Mandibular second premolar

Question 1

The height of the lingual cusp is taller in this tooth than the height of lingual cusp in mandibular 1st premolar. T/F

Answer 1

True

Question 2

How many cusps can be present?

Answer 2

2 (B and L) or 3 cusps (B, ML, DL). ML is usually the larger cusp on the lingual. If there is only one cusp on the lingual then it is located towards mesial

Question 3

If 3 cusps, what sturucture separates them?

Answer 3

Lingual groove

Question 4

Describe the shape of the occlusal outline.

Answer 4

Round shape, shorted BL length than the mandibular 1st premolar.

Question 5

The mesial marginal ridge is closer to the cervical line than the distal marginal ridge. T/F

Answer 5

False, the distal marginal ridge is closer to the cervical line, like it is usually in the posterior teeth. Unlike the mandibular 1st premolar.

Question 6

Mesial and distal HOC

Answer 6

Middle and occlusal third, the distal HOC is closer to the cervical line

Question 7

Buccal HOC

Answer 7

Middle and cervical third

Question 8

Lingual HOC

Answer 8

Middle and occlusal third

Question 9

Define the anatomy

Answer 9

More rounded than the mandibular first premolar andless defined buccal anatomy

Question 10

When 3 cusps, what is the shape of the occlusal surface

Answer 10

Y shape

Question 11

When 2 cusps what is the shape of the occlusal surface

Answer 11

U or H shape

Question 12

What forms the Y shaped occlusal surface

Answer 12

Formed by the mesial and distal grooves and the lingual grooove

Question 13

At what structure do the three groove in the 3 cusped tooth connect.

Answer 13

Central pit