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Morpho > Lecture 6 Mandibular 1st And 2nd Premolar > Flashcards

Lecture 6 Mandibular 1st And 2nd Premolar Flashcards

1
Q

At what age does the mandibular first premolar typically erupt?
a) Approximately 7-8 years
b) Approximately 9-10 years
c) Approximately 11-12 years
d) Approximately 13-14 years

A

b) 9-10 years

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2
Q

What tooth does the mandibular first premolar replace?
a) First molar
b) Canine
c) Second molar
d) Second premolar

A

a) First molar

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3
Q

What shape describes the crown of the mandibular first premolar?
a) Cylindrical and globular
b) Conical and flat
c) Cuboidal and elongated
d) Triangular and sharp

A

a) Cylindrical and globular

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4
Q

On the buccal/vestibular aspect of the mandibular first premolar, the cervical outline is described as having:
a) A flat profile
b) A concave profile
c) A hoop arch convexity towards the apex
d) A rounded profile

A

c) hoop arch convexity towards apex

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5
Q

What characteristic does the occlusal edge of the mandibular first premolar have?
a) A U-shape
b) A rounded edge
c) A V-shape
d) A straight edge

A

c) V-shape

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6
Q

How many cusps does the mandibular first premolar typically have?
a) One
b) Two
c) Three
d) Four

A

b) Two

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7
Q

On the lingual/palatal aspect of the mandibular first premolar, where is the maximum convexity located for both directions?

a) M-D direction at the mesial 1/3 and C-O direction at the middle 1/3
b) M-D direction at the cervical 1/3 and C-O direction at the cervical 1/3
c) M-D direction at the middle 1/3 and C-O direction at the cervical 1/3
d) M-D direction at the mesial 1/3 and C-O direction at the cervical 1/3

A

a) M-D direction at the mesial 1/3 and C-O direction at the middle 1/3

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8
Q

The mesial face of the mandibular first premolar crown has which of the following outlines?
a) Flat buccal and concave lingual
b) Convex buccal and convex lingual
c) Convex buccal and flat lingual
d) Flat buccal and convex lingual

A

b) Convex buccal and convex lingual

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9
Q

What is the root canal characteristic of the mandibular first premolar?
a) Conical root with multiple canals
b) Conical root with a single canal
c) Flattened root with multiple canals
d) Flat root with two canals

A

b) conical root with a single canal

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10
Q

What is the eruption time for the mandibular second premolar?

A) 9-10 years
B) 10-11 years
C) 11 years
D) 12-13 years

A

C) 11 years

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11
Q

How many lobes does the mandibular second premolar typically have?

A) 1-2 lobes
B) 2-3 lobes
C) 3-4 lobes
D) 4-5 lobes

A

B) 2-3 lobes

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12
Q

In the mandibular second premolar with 3 lobes, what is the relationship between the buccal (B) and lingual (L) components of the mesiofacial (MF) and distofacial (DF) lobes?

A) Mesiofacial has a greater buccal portion than distofacial.
B) Distofacial has a greater buccal portion than mesiofacial.
C) Both lobes have equal buccal and lingual portions.
D) The lingual portion is larger in both lobes.

A

B) Distofacial has a greater buccal portion than mesiofacial.

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13
Q

What is the shape of the occlusal groove in a mandibular second premolar with 3 lobes?

A) U-shaped
B) Y-shaped
C) W-shaped
D) V-shaped

A

B) Y-shaped

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14
Q

In a mandibular second premolar with 2 lobes, which lobe appears more concave?

A) Buccal
B) Lingual
C) Mesial
D) Distal

A

B) Lingual

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15
Q

What is the distinguishing feature of the occlusal aspect of the mandibular second premolar with 3 lobes?

A) It has a circular outline
B) The buccal cusp is larger than the lingual cusps
C) It has no grooves or ridges
D) The lingual cusps are larger than the buccal cusps

A

B) the buccal cusp is larger than the lingual cusp

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16
Q

In the mandibular second premolar with 3 lobes, which fossa is present?

A) Mesial fossa
B) Distal fossa
C) Central fossa
D) No fossa present

A

C) Central

17
Q

How does the buccal face of the mandibular second premolar compare to that of the mandibular first premolar?

A) It is smaller than the first premolar
B) It is the same or slightly larger than the first premolar
C) It is significantly smaller than the first premolar
D) It is the same in size but more convex

A

B) it is the same or slightly larger

18
Q

What is the root characteristic of the mandibular second premolar?

A) It has two roots
B) It has a conical root with a single root canal
C) It has a fused root
D) It has multiple root canals

A

B) it has a conical root with a single root canal

19
Q

On the proximal face of the mandibular second premolar with 2 lobes, what is the occlusal shape?

A) U-shaped
B) V-shaped
C) W-shaped
D) M-shaped

A

B) V-shaped

20
Q

In the mandibular second premolar with 3 lobes, what is the shape of the occlusal outline? (Lingual)

A) U-shaped
B) W-shaped
C) V-shaped
D) Circular

A

W-shaped

Morpho (11 decks)

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