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Dental Anatomy > Maxillary molar > Flashcards

Maxillary molar Flashcards

1
Q

What number tooth is the maxillary right 3rd molar?

A

1

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2
Q

What number tooth is the maxillary right 2nd molar?

A

2

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3
Q

What number tooth is the maxillary right 1st molar?

A

3

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4
Q

What number tooth is the maxillary left 3rd molar?

A

16

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5
Q

What number tooth is the maxillary left 2nd molar?

A

15

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6
Q

What number tooth is the maxillary left 1st molar?

A

14

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7
Q

What is the main function of molars?

A

Mastication of Food

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8
Q

Do molars help maintain the VERTICAL Dimension of the face in terms of preventing a protrusion of the chin and aged appearance?

A

Yes

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9
Q

DO molars maintain continuity of the arches to allow for proper alignments?

A

yes

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10
Q

Do molars help with esthetic appearances by keeping cheeks looking “full”?

A

YES

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11
Q

Complete the sentence: Molars taper from the Buccal to the _______

A

Lingual

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12
Q

Select the following option: Molars taper towards the (Mesial/Distal)

A

Distal

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13
Q

True or False: Molars are succedaneous teeth

A

False

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14
Q

How many cusps do maxillary molars normally have?

A

3 to 5

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15
Q

What is the largest tooth in the mouth?

A

Molars

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16
Q

Do molars have a broad occlusal surface or narrow occlusal surface?

A

Broad Occlusal Surface

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17
Q

Are molars wider than they are tall?

A

YES

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18
Q

True or False: The molars normally have a crown height that is taller than other teeth in the mouth

A

FALSE- Molars are short and wide

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19
Q

True or False: Molars taper from buccal to lingual

A

T

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20
Q

Do crowns tend to get more narrow as you move lingually?

A

yes

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21
Q

True or false: Typically the buccal surface is wider M-D than the lingual surface

A

True

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22
Q

Do the maxillary 1st molars have a wider lingual surface M/D?

A

YES- that is an exception to card #21

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23
Q

True or False: Molars taper towards the distal

A

t

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24
Q

True or False: The distal aspect of the tooth is wider buccolingually than the mesial crown

A

FALSE-

The mesial aspect of the tooth is wider buccolongually than the distal crown

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25
Q

Which marginal ridge sits lower, more cervically?

A

Distal Marginal Ridge

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26
Q

Which marginal ridge sits lower, more cervically?

A

Distal Marginal Ridge

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27
Q

True or False: Since the distal marginal ridge sits lower than the mesial marginal ridge, the majority of the occlusal surface is viewable on the distal

A

T

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28
Q

Where is the height of contour on buccal?

A

c1/3

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29
Q

lingual

A

m1/3

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30
Q

Where is the height of contour on the mesial?

A

Junction between the occlusal and middle third

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31
Q

Where is the height of contour on the distal?

A

M 1/3

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32
Q

When is the first calcification of maxillary first molar?

A

Birth

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33
Q

enamel complete

A

3-4 years

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34
Q

eruption

A

6

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35
Q

root completion

A

9-10 years

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36
Q

Is the crown width greater BL than MD?

A

Yes

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37
Q

Are the roots longer than the crown?

A

YES

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38
Q

How many roots does the maxillary 1st molar have?

A

3 roots, 2 buccal roots and 1 lingual root

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39
Q

How many roots do maxillary molars have? Versus how many roots do mandibular molars have?

A

3 roots; 2 roots

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40
Q

How many cusps does the maxillary 1st molar have?

A

5 cusps- arranged in size: Mesiolingual Cusp, Mesiobuccal Cusp, Distolingual Cusp, Distobuccal Cusp, Cusp of Carabelli

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41
Q

Does the maxillary 1st and 2nd molar have an oblique ridge on the occlusal surface?

A

YES- maxillary 1st molars oblique ridge is more prominent and bigger

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42
Q

Is the mesial distal width on the lingual side of the maxillary first molar typically greater?

A

YES

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43
Q

What is the “fifth” cusp often referred to as on maxillary 1st molar?

A

Cusp of Carabelli

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44
Q

True or False: Maxillary 1st molars usually have 3 roots with one canal

A

T

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45
Q

Along with what other tooth in the mouth are maxillary 1st molars considered cornerstones of the dental arches- other tooth besides canines

A

Mandibular 1st molar

46
Q

Is the root trunk significant from the buccal aspect?

A

YES

47
Q

Where is the furcation of the two buccal roots centered on?

A

Mesial Distally

48
Q

Which root is the longest root of the maxillary 1st molar?

A

Palatal Root/Lingual Root

49
Q

What angle does the mesiobuccal cusp ridges form?

A

Obtuse Angle

50
Q

What angle does the distobuccal cusp ridge forms?

A

90/Right Angle

51
Q

True or False: Buccal Cusps on the maxillary 1st molar are longer than lingual cusps

A

False

52
Q

What groove is found between the two cusps on the buccal surface?

A

Buccal groove

53
Q

From the lingual aspect, what makes up the majority of the surface of the tooth and is also the largest of the four main cusps?

A

Mesiolingual Surface/Cusp

54
Q

Which cusp form a spheroidal/round shape?

A

Distolingual cusp

55
Q

What groove is found on the lingual surface of the tooth that separates the two lingual cusps?

A

Lingual groove

56
Q

From the mesial aspect, which root is the longest?

A

Palatal root

57
Q

Is the palatal root more narrow buccolingually or narrower mesial distally?

A

More narrow buccolingually- best seen from proximal views

58
Q

Which roots are wider buccolingually?

A

The two buccal roots

59
Q

From the mesial aspect do you see 2/3 of the mesiobuccal root and 1/3 of the lingual root?

A

Y

60
Q

What makes up the Height of Contour on the buccal surface?

A

Cervical Ridge

61
Q

Will you see the cusp of carabelli on the mesial aspect of the tooth?

A

Y

62
Q

Does the cusp of carabelli vary in size, via region, ethnicity, and genetically?

A

Y

63
Q

Is the cusp of carabelli functional?

A

No

64
Q

Due to what phenomenon is it possible that we can see some of the buccal surface from the distal aspect?

A

Distal taper

65
Q

Since the distal marginal ridge sits more gingival, this reveals what particular ridge?

A

Triangular ridges of the distal portion of the occlusal surface (distal buccal triangular ridge and the distal lingual triangular ridges)

66
Q

How is the cervical line situated on the distal aspect of the crown?

A

Straight across

67
Q

Rank the three roots in size from biggest to smallest on the maxillary 1st molar!

A

Palatal Root/Lingual Root, Mesiobuccal Root, and Distobuccal Root

68
Q

What shape is the occlusal surface?

A

Rhomboidal in shape

69
Q

What is an oblique ridge?

A

A transverse ridge that crosses obliquely

70
Q

What is a transverse rige?

A

Two triangular ridges combined

71
Q

What is the direction that the oblique ridge runs in?

A

Distobuccal to mesiolingual

72
Q

Does the maxillary 1st molar have a significant central fossa and mesial and distal triangular fossa as well?

A

Y

73
Q

From the distal triangular fossa, is there a central groove that crosses OVER the oblique ridge?

A

NO

74
Q

From the distal triangular fossa, is there a central groove that crosses OVER the oblique ridge?

A

NO

75
Q

What is a groove that is somewhat a continuation of the central groove that crosses onto the oblique ridge?

A

Transverse groove of the oblique ridge

76
Q

Where does a significant ridge from the distal triangular fossa end up that continues along the side of the oblique ridge?

A

Lingual Goove

77
Q

What reflects the triangle arrangement of the roots?

A

The triangular arrangement of the three large cusps: Mesiolingual, Mesiobuccal, and Distolingual

78
Q

Which root is over the top of the mesiolingual cusp?

A

Palatal Root/Lingual root

79
Q

What makes up the maxillary molar primary cusp triangle?

A

The three large cusps and the ridges that go between them

80
Q

Does the pulp chamber follow the cusp triangle formation?

A

Y

81
Q

From the buccal, how many cusps are visible?

A

4- not the carabelli

82
Q

Is the mesiobuccal cusp broader than distobuccal cusp?

A

Y

83
Q

How many roots are visible from the buccal aspect?

A

All 3

84
Q

How many cusps are visible from the lingual aspect?

A

Only 3, you CANNOT see the two buccal cusps

85
Q

How many cusps can you see from the mesial aspect?

A

Only 3- mesiobuccal, mesiolingual, and cusp of carabelli

86
Q

How many roots can you see from the mesial aspect?

A

Only 2, remember the distobuccal root is smallest

87
Q

How many cusps can you see from the distal aspect?

A

4- not the cusp of carabelli

88
Q

How many roots can you see from the distal aspect?

A

All 3

89
Q

What is the form of the occlusal surface?

A

Rhomboidal

90
Q

How many major fossa do you have?

A

Two major fossa: Central fossa an Distal Fossa

91
Q

Does the maxillary first molar have an oblique ridge that runs from the distobuccal to mesiolingual?

A

Y

92
Q

Does the maxillary 2nd molar have a cusp of carabelli?

A

NO- thus only four cusps

93
Q

When is the first calcification of maxillary 2nd molar?

A

2.25- 3 years

94
Q

When is enamel completion of maxillary 2nd molar?

A

7-8 years

95
Q

When is eruption of maxillary 2nd molar?

A

12-13 years

96
Q

When is root completion of maxillary 2nd molar?

A

14-16 years

97
Q

How many roots does the maxillary 2nd molar have?

A

3- they all tend to have one canal associated as well

98
Q

True or False: The roots are more parallel in the maxillary 2nd molars than the 1st, and this tends to be the case as you move more posterior because you lose room

A

T

99
Q

Is the crown on the 2nd maxillary molar shorter than the first?

A

Y

100
Q

Where is the furcation of the Mesiobuccal and Distobuccal Roots?

A

Centered Mesiodistally just like the maxillary 1st molar

101
Q

Is the crown more narrow in the mesiodistal dimension than the first?

A

Y

102
Q

From the lingual aspect, since the distolingual cusp is smaller than that on the first, what is the shape of that distolingual cusp?

A

Spheroidal

103
Q

Form the mesial aspect, is the cervical ridge on the buccal apparent?

A

Y

104
Q

What is the shape on the proximal aspect of all maxillary molars?

A

Trapezoidal

105
Q

Does the distal marginal ridge sit lower on the maxillary 2nd molars?

A

YES- thus you can see the triangular ridges on occlusal surface

106
Q

Do you have an oblique ridge on the maxillary 2nd molars too?

A

YES- but it is smaller- still runs in a distobuccal to mesiolingual direction

107
Q

Besides the buccal groove on the 2nd maxillary molar and not having a pit, is it shorter and longer than first?

A

Shorter

108
Q

What is more prominent on the 2nd maxillary molar?

A

Mesiobuccal cervical edge

109
Q

What is another name for maxillary third molars?

A

Wisdom teeth

110
Q

True or False: Maxillary 3rd molars appear as a developmental anomaly, some people do NOT have them

A

t

111
Q

Are roots commonly fused on third molars?

A

Y

112
Q

True or False: There are large amounts of variation when it comes to the anatomy of third molars

A

t

Dental Anatomy (17 decks)

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