A

1- shorter; narrower MD
2- smaller
3- parallel
4- inclined to distal
5- buccal groove

108
Q

Maxillary 2nd molars: lingual

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

109
Q

Maxillary 2nd molars: lingual

The lingual root is _______ MD

110
Q

Maxillary 2nd molars: lingual

The lingual root is inclined ____

111
Q

In the maxillary 2nd 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 in this tooth

A

Cusp of carabelli

113
Q

Maxillary 2nd molars: Mesial

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

114
Q

Maxillary 2nd molars: Mesial

The BL width is _____ compared to the maxillary 1st molar

115
Q

Maxillary 2nd molars: Mesial

The roots do not diverge as much meaning that they are:

A

Confined within the crown width

116
Q

Maxillary 2nd molars: mesial

The contact area is in:

A

Middle 1/3 offset to buccal

117
Q

Maxillary 2nd molars: distal

The crown converges toward:

118
Q

Maxillary 2nd molars: distal

Compared to the maxillary first molar the DB & DL cusps are:

119
Q

Maxillary 2nd molars: distal

From this view, why is more of the occlusal surface & ML cusp visible (compared to maxillary 1st)

A

Because the DB & 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 visible from this view?

A

All three roots visible

122
Q

Maxillary 2nd molars: Occlusal

The geometrical outline is more _____ compared to the maxillary first

A

Rhomboidal

123
Q

Maxillary 2nd molars: Occlusal

Compared to the maxillary first the _____ dimension is similar while the _____ dimension is smaller

A

Buccolingual
Mesiodistal

124
Q

Maxillary 2nd molars: Occlusal

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

A

Less developed

125
Q

Maxillary 2nd molars: Occlusal

The tooth contracts towards the ______ & converges towards the ______

A

Distal
Lingual

126
Q

Maxillary 2nd molars: Occlusal

Compared to the maxillary 1st molar this tooth overall showed a more variable _____ & _____ anatomy

A

Pit & groove

127
Q

Maxillary 2nd molars: Occlusal

Some maxillary second molars have no _____ resulting in a ____ shape

A

DL cusp
Heart shaped

128
Q

Maxillary 2nd molars: Roots

Most of the time how 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 is this for?

A

Maxillary 2nd molar

Left: DB
Middle: lingual
Right: MB

130
Q

Maxillary 2nd molar:

Proximal contacts
Mesial:
Distal:

Height 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

Dental Morphology (11 decks)

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