Mandibular Premolars

Question 1

Do mandibular first and second premolars resemble each other?

Answer 1

No

Question 2

Which mandibular premolar is usually larger?

Answer 2

2nd

Question 3

How many lobes does the mandibular first premolar develop from?

Answer 3

4

Question 4

How many lobes does the mandibular second premolar usually develop from?

Answer 4

4 or 5

Question 5

Which premolar has a more symmetrical outline, the first or second?

Answer 5

1st

Question 6

Which mandibular premolar has a larger and pointed buccal cusp?

Answer 6

1st

Question 7

Which mandibular premolar resembles a canine from the buccal aspect?

Answer 7

1st

Question 8

Where is the cusp tip located in relation to the long axis on the mandibular first premolar?

Answer 8

The buccal cusp tip is slightly mesial to the long axis on the mandibular first premolar.

Question 9

Does the mandibular first or second premolar more commonly have a single root?

Answer 9

The mandibular first premolar most commonly has a single root

Question 10

What is unique about the root of the mandibular second premolar compared to the first?

Answer 10

The mandibular second premolar has a single root that is larger and longer than the first premolar’s root.

Question 11

Does the mandibular first premolar usually have imbrication lines?

Answer 11

No, the mandibular first premolar usually has no imbrication lines.

Question 12

Which mandibular premolar has a smooth buccal enamel surface with few developmental grooves?

Answer 12

The mandibular first premolar has a smooth buccal surface with few developmental grooves.

Question 13

Which mandibular premolar has a shorter buccal cusp?

Answer 13

The mandibular second premolar has a shorter buccal cusp.

Question 14

Describe the lingual cusp of the mandibular first premolar.

Answer 14

The lingual cusp of the mandibular first premolar is small, non-functional, and does not occlude with maxillary teeth.

Question 15

Which mandibular premolar has most of its occlusal surface visible from the lingual view?

Answer 15

The mandibular first premolar has most of its occlusal surface visible from the lingual view.

Question 16

Which mandibular premolar has a mesiolingual developmental groove?

Answer 16

The mandibular first premolar has a mesiolingual developmental groove.

Question 17

Does the mandibular second premolar have a mesiolingual groove?

Answer 17

No, the mandibular second premolar does not have a mesiolingual groove.

Question 18

How does the crown of the mandibular first premolar tip

Answer 18

The crown of the mandibular first premolar tips lingually.

Question 19

Which mandibular premolar has a buccal cusp centered over the root?

Answer 19

The mandibular first premolar has a buccal cusp centered over the root.

Question 20

Describe the buccal triangular ridge of the mandibular first premolar

Answer 20

The buccal triangular ridge slopes at a 45-degree angle on the mandibular first premolar.

Question 21

How does the marginal ridge of the mandibular first premolar relate to the triangular ridge?

Answer 21

The marginal ridge is nearly parallel to the buccal triangular ridge on the mandibular first premolar.

Question 22

Which mandibular premolar shows a greater amount of occlusal surface?

Answer 22

The mandibular first premolar shows more occlusal surface than the second premolar.

Question 23

Describe the mesial root depression on the mandibular first premolar.

Answer 23

The mandibular first premolar has a shallow root depression on the mesial surface.

Question 24

Is there a root depression on the distal surface of the mandibular first premolar?

Answer 24

Yes, the distal surface of the mandibular first premolar has a less steep root depression.

Question 25

What shape is the occlusal profile of the mandibular first premolar?

Answer 25

The mandibular first premolar has a diamond-shaped occlusal profile

Question 26

How many cusps does the mandibular first premolar have?

Answer 26

The mandibular first premolar has two cusps.

Question 27

How does the mandibular first premolar’s transverse ridge affect the fossae?

Answer 27

A distinct transverse ridge separates the mesial and distal fossae on the mandibular first premolar.

Question 28

Which mandibular premolar is sometimes called “snake eyes” due to restorations?

Answer 28

Restorations on the mandibular first premolar may be called “snake eyes” due to the roundness of the mesial and distal fossae.

Question 29

What are the two forms of the mandibular second premolar?

Answer 29

The mandibular second premolar can have a three-cusp or two-cusp form.

Question 30

Which form of the mandibular second premolar is more common?

Answer 30

The three-cusp type is more common for the mandibular second premolar

Question 31

Describe the cusps of the three-cusp mandibular second premolar.

Answer 31

The three-cusp mandibular second premolar has buccal, mesiolingual, and distolingual cusps.

Question 32

Which cusp is wider and longer on the three-cusp mandibular second premolar?

Answer 32

The mesiolingual cusp is wider and longer than the distolingual cusp on the three-cusp mandibular second premolar

Question 33

What groove separates the two lingual cusps on the three-cusp mandibular second premolar?

Answer 33

A developmental lingual groove separates the two lingual cusps on the three-cusp mandibular second premolar

Question 34

Does the two-cusp mandibular second premolar have a lingual groove?

Answer 34

No, the two-cusp mandibular second premolar does not have a lingual groove

Question 35

Which mandibular premolar’s occlusal table has a larger and more square profile?

Answer 35

The mandibular second premolar’s occlusal table has a larger, square profile, especially in the three-cusp type.

Question 36

What groove pattern does the three-cusp mandibular second premolar typically display?

Answer 36

The three-cusp mandibular second premolar typically has a “Y” groove pattern

Question 37

What is the central pit’s position on the three-cusp mandibular second premolar?

Answer 37

The central pit on the three-cusp mandibular second premolar is toward the distal side.

Question 38

Describe the central groove on the two-cusp mandibular second premolar

Answer 38

The two-cusp mandibular second premolar’s central groove ends at mesial and distal fossae with an “H” or “U” groove shape

Question 39

Which mandibular premolar has more supplemental grooves?

Answer 39

The mandibular second premolar has more supplemental grooves than the first premolar.

Question 40

What happens if there is premature loss of a primary mandibular second molar?

Answer 40

The permanent mandibular first molar may incline and drift mesially, reducing space for the second premolar

Question 41

Which mandibular premolar is least likely to have a depression on the mesial root surface?

Answer 41

The mandibular second premolar is least likely to have a mesial root depression