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Boards Dental Anatomy > Premolars - Molars > Flashcards

Premolars - Molars Flashcards

1
Q

what tooth has the most pronounced developmental marginal groove of any MAXILLARY tooth?

A

max first premolar

*leads into the mesial concavity

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2
Q

what shape is the cervical cross section of a max first premolar?

A

kidney

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3
Q

what is the non-molar tooth that most frequently exhibits three roots?

A

max first premolar

*think of non-molar tooth that usually has two roots

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4
Q

the facial cusp of the max first premolar is offset in which direction?

A

distal

*bc it has a longer mesio-facial cusp ridge

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5
Q

what is the only premolar with a longer mesial cusp ridge ?

A

max first

*so does the PRIMARY max canine

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6
Q

what premolar has the steepest inclines?

A

max 1rst premolar

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7
Q

the maxillary premolars (both) lingual cusps are off set to which side?

A

mesial

*remember that the buccal of the first is unique in that it is off set to the distal

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8
Q

what tooth in the POSTERIOR has the greatest cervico-occlusal crown height

A

max first premolar

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9
Q

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

A

max first premolar

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10
Q

which premolar has more identical placement of size and posistion of cusps?

A

max second premolar

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11
Q

which premolar has two cusps that are of equal height?

A

max second premolar

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12
Q

what is the most symmetrical posterior tooth?

A

max second premolar

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13
Q

which tooth has a short cental groove with a lot of supplemental grooves?

A

max second premolar

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14
Q

which tooth has fossa that are closest in size compared to any other posterior tooth?

*makes the tooth look WRINKLY

A

max second premolar

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15
Q

which premolar has a uniquely prominent triangular ridge?

A

mandib first PM

*snake eyes, no cental groove

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16
Q

what causes the snake eyes of a mandib first PM?

A

prominent triangular ridge

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17
Q

where does the mesiolingual groove on mandib first PMs originate?

A

occlusal pit

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18
Q

the mesiolingual developmental groove on a mandib PM extends where?

A

from occlusal pit to the proximal surface

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19
Q

what is the ONLY tooth with a mesio-lingual groove?

A

mandib first PM

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20
Q

what does the mesio-lingual developmental groove of the mandib first PM do to the mesial marginal ridge of that tooth?

A

makes it run at a 45 degree angle

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21
Q

for the mandib first PM, which marginal ridge is located more cervically?

A

mesial

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22
Q

for the mandib first PM, which view (mesial/distal) can be used to see more of the occlusal surface?

A

mesial

*due to the 45 degree mesial margiinal ridge

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23
Q

what is the occlusal outline shape for the mandib first PM?

A

diamond

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24
Q

in the rare event of a second canal for a mandib 1rst PM it is most likely located to the (facial/lingual)

A

lingual

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25
Q

what is the only PM that frequently only has one pulp horn?

A

mandib first

due to small lingual cusp

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26
Q

the lingual cusp of the mandib first PM is approx ____ the height of the facial cusp?

A

1/3

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27
Q

the lingual cusp of a mandib first PM is similar in development to ____

A

cingulum of a canine

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28
Q

does the lingual cusp of a mandib first PM normally occlude?

A

no

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29
Q

what tooth has the most variation of ALL POSTERIOR teeth in facial vs lingual cusp height?

A

mandib first PM

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30
Q

the facial masticatory mucosa (attached gingiva) is (widest/narrowest) on the facial aspect of mandib PM?

A

narrowest

*remember that this is for MANDIBULAR!!!

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31
Q

what POSTERIOR tooth has the smallest facio-lingual dimension?

A

mandib first PM

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32
Q

what MANDIBULAR tooth is the closest in facio-lingual vs mesio-distal diameter?

A

mandib first PM

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33
Q

when viewed from the occlusal, the basic coronal outline of a mandib second PM is what shape?

A

pentagon

*BE CAREFUL, the occlusal table is RECTANGULAR

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34
Q

which PM is most likely to have a crescent shaped central developmental groove is what?

A

mandib second PM

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35
Q

the shortest interdental papilla is where?

A

between the mandibular second PM and the mandibular first molar

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36
Q

the Y-type mandibular premolar has how many cusps?

A

one facial and two lingual

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37
Q

the Y-type mandib second PM has the same number of occlusal pits as what other tooth?

A

MAXILLARY 1rst MOLAR

3

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38
Q

what is the only PM with multiple lingual cusps and a lingual groove?

A

mandib 2nd PM

39
Q

what is the only PM with a central fossa?

A

mandib second PM

40
Q

what is the most congenitally missing PM?

A

mandib 2nd

41
Q

what is the shape of the occlusal outline form of a max first molar

A

rhomboidal

42
Q

what angles from the occlusal view of a max first molar are acute?

A

mesiofacial and distolingual

43
Q

what angles from the occlusal view of a max first molar are obtuse

A

distobuccal and mesiolingual

*these make up the oblique ridge

44
Q

which embrasure (buccal/lingual) is larger for a max first molar?

A

buccal

*max first molars taper to the facial

45
Q

what are the most prone surfaces of all molars?

A

lingual of maxillary

buccal of mandibular

46
Q

what is the largest root of the max first molar

A

palatal

47
Q

what is the smallest root of the max first molar?

A

distobuccal

48
Q

for max first molars, from the facial view, the apex of the lingual root is in line with what?

A

the facial groove

49
Q

for max molars, from the lingual view, the apex of the lingual root is in line with what?

A

the midpoint of the MD diameter

50
Q

if there is a 4th pulp canal in the max first molar, where is it usually?

A

mesiobuccal canal

51
Q

which furcation of the max first molar is the closest to the cervical line?

A

mesial

52
Q

which furcation of the max first molar is the furthest from the cervical line

A

distal

  • M - B - D
  • you get further away from the cervical line the more distal you go
53
Q

the oblique ridge of max first molar forms what?

A

distal boundary of the central fossa

54
Q

which angles (acute/obtuse) form the oblique ridge?

A

obtuse

55
Q

the center of the oblique ridge on a max first molar is at the same level as what?

A

marginal ridge

56
Q

the mesiolingual cusp of the max molar occludes where?

A

in the central fossa of the mandib molars

57
Q

what tooth has the greatest faciolingual diameter for all teeth (crowns)

A

max first molar

*think cusp of carabelli

58
Q

which max posterior tooth is closest in size faceio-lingually vs mesio-distally?

A

max first molar

59
Q

for max first molars, are they wider MD facially or lingually?

A

facially

60
Q

what is the only cusp of the max first and second molar that is NOT part of the molar cusp triangle?

A

distolingual cusp

61
Q

what is the largest and longst cusp of the max first molars/

A

mesiolingual

62
Q

which tooth is most likely to be forced into the maxillary sinus during an extraction?

A

max first molar

63
Q

where is the concavity on max first molars that can pose special problems in matrix placement?

A

distal

64
Q

which max molar has a longer distolingual groove?

A

max second molar

65
Q

which max molar may not have a distolingual cusp present/

A

max second molar

66
Q

how do the roots of the max second molar complare to the roots of the first molar?

A

less divergent and have greater DISTAL inclinations

67
Q

what is the shape of the cross sectional outline of a max second molar?

A

triangular

68
Q

what is the term for the groove pattern for the mandib first molar

A

Y or dryopethicus pattern

69
Q

what is the shape of the occlusal outline of a mandibular first molar?

A

pentagon

70
Q

what is the largest cusp of the mandib first molar

A

mesiofacial

71
Q

what tooth has the largest MD dimension in the mouth?

A

mandib first molar

72
Q

what are the ONLY mandib molars that are wider MD than FL

A

mandib first

73
Q

what are the ONLY posterior teeth that are wider MD than FL

A

mandib first

74
Q

what tooth has the largest FL diameter of any mandibular tooth?

A

mandib first molar

75
Q

what tooth is the largest occlusocervically of any mandibular molar?

A

mandib first molar

76
Q

the facial surfaces of teh mandibular molars are located (medial/distal) to teh border of the ascending ramus?

A

medial

77
Q

what is a key feature that differentiates a mandib first and second molar?

A

number of developmental grooves

*M2 has one buccal)

78
Q

what is the name of the groove between the DF cusp and the D cusp of the mandibular first molar ?

A

distofacial (NOT distal)

79
Q

how many canals does the mandib first molar have?

A

3

*usually have 2 MESIAL canals

80
Q

what tooth has the longest root of any other molar?

A

mandib first molar

81
Q

what tooth has the greatest root separation of any other tooth?

A

mandib first molar

82
Q

at a mid root cross section for the first molars, the largest with be where?

A

mesial of mandibular

need more room for MB2

83
Q

what root has greatest FL dimension of any other root?

A

Mesial of mandib first molar

84
Q

what cusp occludes in teh central fossa of the max molars

A

distobuccal cusp of mandib

85
Q

the ideal position and height of lingual cusps of mandib first molars accomodates what?

A

working movement

86
Q

what is the occlusal pattern for the mandib second molar

A

cruciform

87
Q

where is the greatest FL dimension of a mandib second molar?

A

mesial 1/3

how you tell the R from the L

88
Q

what are the only POSTERIOR teeth that are wider MD than FL

A

mandibular molars

89
Q

what are the only mandibular teeth that are wider MD than FL

A

mandib molars

90
Q

the crown of the mandib second molar inclines where?

A

mesially and lingually

91
Q

which teeth have long axis of their root apices facial and their crowns lingual?

A

mandib molars

92
Q

which molar most frequently has only 3 cusps

A

max third molars (most frequently heart shaped)

93
Q

what tooth has the greatest distal root inclination of any tooth?

A

MANDIB 3rd molars

94
Q

what tooth has the shortest root of any mandibular tooth?

A

mandib 3rd root

Boards Dental Anatomy (5 decks)

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