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NBDE I > Dental Anatomy Permanent Premolars > Flashcards

Dental Anatomy Permanent Premolars Flashcards

1
Q

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

A

maxillary 1st premolar

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2
Q

what maxillary tooth has a mesial concavity that makes it difficult to adapt a matrix band?

A

maxillary 1st premolar

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3
Q

the cervical cross section of the maxillary 1st premolar exhibits a ___shaped root outline

A
  • kidney

- it also exhibits a kidney shaped pulp chamber floor

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4
Q

what non-molar tooth that most frequently exhibits 3 roots is the ___

A
  • maxillary 1st premolar

- also the non-molar tooth that usually has 2 roots

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5
Q

the facial cusp of the maxillary 1st premolar is offset to the ___

A

distal

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6
Q

which is the only premolar tooth with a mesio-facial cusp ridge that is longer than the disto-facial cusp ridge?

A

maxillary 1st premolar

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7
Q

which premolar exhibits the steepest cusp inclines?

A

maxillary 1st premolar

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8
Q

both maxillary premolar lingual cusps are offset to the ___. where do the buccal cusps of the maxillary premolars offset?

A
  • lingual cusps offset to the mesial
  • buccal cusp of the 1st premolar offsets to the distal
  • buccal cusp of the 2nd premolar offsets to the mesial
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9
Q

what is the posterior tooth that has the greatest cervico-occlusal crown height?

A

maxillary 1st premolar

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10
Q

what is the non-molar tooth with the sharpest demarcation between pulp chamber and canal?

A

maxillary 1st premolar

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11
Q

the size and position of the cusps are more identical for the (1st/2nd) maxillary premolars than the (1st/2nd)

A

2nd, 1st

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12
Q

which maxillary premolar has two cusps that are of equal height?

A

maxillary 2nd premolar

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13
Q

what is the most symmetrical posterior tooth?

A

maxillary 2nd premolar (has to do with cusps)

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14
Q

which tooth has a wrinkly appearance and why?

A

maxillary 2nd premolar, due to its short central groove with many supplemental grooves

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15
Q

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

A

maxillary 2nd premolar

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16
Q

what premolar has a uniquely prominent triangular ridge?

A
  • mandibular 1st premolar
  • this gives it its characteristic snake eyes
  • no central groove
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17
Q

which premolar frequently has separate mesial and distal pits?

A
  • mandibular 1st premolar (snake eyes)

- this is due to its triangular ridge

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18
Q

which tooth is the only one that has a mesiolingual developmental groove?

A

mandibular 1st premolar

19
Q

the mesiolingual developmental groove on the mandibular 1st premolar originates from ___

A

the occlusal pit

20
Q

the mesiolingual developmental groove on the mandibular 1st premolar extends onto the ___ surface

A

proximal

21
Q

the mesiolingual developmental groove on the mandibular 1st premolar has what affect on the mesial marginal ridge?

A

it makes it run at a 45 degree angle

22
Q

between the mandibular 1st and 2nd premolars, which one has a mesial marginal ridge that is located more cervical than the distal?

A

mandibular 1st premolar

23
Q

for a mandibular 1st premolar, more of the occlusal surface can be seen from the (M/D) than the (M/D)

A

mesial than distal, due to the 45 degree angle of the mesial marginal ridge

24
Q

the occlusal outline for the mandibular 1st premolar from the occlusal view is ___

A

diamond shaped

25
Q

in the rare event of a second canal for a mandibular 1st premolar, it is most likely located ___

A

on the lingual

26
Q

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

A

mandibular 1st premolar

27
Q

the lingual cusp of the mandibular 1st premolar is approximately ___ the height of the facial cusp

A

2/3

28
Q

the lingual cusp of the mandibular 1st premolar is similar in development to the ___ of a canine

A

cingulum

29
Q

the lingual cusp of what tooth, in normal occlusion, does not occlude?

A

mandibular 1st premolar

30
Q

which tooth has the most variation of all posterior teeth in facial vs lingual cusp height?

A

mandibular 1st premolar

31
Q

the facial masticatory mucosa (attached gingival) is narrowest on the facial aspect of which teeth?

A

mandibular premolars

32
Q

which tooth has the smallest FL dimension of all posterior teeth?

A

mandibular 1st premolar

33
Q

which mandibular tooth is closest of all mandibular teeth in FL vs MD diameter?

A

mandibular 1st premolar

34
Q

from an occlusal view, what is the coronal outline of a mandibular 2nd premolar? what about the outline of the occlusal table?

A
  • coronal outline is pentagonal

- occlusal table outline is rectangular

35
Q

which premolar is most likely to have a crescent-shaped central developmental groove?

A

mandibular 2nd premolar

36
Q

where is the shortest interdental papilla located?

A

between the mandibular 2nd premolar and the 1st molar

37
Q

the Y type mandibular 2nd premolar has how many facial and lingual cusps?

A

1 facial, 2 lingual

38
Q

the Y type mandibular 2nd premolar has the same number of occlusal pits as what other tooth?

A

maxillary 1st molar

39
Q

what is the only premolar with multiple lingual cusps?

A

mandibular 2nd premolar

40
Q

what is the only premolar with a lingual groove?

A

mandibular 2nd premolar (don’t confuse this with the mesiolingual developmental groove of the mandibular 1st premolar)

41
Q

what is the only premolar with a central fossa?

A

mandibular 2nd premolar

42
Q

the premolar that most frequently has a single central pit is the ___

A

mandibular 2nd premolar

43
Q

___ is the most congenitally missing premolar

A

mandibular 2nd premolar

NBDE I (7 decks)

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