Lecture 9

Question 1

The maxillary second molar typically erupts:

A. Before the mandibular second molar
B. After the mandibular second molar
C. At the same time as the mandibular second molar
D. None of the above

Answer 1

B. After the Mandibular second molar

Question 2

The crown shape of a maxillary second molar is:

A. A cuboidal
B. A pyramid
C. A cone
D. A trapezoid

Answer 2

A. A cuboidal

Question 3

The occlusal outline of the maxillary second molar on the buccal/vestibular aspect is:

A. A circle
B. A triangle
C. A “W” shape
D. A square

Answer 3

C. A W shape

Question 4

The number of roots typically found in a maxillary second molar is:

A. 1
B. 2
C. 3
D. 4

Answer 4

C. 3

Question 5

The most common number of cusps on a maxillary third molar is:

A. 2
B. 3
C. 4
D. 5

Answer 5

C. 4

Question 6

The mandibular second molar typically erupts:

A. Before the mandibular first molar
B. After the mandibular first molar
C. At the same time as the mandibular first molar
D. None of the above

Answer 6

A. Before the Mandibular first molar

Question 7

The number of roots typically found in a mandibular second molar is:

A. 1
B. 2
C. 3
D. 4

Answer 7

B. 2

Question 8

When does the maxillary second molar typically erupt?
• A) 6 years after the first molar
• B) 12 years after the first molar
• C) 18-24 years
• D) 24-30 years

Answer 8

B) 12 years after the first molar

Question 9

What shape is the crown of the maxillary second molar from the buccal aspect?
• A) Cuboidal
• B) Trapezoidal
• C) Rectangular
• D) Circular

Answer 9

B) Trapezoidal

Question 10

In the maxillary second molar, what is the primary direction of the occlusal outline’s “W” shape?
• A) Mesial V > Distal V
• B) Distal V > Mesial V
• C) Buccal > Lingual
• D) Lingual > Buccal

Answer 10

A) Mesial V > Distal V

Question 11

Which groove is NOT present in the occlusal aspect of the maxillary second molar?
• A) Mesio-central groove
• B) Centro-buccal groove
• C) Distal-lingual groove
• D) Distal-buccal groove

Answer 11

D) Distal-buccal Groove

Question 12

How many cusps does the maxillary third molar most frequently have?
• A) 2
• B) 3
• C) 4
• D) 5

Answer 12

B) 3

Question 13

How many roots does the mandibular second molar have?
• A) 1
• B) 2
• C) 3
• D) 4

Answer 13

C) 3

Question 14

What is the primary shape of the maxillary second molar crown from the occlusal aspect?
• A) Quadrilateral
• B) Circular
• C) Oval
• D) Triangular

Answer 14

A) Quadrilateral

Question 15

Which characteristic is NOT true about the mandibular second molar’s occlusal aspect?

A) It has a rectangular quadrilateral shape.
B) It has four cusps.
C) It has two cross grooves.
D) It has a rounded buccal outline.

Answer 15

D) it has a rounded buccal outline