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Dental Morphology > Mandibular Molars > Flashcards

Mandibular Molars Flashcards

1
Q

The mandibular molars are considered the:

A

Largest mandibular teeth

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2
Q

In the mandibular 1st molar there are generally ___ cusps, while in the mandibular 2nd molar there are generally ____ cusps.

A

5 cusps; 4 cusps

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3
Q

Mandibular molars are broader ____ than _____.

A

MD than BL

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4
Q

The mandibular molars are broader ______ while the maxillary molars are broader _____.

A

MD; FL

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5
Q

The mandibular 1st molar: How many cusps are there? Name them

A

5 cusps- 3 buccal 2 lingual

Mesiobuccal, distobuccal & distal (buccal)

Mesiolingual & distolingual (lingual)

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6
Q

The mandibular 1st molar How many roots are present? Name them

A

2 roots- mesial root & distal root

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7
Q

The 2 roots of the mandibular 1st molar are broad:

A

BL

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8
Q

The mesial root of the mandibular 1st molar curves ___ while the distal root is pointed in a ____ direction

A

Distally; distal direction

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9
Q

The mandibular 1st molar: Buccal Aspect:

Geometric outline:

A

Trapezoidal

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10
Q

The mandibular 1st molar: Buccal Aspect:

How many cusps are visible from this view?

A

All 5 cusps

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11
Q

The mandibular 1st molar: Buccal Aspect:

List the order biggest to smallest of the buccal cusps

A

MB> DB> distal cusp

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12
Q

The mandibular 1st molar: Buccal Aspect:

How many grooves can be seen from this aspect? Name them:

A

2 grooves- MB developmental groove & DB developmental groove

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13
Q

The mandibular 1st molar: Buccal Aspect:

The MB developmental groove is ___ compared to the DB developmental groove:

A

Shorter

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14
Q

The mandibular 1st molar: Buccal Aspect:

The MB developmental groove terminates in the:
The DB developmental groove terminates in the:

A

Middle 1/3 of tooth

cervical 1/3 of tooth

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15
Q

The mandibular 1st molar: Buccal Aspect:

The cervical line curves:

A

Apically

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16
Q

The mandibular 1st molar: Buccal Aspect:

The mesial height of contour:

A

Middle 1/3

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17
Q

The mandibular 1st molar: Buccal Aspect:

Describe the mesial outline:

A

Convex and concave

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18
Q

The mandibular 1st molar: Buccal Aspect:

Describe distal height of contour:

A

Middle 1/3 on distal aspect of distal cusp

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19
Q

The mandibular 1st molar: Buccal Aspect:

Describe the distal outline:

A

Convex and straight

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20
Q

What view of the mandibular 1st molar is this? Label the grooves

A

Buccal view

A: DB developmental groove
B: MB developmental groove

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21
Q

The mandibular 1st molar: Buccal Aspect: Roots

Name the 2 roots:

A

Mesial and distal

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22
Q

The mandibular 1st molar: Buccal Aspect: roots

The mesial root is ____ and curves ____ to a ______

A

Straight; distally; tapered apex

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23
Q

The mandibular 1st molar: Buccal Aspect: Roots

The distal root points ____ to a _____

A

Points distally to a more tapered apex

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24
Q

The mandibular 1st molar: Buccal Aspect:
The roots are ____ on the buccal than on the lingual

A

Wider MD

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25
Q

The mandibular 1st molar: Buccal Aspect: Roots

Are there developmental depressions on the roots? If so where at?

A

Developmental depressions on the mesial and distal aspects of each root

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26
Q

The mandibular 1st molar: Buccal Aspect: roots

There developmental depression buccally on the:

A

Root trunk from CEJ to furcation

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27
Q

The mandibular 1st molar: Lingual Aspect:

From this aspect how many cusps are visible? Name them

A

3 visible cusps; ML, DL, and Distal

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28
Q

The mandibular 1st molar: Lingual Aspect:

Describe the sizes of the ML and DL cusps in relation to one another

A

ML is larger (wider and taller)

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29
Q

The mandibular 1st molar: Lingual Aspect:

What anatomical feature can we see from this aspect?

A

Lingual developmental groove

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30
Q

The mandibular 1st molar: Lingual Aspect:

Mesial and distal aspects of the crown are visible from the lingual aspect due to the:

A

Lingual convergence

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31
Q

The mandibular 1st molar: Lingual Aspect:

How many roots can se see from this aspect?

A

2

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32
Q

The mandibular 1st molar: Lingual Aspect:

The roots measure longer on the ____ than ___

A

Lingual than buccal

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33
Q

The mandibular 1st molar: Lingual Aspect:

The bifurcation is in line with:

A

Lingual developmental groove

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34
Q

The mandibular 1st molar: Mesial aspect:

What is the geometric outline:

A

Rhomboidal

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35
Q

The mandibular 1st molar: Mesial aspect:

What cusps are visible from this aspect?

A

2 cusps- MB and ML

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36
Q

The mandibular 1st molar: Mesial aspect:

How many roots are visible form this aspect?

A

1 root- mesial root

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37
Q

The mandibular 1st molar: Mesial aspect:

Describe the buccal height of contour:

A

In cervical 1/3 (buccal cervical ridge)

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38
Q

The mandibular 1st molar: Mesial aspect:

What is another name for the buccal height of contour (specific to this tooth)

A

Buccal cervical ridge

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39
Q

This blue dot shows what anatomical feature?

A

Buccal cervical ridge

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40
Q

The mandibular 1st molar: Mesial aspect:

An interesting fact about this tooth is that:

A

The crown has a lingual tilt to the root axis

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41
Q

When a crown has a lingual tile to the root axis, this is characteristic of:

A

Mandibular molars and mandibular premolars

42
Q

The mandibular 1st molar: Mesial aspect:

The lingual height of contour is:

A

In middle 1/3

43
Q

The mandibular 1st molar: Mesial aspect:

The cervical line curves:

A

Occlusally

44
Q

The mandibular 1st molar: Mesial aspect:

The cervical line is higher ____ than ____

A

Lingually than buccally

45
Q

The mandibular 1st molar: Mesial aspect:

The root apex lies:

A

Under MB cusp

46
Q

The mandibular 1st molar: Mesial aspect:

What can be seen on the root?

A

A slight mesial developmental depression

47
Q

The mandibular 1st molar: Distal aspect:

Describe the visibility from this aspect compared to the mesial aspect:

A

More tooth is visible

48
Q

The mandibular 1st molar: Distal aspect:

What cusp is visible from this aspect?

A

DB cusp

49
Q

The mandibular 1st molar: Distal aspect:

How many roots are visible from this aspect

A

2

50
Q

The mandibular 1st molar: Distal aspect:

The distal marginal ridge is ___ & dips _____

A

Shorter and dips cervically

51
Q

The mandibular 1st molar: Distal aspect:

What groove is visible from this aspect?

A

DB developmental groove

52
Q

The mandibular 1st molar: Distal aspect:

From this aspect, the DB developmental groove is visible and end on ____ at the ____

A

Distal surface at the distobuccal line angle

53
Q

What groove is seen and what aspect is this?

A

Distal aspect, DB developmental groove

54
Q

The mandibular 1st molar: occlusal aspect:

Geometric shape of this aspect?

A

Hexagonal

55
Q

The mandibular 1st molar: occlusal aspect:

From this aspect, the width of the crown is greater ____ than ____

A

MD than BL

56
Q

The mandibular 1st molar: occlusal aspect:

In MD terms, the crown is wider _____ and tapers ____

A

Mesially; distally

57
Q

The mandibular 1st molar: occlusal aspect:

In BL terms, the crown is wider _____ and tapers _____

A

Buccally; lingually

58
Q

Label the sides of this image from the occlusal view of the mandibular 1st molar:

A

Left: mesial
Right: distal
Top: buccal
Bottom: lingual

59
Q

The mandibular 1st molar: occlusal aspect:

Rank the cusps based on size from largest to smallest:

A

MB> ML >=DL>DB>D

60
Q

The mandibular 1st molar: occlusal aspect:

Aside from the occlusal surface, what other surface is mostly visible from this aspect?

A

Buccal surface

61
Q

The mandibular 1st molar: occlusal aspect:

How many major fossa are seen? What are the names?

A

1 major fossa, central fossil

62
Q

The mandibular 1st molar: occlusal aspect:

Describe the central fossa

A

Circular & centrally placed between cusp ridges

63
Q

The mandibular 1st molar: occlusal aspect:

How many minor fossa are present? Specify the names:

A

2 minor fossa: mesial triangular and distal triangular fossa

64
Q

The mandibular 1st molar: occlusal aspect:

List the developmental groove visible from this aspect:

A

Central developmental groove, mesiobuccal developmental groove, distobuccal developmental groove and lingual developmental groove

65
Q

Label the grooves:

A

Yellow: MB developmental groove
Orange: central developmental groove
Red: DB developmental groove
Brown: lingual developmental groove

66
Q

The mandibular 1st molar: occlusal aspect:

What are the boundaries of the central fossa: (6)

A
  1. Distal slope of MB cusp
  2. Mesial and distal slopes of DB cusps
  3. Mesial slope of distal cusp
  4. Distal slope of ML cusp
  5. Mesial slope of DL cusp
  6. Triangular ridges of the MB, D, DL and ML cusps
67
Q

Grooves on the mandibular first molar:

Buccal:
Lingual:
Mesial:
Distal:

A

Buccal- DB and MB developmental grooves
Lingual: Lingual developmental groove
Mesial: none
Distal: DB developmental groove

68
Q

The mandibular 2nd molar compared to the mandibular first, the size of the mandibular second molar is:

A

smaller

69
Q

The mandibular 2nd molar: How many cusps are present? Name them:

A

4 cusps: MB, ML, DB, DL (no 5th distal cusp)

70
Q

What is the 5th additional cusp that is present on the mandibular 1st molar but not the second?

A

Distal cusp

71
Q

The mandibular 2nd molar: How many roots? Name them:

A

2 roots: mesial and distal roots

72
Q

The mandibular 2nd molar: buccal aspect: compared to the 1st mandibular molar this tooth appears:

A

Shorter and narrower

73
Q

The mandibular 2nd molar: buccal aspect: How many cusps are visible?

A

All 4 cusps- ML, MB, DL, DB

74
Q

The mandibular 2nd molar: buccal aspect: What separates the 2 buccal cusps?

A

Buccal developmental groove

75
Q

The mandibular 2nd molar: buccal aspect: The buccal developmental groove separates what 2 cusps

A

MB and DB cusps

76
Q

The mandibular 2nd molar: buccal aspect: The mesial and distal contacts:

A

Middle 1/3

77
Q

The mandibular 2nd molar: buccal aspect: The cervical line points toward:

A

Bifurcation

78
Q

The mandibular 2nd molar: buccal aspect: compared to the mandibular 1st molar, the roots are:

A

Shorter, closer and more parallel

79
Q

The mandibular 2nd molar: buccal aspect: compared to the mandibular 1st molar, the roots are more:

A

More inclined distally

80
Q

The mandibular 2nd molar: lingual aspect: the converges toward the lingual but:

A

Less than the mandibular 1st molar

81
Q

The mandibular 2nd molar: mesial aspect: compared to the mandibular 1st molar the buccal curvature and buccal cervical ridge is:

A

Less pronounced

82
Q

The mandibular 2nd molar: mesial aspect: compared to the mandibular 1st molar, the cervical line is:

A

Less curved

83
Q

The mandibular 2nd molar: mesial aspect: compared to the mandibular 1st molar, the mesial root is:

A

More pointed at apex

84
Q

The mandibular 2nd molar: distal aspect: what is absent in this tooth compared to the mandibular 1st molar?

A

Distal cusp

85
Q

The mandibular 2nd molar: distal aspect: describe the distal contact:

A

Centered BL and the contact is in the middle 1/3 occlusocervically

86
Q

The mandibular 2nd molar: occlusal aspect: what is the geometric outline?

A

Rectangular in shape

87
Q

The mandibular 2nd molar: occlusal aspect- compared to the mandibular 1st, what cusp is more prominent?

A

DB cusp

88
Q

The mandibular 2nd molar: occlusal aspect: compare the 4 cusps from this view:

A

Relatively equal in size

89
Q

The mandibular 2nd molar: occlusal aspect

What groove are present?

A

Central groove, lingual groove, buccal groove (no DB groove)

90
Q

The mandibular 2nd molar: occlusal aspect- what shape do the occlusal grooves form?

A

Cross

91
Q

The mandibular 2nd molar: occlusal aspect: the overall appearance of the occlusal surface is ____ due to ____

A

More wrinkly due to more supplemental grooves

92
Q

The mandibular 1st molar developed from ____ lobes while the mandibular 2nd molar develops from _____ lobes

A

5; 4

93
Q

Both the maxillary and mandibular 3rd molars are considered:

A

The most variable teeth in the mouth

94
Q

The mandibular 3rd molars are usually similar to:

A

The other mandibular molars

95
Q

Mandibular 3rd molars: list the anomalies often seen:

A

Oversized crowns

96
Q

Maxillary 3rd molars: list the anomalies commonly seen:

A

Undersized crowns

97
Q

Which molars are commonly impacted?

A

Mandibular 3rd

98
Q

Mandibular 3rd molars: from the buccal view, how many cusps and how many roots are seen?

A

2 cusps; 2 roots

99
Q

Mandibular 3rd molars: from the lingual aspect are:

A

Similar to 1st and 2nd mandibular molars

100
Q

Mandibular 3rd molars: from a mesial view: the root is:

A

Shorter and more tapered

101
Q

Mandibular 3rd molars: from a distal view:

A

Similar to mesial but narrower

102
Q

Mandibular 3rd molars: from an occlusal view, compared to the other mandibular molars they look:

A

More rounded

Dental Morphology (11 decks)

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