Lecture 5 Maxillary First & Second Premolar

Question 1

At what age does the maxillary first premolar typically erupt?
a) 7 years
b) 9 years
c) 10 years
d) 12 years

Answer 1

b) 9 years

Question 2

Which aspect of the maxillary first premolar crown is described as having a parallelepiped right-angled shape?
a) Buccal
b) Occlusal
c) Lingual
d) Mesial

Answer 2

b) Occlusal

Question 3

The maxillary first premolar’s buccal aspect has a cervical outline that resembles a:
a) Straight line
b) Hoop arch
c) Square
d) V-shape

Answer 3

b) Hoop arch

Question 4

On the maxillary first premolar’s occlusal aspect, how do the mesial and distal outlines differ?
a) Both are flat and large
b) Mesial is convex, distal is flat
c) Mesial is larger and flat, distal is smaller and convex
d) Both are equal in size and convex

Answer 4

c) Meisal is larger and flat, distal is smaller and convex

Question 5

How many cusps does the maxillary first premolar have on its occlusal surface?
a) 1
b) 2
c) 3
d) 4

Answer 5

b) 2

Question 6

Which of the following is TRUE about the lingual cusp of the maxillary first premolar?
a) It touches the occlusal plane
b) It does not touch the occlusal plane
c) It is larger than the buccal cusp
d) It is the only cusp with a triangular shape

Answer 6

b) it does not touch the occlusal plane

Question 7

What is a common morphological feature of the maxillary first premolar root?
a) Round cross-section
b) Flattened M-D
c) Triangular in shape
d) Thin with no grooves

Answer 7

b) Flattened M-D

Question 8

The maxillary second premolar generally has how many roots?
a) 1
b) 2
c) 3
d) 4

Answer 8

a) 1

Question 9

Which of the following statements is TRUE about the maxillary second premolar?
a) The lingual cusp is shorter than the buccal cusp
b) It has a crown that is larger in volume than the first premolar
c) It has a smaller root compared to the first premolar
d) The crown axis does not follow the root axis

Answer 9

b) it has a crown that is larger in volume than the first premolar

Question 10

In both the maxillary first and second premolars, what common clinical issue is frequently observed?
a) Frequent decay
b) Severe periodontal disease
c) No esthetic role
d) Thin enamel on the occlusal surface

Answer 10

a) frequent decay

Question 11

What is the shape of the maxillary first premolar’s occlusal edge on the buccal/vestibular aspect?
a) Straight
b) U-shape
c) V-shape
d) S-shape

Answer 11

c) V-shape

Question 12

On the maxillary first premolar, which outline is longer and flatter on the buccal/vestibular aspect?
a) Mesial
b) Distal
c) Occlusal
d) Cervical

Answer 12

a) mesial

Question 13

The maxillary first premolar’s cervical outline on the buccal aspect forms a:
a) Square shape
b) Hoop arch with convexity towards the apex
c) V-shape with convexity towards the cusp
d) Flat line across the face

Answer 13

b) Hoop arch with convexity towards the apex

Question 14

On the maxillary first premolar’s lingual/palatal aspect, how do the mesial and distal outlines compare?
a) The mesial outline is shorter and convex, while the distal is longer and flat
b) The mesial outline is longer and flatter, while the distal is shorter and more convex
c) Both the mesial and distal outlines are equal in length
d) Both outlines converge towards the occlusal edge

Answer 14

b) the mesial outline is longer and flatter, while the distal is shorter and more convex

Question 15

The relief on the buccal aspect of the maxillary first premolar shows maximum convexity in which directions?
a) Cervico-occlusal direction, middle third & Mesio-distal direction, cervical third
b) Cervico-occlusal direction, cervical third & Mesio-distal direction, middle third
c) Cervico-occlusal direction, occlusal third & Mesio-distal direction, middle third
d) Cervico-occlusal direction, middle third & Mesio-distal direction, occlusal third

Answer 15

b) cervico-occlusal direction, 1/3 cervical, Mesio-distal direction, 1/3 midway

Question 16

On the lingual/palatal aspect of the maxillary first premolar, the occlusal edge forms a:
a) Straight line
b) V-shape, more rounded than on the buccal aspect
c) U-shape
d) Sharp triangular point

Answer 16

b) V- shape more rounded

Question 17

The relief on the lingual/palatal aspect of the maxillary first premolar shows maximum convexity in which directions?
a) Cervico-occlusal direction, middle third & Mesio-distal direction, cervical third
b) Cervico-occlusal direction, cervical third & Mesio-distal direction, middle third
c) Cervico-occlusal direction, middle third & Mesio-distal direction, cervical third
d) Cervico-occlusal direction, occlusal third & Mesio-distal direction, middle third

Answer 17

c) Cervico-occlusal direction, middle third & Mesio-distal direction, cervical third

Question 18

The distal face of the maxillary first premolar crown is characterized by which of the following?
a) It is similar in shape to the mesial face but smaller and more convex.
b) It is larger and flatter compared to the mesial face.
c) It is completely flat with no convexity.
d) It has a distinct concavity along the occlusal third.

Answer 18

a) similar in shape to mesial but smaller and more convex

Question 19

On the occlusal aspect of the maxillary first premolar, which feature is characteristic of the cusps?
a) The buccal cusp is larger and sharper than the lingual cusp
b) Both cusps are equal in size and shape
c) The lingual cusp is larger and sharper than the buccal cusp
d) The occlusal surface has no distinct cusps

Answer 19

a) The buccal cusp is larger and sharper than the lingual cusp

Question 20

The mesial face of the maxillary first premolar crown shows which of the following characteristics?
a) A convex buccal outline and a convex lingual outline
b) A well-expressed V-shape slope at the occlusal edge
c) A flat mesial outline that curves towards the distal
d) A deep concavity at the occlusal third

Answer 20

a) a convex buccal outline and a convex lingual outline

Question 21

On the occlusal aspect of the maxillary first premolar, which of the following features is present?
a) Two cusps with one larger than the other
b) A flat occlusal surface without any fossae
c) An absence of ridges and fossae
d) Three distinct fossae

Answer 21

a) two cusps with one larger than the other