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Restorative dentistry > Maxillary Premolars (permanent) > Flashcards

Maxillary Premolars (permanent) Flashcards

1
Q

Universal number for maxillary first premolars

A

5 & 12

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2
Q

What proximal geometric shape does the first permanent maxillary molar have? Tapers which way?

A

Trapezoidal (tapers occlusally)

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3
Q

What proximal geometric shape does each maxillary posterior tooth have?

A

Trapezoidal (tapers cervically)

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4
Q

What geometrical shape from the occlusal view does the permanent maxillary first premolar have?

A

Hexagonal shape

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5
Q

How many developmental lobes does the permanent maxillary first premolar have? What are their names?

A

4 development lobes (mesiobuccal, distobuccla, mesiolingual, distolingual)

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6
Q

How many cusps does thepermanent maxillary first premolar have?

A

2 (buccal & lingual)

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7
Q

Which cusp is bigger on a permanent maxillary first premolar?

A

F > L (but relatively same in size when compared to mandibular first premolar)

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8
Q

What is the primary function of permanent maxillary first premolar?

A

To assist canine in tearing & piercing

essentially a grinding tooth

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9
Q

When is the initial calcification, enamel competition, eruption, & root competition of permanent maxillary first premolar?

A

initial calcification 1.5 to 1.75 years
enamel completion 5 - 6 y.
eruption 10 - 11 y.
root completion 12 - 13 y.

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10
Q

Which anterior tooth does the permanent maxillary first premolar resemble?

A

Canine

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11
Q

Where is the Facial-HOC on a permanent maxillary first premolar?

A

Cervical Third

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12
Q

True/False –> the Occlusal - Cervical Dimension form the facial view of the permanent maxillary first premolar is longer/greater than the maxillary 2nd premolar?

A

True

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13
Q

From the facial view, the mesial-HOC of the permanent maxillary first premolar is located where?

A

Mesial-HOC is at the occlusal-middle thirds

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14
Q

How doe the Mesial and Distal anatomy compare from the facial view of the permanent maxillary first premolar?

A

Mesial outline has a convexity at HOC and concavity cervically.
Distal outline has greater convexity and less of a concavity.

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15
Q

In which direction does the buccal cusp tip of the permanent maxillary first premolar point from a facial view relative to the midline of the root?

A

Cusp tip points distally from the midline of the root

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16
Q

Which buccal cusp ridge is longer/shorter on a permanent maxillary first premolar?

A

Mesialbuccal cusp ridge is longer
Distobuccal cusp ridge is shorter
(opposite for maxillary canine)

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17
Q

In which direction does the lingual cusp tip of the permanent maxillary first premolar point from a lingual view relative to the midline of the root?

A

Cusp tip points mesially from the midline

lingual cusp is offset to mesial

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18
Q

Where is the lingual-HOC for all posterior teeth?

A

Middle third

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19
Q

Where is the lingual - HOC for the permanent maxillary first premolar?

A

Middle third

20
Q

Which cusp of the all maxillary premolars is the shortest (OC)?

A

Lingual Cusp of the first permanent maxillary premolar

21
Q

Are the Buccal(facial) & lingual cusps of the first permanent maxillary premolar centered over the root trunk or are they offset facially / lingually from mesial view?

A

Facial & Lingual Cusps of the first permanent maxillary premolar are centered over the root trunk from the mesial view

22
Q

Is there strong mesial marginal groove visible on a first permanent maxillary premolar?

A

Yes, strong mesial marginal groove

23
Q

What is one distinguishing or unique feature of the first permanent maxillary premolar from the mesial view in relationship to concavity?

A

First permanent maxillary premolar have a strong mesial concavity from root trunk to cervical portion of the crown.

24
Q

Where specifically is the mesial-HOC from the mesial view of the first permanent maxillary premolar?

A

Mesial HOC is facial to the midline (because buccal cusp is slightly larger than lingual cusp)

25
Q

Lingual cusp of maxillary first premolar is offset mesially and buccal cusp is offset distally

A

…

26
Q

which two teeth have mesial marginal groove?

A

Mandibular and maxillary first premolar

27
Q

Compare the mesial and distal marginal ridges on a maxillary first premolar

A

Distal marginal ridge on a maxillary first premolar is more cervical thus have a shorter OC distance –> more occlusal surface is visible from distal view than mesial

28
Q

From which view (mesial / distal) of a maxillary first premolar can one see more of the occlusal table

A

Form distal view (why?)

29
Q

compare the distal and mesial contact area of a mandibular first premolar

A

distal contact area is slightly more cervical and facial than mesial on a maxillary first premolar

30
Q

Mesial marginal ridge is shorter / longer than distal marginal ridge for maxillary first premolar.

A

Mesial marginal ridge on a maxillary first premolar is shorter than distal marginal ridge

31
Q

Mesial contact area is more lingual / facial than distal on a maxillary first premolar

A

Mesial contact area is more lingual than distal on a maxillary first premolar.

32
Q

which tooth has the deepest central groove of all posterior teeth?

A

maxillary first premolar

33
Q

Which angle is acute and which angle is 90 degrees on a maxillary first premolar.

A

maxillary first premolar distal buccal ridge - distal marginal ridge is an acute angle
mesial buccal ridge - mesial marginal ridge

34
Q

What is Root Type I and to which tooth does it belong to?

A

Maxillary first premolar
Cervical root Cross Section = kidney or bean shape
Still has two canals (Facial and Lingual)

35
Q

What is Root Type II and to which tooth does it belong to?

A

Maxillary first premolar
Most common form
short root trunk
cervical cross section is bean shaped

36
Q

What is Root Type III and to which tooth does it belong to?

A 
Maxillary first premolar
Longer Root trunk
Laminated Root
Mid-root cross section is hourglass
cervical cross section is bean shaped
37
Q

In which tooth is trifurcation possible?

A

Trifurcation is possible in Maxillary first premolar (2 buccal + 1 lingual)

38
Q

Which tooth is smaller / bigger? Maxillary first or second premolar

A

Maxillary first premolar is bigger

39
Q

Which tooth is more rounded / angular ? Maxillary first or second premolar?

A

Maxillary first is more angular

Maxillary second is more rounded

40
Q

Are the mesial and distal pits closer or farther apart in maxillary first premolar?

A

mesial and distal pits are closer together due to shoot central groove on a Maxillary second premolar

41
Q

Will one see more or less supplemental grooves in maxillary second premolar?

A

There are more supplemental grooves in maxillary second premolar than maxillary first premolar

42
Q

IS there mesial concavity or mesial marginal groove present on Maxillary second premolar

A

No

43
Q

Which two pair teeth have symmetry on both side?

A

Mandibular central incisors & maxillary second premolars

44
Q

Which premolars are most symmetrical?

A

Maxillary second premolars

45
Q

DO maxillary second premolar root exhibit depressions?

A

No, only maxillary first premolar (remember, maxillary second premolar exhibit symmetry so they can’t have any depressions)

Restorative dentistry (6 decks)

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