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Boards - Dental Anatomy Facts from videos > Dental Anatomy Facts Part 2 > Flashcards

Dental Anatomy Facts Part 2 Flashcards

1
Q

Most pronounced developmental marginal groove of any max tooth

A

Max 1st premolar, mesial marginal ridge

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2
Q

Mesial side of max 1st premolar

A

mesial concavity that makes it difficult to adapt a matrix band
mesial marginal developmental groove

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3
Q

The cervical cross section of max 1st premolar has what shape

A

Kidney shape - because of mesial concavity

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4
Q

Cervical cross section of max first premolar pulp chamber floor has what shape

A

kidney shape

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5
Q

Which non-molar tooth most frequently exhibits three roots

A

Max first premolar

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6
Q

The facial cusp of the max first premolar is offset to what side

A

offset to the distal

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7
Q

Which facial cusp ridge is longer on max first premolar

A

Longer mesio-facial cusp ridge (cusp tip offset to distal)

-only premolar with longer mesial cusp ridge (along with primary maxillary canine)

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8
Q

Which premolar has the steepest cusp inclines among premolars

A

Max first premolar

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9
Q

Maxillary premolars lingual cusps are off set to what side

A

Mesial

buccal cusps is to distal

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10
Q

Which tooth has greatest cervico-occlusal crown height among posterior teeth

A

Max first premolar

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11
Q

Which non-molar tooth has the sharpest demarcation between pulp chamber and canal

A

Max first premolar

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12
Q

Relation of cusp sizes on max first premolar to max 2nd premolar

A

Size and position of cusps of 2nd max premolar are more identical than max 1st

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13
Q

What is the most symmetrical posterior tooth

A

Max 2nd premolar

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14
Q

Which tooth has a short central groove and lots of supplemental grooves giving it a wrinkly look

A

Max 2nd premolar

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15
Q

Which tooth has fossa closest in size compared to any other posterior tooth

A

Max 2nd premolar

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16
Q

Which tooth uniquely has a prominent triangular ridge

A

Mand first premolar

-may not have central groove

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17
Q

Which tooth frequently has both a separate mesial and distal pit

A

Mand first premolar

snake eyes - prominent triangular ridge

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18
Q

Mesial side of #21

A

mesiolingual developmental groove - originates from the mesial occlusal pit

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19
Q

How far does mesiolingual developmental groove extend on #21

A

Onto proximal surface

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20
Q

Only tooth with a mesio-lingual groove

A

Mand first premolar

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21
Q

Angle of the mesial marginal ridge of mand 1st premolar

A

runs at a 45 degree angle because of mesial marginal ridge

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22
Q

Relation between position of mesial and distal marginal ridges of mand first premolar

A

mesial marginal ridge is located more cervical than the distal

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23
Q

From which view can more of the occlusal surface be seen on a mand first premolar

A

from the mesial

lower marginal ridge - 45 degree angle

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24
Q

Occlusal outline/shape of mand first premolar

A

diamond shape

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25
Q

In the rare event of a second canal for a mand 1st premolar, it is most likely located where

A

to the lingual

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26
Q

Which premolar frequently only has one pulp horn

A

Mand first premolar

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27
Q

Size relation between cusps of mand first premolar

A

lingual cusp is about 2/3s the height of facial

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28
Q

Lingual cusp of mand first premolar is similar in development to what

A

cingulum of canine

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29
Q

Occlusion of lingual cusp of mandibular first premolar in normal occlusion

A

does not occlude

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30
Q

Which tooth has most variation of facial vs lingual cusp height among all posterior teeth

A

Mandibular first premolar

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31
Q

Where is masticatory mucosa (attached gingiva) narrowest

A

facial aspect of man premolars

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32
Q

Smallest facio-lingual dimension of all posterior teeth

A

mand first premolar

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33
Q

Which tooth is closest of all mandibular teeth in facio-lingual vs mesio-distal diameter

A

Mand first premolar

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34
Q

Outline shape from occlusal view of crown of mand second premolar
- shape of occlusal table

A

crown is pentagonal

= occlusal table is rectangular

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35
Q

The premolar most likely to have a crescent-shaped central developmental groove

A

Mand 2nd premolar

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36
Q

Shortest interdental papilla located where

A

between mand second premolar and first molar

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37
Q

Cusp locations of the Y type mand premolar

A

one facial and two lingual cusps

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38
Q

Y type mand second premolar has same number of occlusal pits as what tooth

A

Max first molar - 3 pits

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39
Q

Only premolar with multiple lingual cusps

A

Mand second premolar - Y type

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40
Q

Only premolar with a lingual groove

A

Mand second premolar - Y type

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41
Q

Only premolar with a central fossa

A

Mand second premolar - Y type?

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42
Q

The premolar most frequently with s single central pit

A

Mandibular second premolar

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43
Q

Most congenitally missing premolar

A

Mand second premolar

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44
Q

Occlusal outline form/shape of max first molar

A

rhomboidal

45
Q

Which line angles of an occlusal view of max first molar are acute angles

A

Mesio facial and distolingual line angles

46
Q

Mesio-lingual and disto-facial line angles of max first molar from occlusal view

A

obtuse angles (of the rhomboidal shape)

47
Q

Which line angles of max first molar make up oblique ridge

A

the obtuse ones

Mesio-lingual and disto-facial line angles

48
Q

The maxillary first molar tends to taper towards which direction

A

taper towards the facial rather than lingual

49
Q

Which embrasure of the mx first molar is larger than the other - buccal or lingual

A

buccal is larger because max first molar tapers more to towards the buccal

50
Q

Most prone (flat/level) surfaces of molars

A

lingual surfaces of maxillary molars and facial surfaces of mandibular molars

51
Q

Largest root of max first molar

A

Palatal

52
Q

Smallest root of max first molar

A

distobuccal root

mesiobuccal root needs room for the 2nd canal (MB2), so it will be bigger

53
Q

From facial view, the apex of the lingual root of max first molar is in line with what

A

facial groove

54
Q

From lingual view of max first molar, the apex of the palatal root is in line with what

A

midpoint between mesial and distal

55
Q

Where is a 4th canal (when present) located on max first molar

A

mesiobuccal canal

56
Q

Of the three furcations of max first molar, which is closest to the cervical line

A

Mesial furcation

57
Q

Which furcation on max first molar is furthest from the cervical line

A

distal furcation

You get further away the more distal you go

58
Q

Which molar has the oblique ridge

A

max first and second molar

59
Q

Oblique ridge of max first molar forms what boundary of the central fossa

A

distal boundary

60
Q

Which corners of max first molar coincide with direction of the oblique ridge

A

the obtuse corners

mesiolingual and distobuccal

61
Q

Compare heights of the centers of oblique ridge and marginal ridge of max first molar

A

All are at the same level

62
Q

The mesiolingual cusp of max molars occludes where

A

in central fossa of mand molars

63
Q

Which tooth has greatest faciolingual diameter of crown of all teeth

A

Max first molar - think cusp of carabelli

64
Q

Tooth with closest in size of faciolingual vs mesiodistal lengths of any Max Posterior tooth

A

Max first molar

65
Q

Compare mesiodistal widths on buccal and lingual sides of max first molar

A

mesiodistal length is longer toward the facial than toward the lingual

66
Q

Which max first molar cusp is not part of the the cusp triangle

A

distolingual cusp

67
Q

Which max first molar cusp is largest and longest

A

mesiolingual cusp

68
Q

Which tooth is mostly likely forced into the maxillary sinus during extraction

A

Max first molar

69
Q

Distal surface of Max first molar

A

Has distal concavity, causes difficulty with matrix placement

70
Q

Compare lengths of distal lingual grooves of max first vs second molars

A

Maxillary first molar has shorter distolingual groove than second molar

71
Q

Which cusp of the max second molar is not part of the molar cusp triangle

A

distolingual cusp

72
Q

If distolingual cusp is not present on max 2nd molar, describe tooth

A

3 cusp type heart shape

73
Q

Nature of max second molar roots

A

less divergent

-greater distal inclinations

74
Q

Cross sectional outline at cervical of 2nd max molar is what shape

A

roughly triangular

75
Q

The groove pattern for mand first molar

A

Considered a Y or Dryopethicus pattern

76
Q

The occlusal outline of mand first molar

A

Pentagon

77
Q

Smallest cusp of mand first molar is

A

distal cusp

78
Q

Largest cusp of mand first molar

A

Mesio-facial

mesio-facial, mesiolingual, distolingual, distobuccal, distal

79
Q

Largest M-D crown dimension of any other tooth

A

Mand first molar - think 3 buccal cusps

80
Q

Only Mandibular teeth that are wider mesio-distally than facio-lingually

A

Mand molars

81
Q

Only posterior teeth that are wider M-D than F-L

A

Mand molars

82
Q

Greatest M-D diameter of all molars

A

Mand first molar

83
Q

Largest F-L dimension of any mandibular tooth

A

Mand first molar

Max first molar has greatest F-L dimension of ALL teeth (think cusp of carabelli)

84
Q

Largest occluso-cervical dimension of any mandibular molar

A

Mand first molar

85
Q

Facial surface of mandibular molars in relation to border of ascending ramus

A

they are medial to border of ascending ramus

86
Q

Number of developmental grooves on mand first molar compared to mand second molar

A

two buccal grooves on first mand molar

-only one buccal groove on second

87
Q

How many facial cusps on mand first molar

A

three facial cusps

88
Q

Name of the developmental groove between the DF cusp and the D cusp of mand first molar

A

Distofacial groove

not distal groove

89
Q

Mandibular first molar usually has how many roots and canals

A

two roots and three canals

90
Q

Mandibular first molar canals are located where

A

two mesial canals, one distal

91
Q

Which tooth has the longest root of any other molar

A

Mand first molar

92
Q

Which tooth has greatest root separation of any other tooth

A

mand first molar

only two roots, less going on, more space, less distally and less crowded

93
Q

Mid root cross section of mand first molar, where is it larger

A

mesial is larger - need room for two mesial canals

94
Q

Which root has greatest F-L dimension of any other root

A

Mand first molar mesial root - need room for two mesial canals

95
Q

Cusp occlusion of mand molars with max molars

A

the distobuccal cusp of mand molars occludes in central fossa of max molars

96
Q

What accommodates working movements on mand first molars

A

the ideal position and height of lingual cusps

97
Q

The groove pattern for the mand second molar is what shape

A

a cross pattern or a + shape

cruciform occlusal pattern

98
Q

How to tell the difference between a right and left mand second molar

A

the mesial third has a greater F-L diameter

99
Q

The only posterior teeth that are wider M-D than F-L

A

Mand molars

100
Q

Only Mand teeth that are wider M-D than F-L

A

Mand molars

101
Q

Alignment of mand second molar crown

A

Inclines to the mesial and lingual - think of the larger mesial cusps weighing it down

This places the apex of the crown more facial, and the crowns more lingual

102
Q

Mand molars and border of the ascending ramus

A

Facial surfaces of mandibular molars located medial to the border of the ascending ramus

103
Q

Occlusion of Max 3rd molar

A

has a single antagonist

along with mand centrals

104
Q

What molar most frequently has only 3 cusps

A

Max third molar

105
Q

Max 3rd molars are frequently what shape from an occlusal view, why

A

heart shaped, b/c they are missing the DL cusp

106
Q

Which tooth has most variation in crown morphology

A

3rd molars - maybe mand third

107
Q

Greatest distal root inclination of any other tooth

A

Mand 3rd molar

108
Q

Shortest root of any mand tooth

A

Mand 3rd molar

Boards - Dental Anatomy Facts from videos (7 decks)

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