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Dental Anatomy > Premolars > Flashcards

Premolars Flashcards

1
Q

All premolars have the same ……. & …….

Max. premolars have greater …… width

A

dimensions & length

faciolingual diameter

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2
Q

The lingual cusp is more distinct on ……

A

Max. premolars

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3
Q

The Max. occlusal table is ……., while the Mand. one is ……..

A

centered faciolingually

lingually displaced

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4
Q

Mand. buccal cusp is more towards the ……

A

faciolingual midpoint

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5
Q

Max. buccal surface is …… from height of contour to cusp tip, while the Mand. is ……

A

straight

convex

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6
Q

The Max. buccal height of contour is ……. than that of the Mand., however both are in the …… third

A

lower

cervical

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7
Q

The Max. lingual height of contour is …… than that of the Mand.

A

lower

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8
Q

The Max. lingual height of contour is located at ….. & the Mand. lingual height of contour is at …….

A

the junction of middle and cervical thirds

* upper middle third

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9
Q

Mand. premolars have ……. root cross section, while the Max. have ……..

A

round

* mesial root concavities

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10
Q

The mesial marginal developmental groove is a feature of …….

A

Max. first premolar

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11
Q

The Max. first premolar buccal cusp is displaced ………

A

distally

* The lingual is mesially displaced

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12
Q

The Mand. first premolar features a ……. developmental groove

A

mesial lingual

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13
Q

The tooth with the greatest discrepancy in size between cusps is ……..

A

Mand. first premolar

* This tooth resembles canines

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14
Q

The occlusal surface on the Mand. first premolar is ……… slanted

A

lingually

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15
Q

The premolar that may contain a central pit is ……..

A

Mand. second premolar

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16
Q

The buccal surface is …… than the lingual surface on the Max. first premolar

A

wider

* The buccal surface has a trilobed appearance

17
Q

The Max. first premolar features a mesial concavity that ……….

A

extends into the mesial root surface, forming mesial intraradicular groove
* The mesial marginal developmental groove is an extension of the central groove, which crosses the mesial marginal ridge

18
Q

The Max. first premolar occlusal view shows ……. profile, and the occlusal table has an …… shape

A

hexagonal

trapezoidal (where the mesial and distal surfaces converge towards the lingual)

19
Q

The Max. second premolar differs from the first in what aspects?

A
  1. Smaller & narrow shouldered
  2. Buccal surface has relatively indistinct lobes
  3. Mesial marginal ridge not interrupted by a groove
  4. The cusps are of equal heights (unlike the first), and they are centered in mesiodistal dimension
  5. Occlusal view shows diamond crown profile, and the occlusal table is rectangular with little lingual convergence
  6. Less prominent mesial axial concavity
20
Q

The Mand. first premolar lingual cusp resembles ……..

A

canine cingulum

21
Q

The only posterior tooth with lingually inclined occlusal table is ………

A

Mand. first premolar

22
Q

The mesial and distal profile of the Mand. first premolar are ………

A

asymmetric

* There is a prominent mesial bulge

23
Q

The Mand. first premolar features a …… on the mesiolingual line angle of the tooth

A

mesiolingual groove (which produces a concavity)

24
Q

The Mand. first premolar occlusal view shows ………

A
  1. a distinct transverse ridge (from the buccal cusp to the lingual cusp)
  2. The mesial marginal ridge is less distinct than the distal
  3. Occlusal profile is diamond shaped, with lingual convergence
25
Q

The Mand. first premolar root is …….

A

relatively round

26
Q

The Mand. second premolar features ….. cusps

A

three (the mesiolingual is larger than the distolingual)

* The lingual cusps are separated by a lingual groove extending from the central pit

27
Q

The Mand. second premolar buccal and lingual cusps are equal in size. T/F??

A

true

28
Q

Occlusal view of the Mand. second premolar shows ……

A

a square outline, with a central pit, and no transverse ridge
* a “Y” profile for three cusped tooth, and an “H” for two cusped ones

29
Q

Of all premolars, the roundest root in cross section is ……..

A

the Mand. second premolar

30
Q

Unlike the Mand. first premolar, the buccal and lingual surfaces of the Mand. second premolar are …….

A

equal (not convergent like the first)

Dental Anatomy (14 decks)

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