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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 first mandibular molar there are generally _____ cusps, while in the second mandibular molar there are generally _____ cups

A

5, 4

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3
Q

Mandibular molars are broader ____ than ____

A

MD, 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

Mandibular first molar:

How many cusps are there? Name the cusps:

A

Five cusps- 3 buccal, 2 lingual

Mesiobuccal, distobuccal & distal (buccal cusps)
Mesiolingual & distolingual (lingual cusps)

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6
Q

Mandibular first molar:

How many roots, name the roots

A

Two roots
Mesial root, distal root

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7
Q

The two roots of the Mandibular first molar are broad:

A

B-L

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8
Q

The mesial root of the Mandibular first molar curves _____ while the distal root is pointed in a ____ direction

A

Distally; distal direction

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9
Q

Mandibular 1st molar: Buccal aspect-

Geometric outline:

A

Trapezoidal

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10
Q

Mandibular 1st molar: Buccal aspect

How many cusps are visible from this view?

A

All five cusps

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11
Q

Mandibular 1st molar: Buccal aspect

List the order of sizes biggest to smallest of the buccal cusps

A

MB>DB>distal cusp

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12
Q

Mandibular 1st molar: Buccal aspect

How grooves can be seen from this aspect? Name them-

A

Two
Mesiobuccal developmental groove
Distobuccal developmental grocoe

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13
Q

Mandibular 1st molar: Buccal aspect

The mesiobuccal developmental groove is ____ compared to the distobuccal developmental groove

A

Shorter

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14
Q

Mandibular 1st molar: Buccal aspect

The MB developmental groove terminates in the:

The DB developmental groove terminates in the:

A

Middle third of tooth

Cervical third of tooth

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15
Q

Mandibular 1st molar: Buccal aspect

The cervical line curves:

A

Apically

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16
Q

Mandibular 1st molar: Buccal aspect

The mesial height of contour is in the:

A

Middle third

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17
Q

Mandibular 1st molar: Buccal aspect

Describe the mesial outline:

A

Convex & concave

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18
Q

Mandibular 1st molar: Buccal aspect

Describe the distal height of contour:

A

In the middle 1/3 on the distal aspect of the distal cusp

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19
Q

Mandibular 1st molar: Buccal aspect

Describe the distal outline:

A

Convex & straight

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20
Q

What view of the Mandibular 1st molar is this?

Label the grooves:

A

Buccal view (we can see all five cusps)

A- DB developmental groove
B- MB developmental groove

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21
Q

Mandibular 1st molar: Buccal Aspect- roots

Name the two roots visible:

A

Mesial & distal

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22
Q

Mandibular 1st molar: Buccal Aspect- roots

The mesial root is _____ & curves _____ to a ______

A

Straight; distally; tapered apex

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23
Q

Mandibular 1st molar: Buccal Aspect- roots

The distal root points _____ to a _____

A

Distally; more tapered apex

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24
Q

Mandibular 1st molar: Buccal Aspect- roots

The roots are ______ on the buccal than on the lingual

A

Wider MD

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25
Q

Mandibular 1st molar: Buccal Aspect- roots

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

A

Developmental depression on the mesial & distal aspects of each root

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26
Q

Mandibular 1st molar: Buccal Aspect- roots

There is a developmental depression buccally on the:

A

Root trunk from CEJ to furcation

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27
Q

Mandibular 1st molar: Lingual aspect

From this aspect, how many cusps are visible?
Name them-

A

Three cusps visible- ML, DL, Distal

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28
Q

Mandibular 1st molar: Lingual aspect

Describe the sizes of the mesiolingual & distolingual cusp in relation to one another:

A

ML is larger- wider & taller

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29
Q

Mandibular 1st molar: Lingual aspect

What anatomical feature can we see from this aspect?

A

Lingual developmental groove

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30
Q

Mandibular 1st molar: Lingual aspect

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

A

Lingual convergence

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31
Q

Mandibular 1st molar: Lingual aspect

How many roots can we see from this aspect?

A

Two

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32
Q

Mandibular 1st molar: Lingual aspect

The roots measure longer on the _____ than the ____

A

Lingual; buccal

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33
Q

Mandibular 1st molar: Lingual aspect

The bifurcation is in line with:

A

Lingual developmental groove

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34
Q

Mandibular 1st molar: Mesial aspect:

What is the geometric outline-

A

Rhomboidal

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35
Q

Mandibular 1st molar: Lingual aspect

What cusps are visible from this aspect?

A

MB & ML

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36
Q

Mandibular 1st molar: Lingual aspect

How many roots are visible from this aspect?

A

One root- mesial root

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37
Q

Mandibular 1st molar: Lingual aspect

Describe the buccal height of contour:

A

In cervical 1/3 (buccal cervical ridge)

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38
Q

Mandibular 1st molar: Lingual 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

What is the name of the anatomical feature represented by the blue dot on the mandibular 1st molar:

A

Buccal cervical ridge

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40
Q

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 tilt to the root axis, this is characteristic of-

A

Mandibular molars & mandibular premolars

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42
Q

Mandibular 1st molar: Mesial aspect

The lingual height of contour is:

A

In middle 1/3

43
Q

Mandibular 1st molar: Mesial aspect

The cervical line curves:

A

Occlusally

44
Q

Mandibular 1st molar: Mesial aspect

The cervical line is higher _____ than ______

A

Lingually than buccally

45
Q

Mandibular 1st molar: Mesial aspect

The root apex lies:

A

Under MB cusp

46
Q

Mandibular 1st molar: Mesial aspect

What can be seen on the root?

A

Slight mesial developmental depression

47
Q

Mandibular 1st molar: Distal aspect

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

A

More tooth visible

48
Q

Mandibular 1st molar: Distal aspect

What cusp is visible from this aspect?

49
Q

Mandibular 1st molar: Distal aspect

How many roots are visible from this aspect?

50
Q

Mandibular 1st molar: Distal aspect

The distal marginal ridge is ____ & dips _____

A

Shorter; dips cervically

51
Q

Mandibular 1st molar: Distal aspect

What groove is visible from this aspect?

A

DB developmental groove

52
Q

Mandibular 1st molar: Distal aspect

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

A

The distal surface at the distobuccal line angle

53
Q

What groove is seen & what aspect is this?

A

Distal aspect- distobuccal developmental groove

54
Q

Mandibular 1st molar: Occlusal aspect

Geometric shape:

55
Q

Mandibular 1st molar: Occlusal aspect

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

A

MD than BL

56
Q

Mandibular 1st molar: Occlusal aspect

(In terms of MD) The crown is wider _____ & tapers _____

A

Mesially; distally

57
Q

Mandibular 1st molar: Occlusal aspect

(In terms of BL) The crown is wider _____ & tapers ____

A

Buccally; lingually

58
Q

Label each side from this occlusal view of the Mandibular 1st molar:

A

A- mesial
B- buccal
C- distal
D- lingual

59
Q

Mandibular 1st molar: Occlusal aspect

Rank the cusp based size from largest to smallest:

A

MB > ML >= DL > DB > D

60
Q

Mandibular 1st molar: Occlusal aspect

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

A

Buccal surface

61
Q

Mandibular 1st molar: Occlusal aspect

How many major fossa- specify the name(s)

A

1 major fossa- central fossa

62
Q

Mandibular 1st molar: Occlusal aspect

Describe the central fossa

A

Major fossa, circular & centrally placed between cusp ridges

63
Q

Mandibular 1st molar: Occlusal aspect

How many minor fossa are present - specific the name(s)

A

2 minor fossa- mesial triangular fossa, distal triangular fossa

64
Q

Mandibular 1st molar: Occlusal aspect

List the developmental grooves visible from this aspect:

A

Central developmental groove
Mesiobuccal developmental groove
Distobuccal developmental groove
Lingual developmental groove

65
Q

Label the following of the Mandibular 1st molar:

A

Purple- mesiobuccal developmental groove
Green- distobuccal developmental groove
Pink- central developmental groove
Blue- lingual developmental groove

66
Q

Mandibular 1st molar: Occlusal aspect

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

A

1- distal slope of MB cusp
2- Mesial & distal slopes of DB cusp
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, ML cusps

67
Q

Groove on the mandibular 1st molar:

Buccal-
Lingual-
Mesial-
Distal-

A

Buccal- DB & MB developmental grooves
Lingual- lingual developmental groove
Mesial- none
Distal- DB developmental groove

68
Q

Mandibular 2nd molar:

Compared to the mandibular first, the size of the Mandibular 2nd molar:

69
Q

Mandibular 2nd molar:

How many cusps are present, name them:

A

4 cusps
MB cusp
ML cusp
DB cusp
DL cusp
(No fifth distal cusp)

70
Q

What is the fifth additional cusp present on the mandibular first molar, but not the second?

A

Distal cusp

71
Q

Mandibular 2nd molar:

Number of roots- name them:

A

Mesial & distal roots

72
Q

Mandibular 2nd molar: buccal aspect:

Compared to the mandibular 1st molar, this tooth appears:

A

Shorter & narrower

73
Q

Mandibular 2nd molar: Buccal aspect

How many cusps are visible-

A

All four- MB, DB, ML, DL

74
Q

Mandibular 2nd molar: Buccal aspect

What separates the two buccal cusps

A

Buccal developmental groove

75
Q

Mandibular 2nd molar: Buccal aspect

The buccal developmental groove separates what two cusps?

76
Q

Mandibular 2nd molar: Buccal aspect

The mesial & distal contact are in the:

A

Middle 1/3

77
Q

Mandibular 2nd molar: Buccal aspect

The cervical line points towards:

A

Bifurcation

78
Q

Mandibular 2nd molar: Buccal aspect

Compared to the mandibular 1st molar, the roots are:

A

Shorter, closer & more parallel

79
Q

Mandibular 2nd molar: Buccal aspect

Compared to the mandibular 1st molar, the roots are more:

A

Inclined distally

80
Q

Mandibular 2nd molar: Lingual aspect

The crown converges toward the ____

81
Q

Describe the lingual convergence between the mandibular 1st & 2nd molars:

A

The crown converges lingually more in the 1st molar

82
Q

Mandibular 2nd molar: Mesial aspect

Compared to the mandibular first molar: the buccal curvature & buccal cervical ridge is:

A

Less pronounced

83
Q

Mandibular 2nd molar: Mesial aspect

Compared to the mandibular first molar: The cervical line is:

A

Less curved

84
Q

Mandibular 2nd molar: Mesial aspect

Compared to the mandibular first molar: The mesial root is:

A

More pointed at root apex

85
Q

Mandibular 2nd molar: Distal aspect:

What is absent in this tooth compared to the mandibular 1st molar:

A

Distal cusp

86
Q

Mandibular 2nd molar: Distal aspect

Describe the distal contact:

A

Contact is centered BL & the contact is i8n the middle 1/3 occlusalcervcially

87
Q

Mandibular 2nd molar: occlusal aspect

What is the geometric outline?

A

Rectangular in shape

88
Q

Mandibular 2nd molar: occlusal aspect

Compared to the mandibular 1st premolar- what cusp is more prominent?

89
Q

Mandibular 2nd molar: occlusal aspect

Compare the four cusps from this view:

A

All relatively similar in size

90
Q

Mandibular 2nd molar: occlusal aspect

What grooves are present?

A

Central groove, buccal grooves, lingual grooves (no distobuccal groove)

91
Q

Mandibular 2nd molar: occlusal aspect

What shape do the occlusal grooves form?

92
Q

Mandibular 2nd molar: occlusal aspect

The overall appearance of the occlusal surface is _____ due to _____

A

More wrinkly due to more supplemental grooves

93
Q

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

94
Q

Mandibular 3rd molars:

Both the maxillary & Mandibular 3rd molars are considered:

A

The most variable teeth in the mouth

95
Q

The mandibular 3rd molars are usually similar to:

A

The other mandibular molars

96
Q

List the anomalies often seen in the mandibular 3rd molars:

A

Oversized crowns

97
Q

List the anomalies commonly seen the maxillary 3rd molars:

A

Undersized crowns

98
Q

Which molars are commonly impacted:

A

Mandibular 3rd

99
Q

Mandibular 3rd molars:

From a buccal view- how many cusps can be seen?

A

2 cusps, 2 roots

100
Q

Mandibular 3rd molars-

From a lingual aspect they are:

A

Similar to 1st & 2nd mandibular molars

101
Q

Mandibular 3rd molars-

From a mesial aspect, the root is:

A

Shorter & more tapered

102
Q

Mandibular 3rd molars-

From a distal view, they look:

A

Similar to mesial but narrower

103
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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