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NBDE Review > 300 Dental Anatomy: Premolars > Flashcards

300 Dental Anatomy: Premolars Flashcards

1
Q

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

A

MX 1PM

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2
Q

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

A

MX 1PM

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3
Q

Cervical cross-section ROOT outline form for maxillary 1st premolar looks like:

A

kidney

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4
Q

Cervical cross- section PULP CHAMBER shape for the maxillary 1st premolar looks like:

A

kidney

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5
Q

The non-molar tooth that most frequently exhibits 3 roots:

A

MX 1PM

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6
Q

The facial cusp of maxillary first premolar is offset towards the ______.

A

distal

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7
Q

The mesio-facial (MF) cusp ridge of the maxillary first premolar is ____ than the distal-facial (DF) cusp ridge.

A

longer

*just like the primary MX canine!

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8
Q

Which premolar has the steepest cusp inclines?

A

MX 1PM

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9
Q

The maxillary premolars (1st and 2nd) lingual cusps are offset towards the _____.

A

mesial

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10
Q

The maxillary premolars (1st and 2nd) buccal cusps are offset towards the _____.

A

distal

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11
Q

Posterior tooth with the greatest cervical-occlusal crown height

A

MX 1PM

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12
Q

Non-molar tooth with sharpest demarcation between pulp chamber and canal.

A

MX 1PM

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13
Q

The size and position of the cusps are more identical for the 1st or 2nd maxillary premolar?

A

MX 2PM

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14
Q

Which tooth has two cusps that are of equal height?

A

MX 2PM

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15
Q

Which tooth is the most symmetrical posterior tooth?

think of cusps

A

MX 2PM

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16
Q

The maxillary 2nd premolar central groove is:

A

short

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17
Q

The maxillary 2nd premolar has what feature that makes it look ‘wrinkly’?

A

Lots of supplemental grooves

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18
Q

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

A

MX 2PM

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19
Q

Which tooth has a uniquely prominent triangular ridge?

A

MD 1PM

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20
Q

Which tooth has frequently both a separate mesial and distal pit due to triangular ridge?

A

MD 1PM

21
Q

Which tooth looks like “snake eyes”?

A

MD 1PM

22
Q

The mesio-lingual (ML) developmental groove on tooth #21 originates from the ______.

A

occlusal pit

23
Q

The mesio-lingual (ML) developmental groove on tooth #21 extends onto the ____ surface

A

proximal

24
Q

The only tooth with a mesio-lingual (ML) groove:

A

MD 1PM

25
Q

Mesio-lingual (ML) developmental groove of the mandibular first premolar makes the mesial marginal ridge run at a ___ angle

A

45 degree

26
Q

Is the mesial marginal ridge of the MD 1st premolar located more cervical or distal?

A

cervical

27
Q

More of the occlusal surface can be seen from the mesial or distal end for a mandibular 1st premolar?

A

Mesial (due to 45 degree MMR)

28
Q

Occlusal outline shape for mandibular first premolar is:

A

diamond shaped

29
Q

In the rare event of a second canal for the mandibular 1st premolar, it is most likely located to the:

A

lingual

30
Q

The only premolar that frequently has one pulp horn:

A

MD 1PM

31
Q

The lingual cusp of the mandibular 1st premolar is approximately _____ the height of the facial cusp:

A

2/3

32
Q

The lingual cusp of the mandibular 1st premolar is similar in development to:

A

The cingulum of a canine

33
Q

The lingual cusp of the mandibular 1st premolar in normal occlusion does/does not occlude:

A

does NOT

34
Q

The most variation of all posterior teeth in facial vs. lingual cusp height:

A

MD 1PM

35
Q

The facial masticatory mucosa (attached gingival) is narrowest on the ____ of which tooth?

A

Facial aspect of the mandibular premolars

36
Q

The mandibular 1st premolar has the smallest _____ of any posterior tooth

A

facio-lingually

37
Q

Closest of all MANDIBULAR teeth in facio-lingal (FL) vs. mesio-distal (M-D) diameter

A

MD 1PM

38
Q

Viewed from the occlusal, the basic crown/coronal outline of a mandibular 2nd premolar is:

A

Pentagonal

39
Q

The occlusal table outline of a mandibular 2nd premolar is what shape?

A

Rectangular

40
Q

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

A

MD 2PM

41
Q

The shortest interdental papilla is between which two teeth?

A

Between the mandibular 2nd premolar and 1st molar

42
Q

The Y type mandibular premolar has ___ facial and ___ lingual cusps?

A

1 facial, 2 lingual

43
Q

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

A

MX 1M

44
Q

The only premolar with multiple lingual cusps

A

MD 2PM

45
Q

Only premolar with a lingual groove:

A

MD 2PM

46
Q

Only premolar with a central fossa:

A

MD 2PM

47
Q

The premolar that most frequently has a single central pit:

A

MD 2PM

48
Q

The most congenitally missing premolar:

A

MD 2PM

NBDE Review (14 decks)

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