Premolars

Question 1

What is the palatal surface of the upper 4 like compared to the buccal surface

Answer 1

Slightly lower and much narrower

Question 2

What is the distal surface of the upper 4 like

Answer 2

Convex

Question 3

What is the mesial surface of the upper 4 like

Answer 3

Convex in the occlusal half and concave in the cervical half

Question 4

What is a canine fossa

Answer 4

The con cavity on the mesial surface of the upper 4

It contacts the distal surface of the upper canine

Question 5

What are distinguishing features of the upper first premolar

Answer 5

Well-defined groove in the enamel of the mesial marginal ridge
This groove is in alignment with the developmental depression on the mesial surface of the root and is continuous with the central groove of the occlusal surface

Question 6

What does the occlusal surface of the upper 4 appear like

Answer 6

Roughly oval, buccal cusp is wider and higher than lingual cusp,
Has a marked mesial displacement of the lingual cusp

Question 7

What are the two cusps on the upper 4 separated by

Answer 7

A sharp fissure running mesio-distally which does not reach the distal marginal ridge but often extends across the mesial marginal ridge onto the mesial surface

Question 8

What marginal ridge is more cervical on the upper 4

Answer 8

Distal

Question 9

How many roots does the the upper 4 have

Answer 9

2 roots - one buccal and open lingual

Question 10

What is the buccal surface of the upper 5 like in comparison to the upper 4

Answer 10

Smaller

Question 11

Why are the 2 cusps of the upper 5 the same height

Answer 11

The reduction in size of the buccal cusp

Question 12

What is the mesial surface of the upper 5 like

Answer 12

No development depression and is convex

Question 13

What marginal ridge is more cervical on the upper 5

Answer 13

Distal

Question 14

What separates the cusps on the upper 5

Answer 14

A sharp fissure running mediocre-distally which does not reach the marginal ridges

Question 15

What is the occlusal surface of the upper 5 like compared to the upper 4

Answer 15

More symmetrical with only slight mesial displacement of the lingual cusp

Question 16

What is the buccal surface of the lower 4 like

Answer 16

Inclined strongly lingually so that its tip lies almost above the centre of the tooth

Question 17

What is the lingual surface of the lower 4 like

Answer 17

Slightly narrower and much longer than the buccal surface

Question 18

What is the occlusal surface on the lower 4 like

Answer 18

Almost round, canine-like, greater difference in buccal and lingual cusps height and has a small groove running from the mesial pit onto the mesio-lingual surface

Question 19

What is the crown of the lower 5 like

Answer 19

Much larger than that of the first

Question 20

What is the occlusal surface of the lower 5 like

Answer 20

The lingual cusp is much larger than that os the first and is displaced mesially

Question 21

How many cusps does the lower 5 have

Answer 21

Possibly 2 but the mesial is larger

Question 22

Which is the bigger fossa on the lower 5

Answer 22

Distal

Question 23

What marginal ridge is more cervical on the lower 4

Answer 23

Mesial

Question 24

What marginal ridge is more cervical on the lower 5

Answer 24

Distal

Question 25

What does unilateral mean

Answer 25

Affecting only one side

Question 26

What does bilateral mean

Answer 26

Affecting both sides

Question 27

What does ipsilateral mean

Answer 27

Belonging to or occurring on the same side of the body

Question 28

What does contralateral mean

Answer 28

Occurs on the opposite side of the body

Question 29

What is significant about the lingual cusp of the upper 4

Answer 29

It has marked mesial displacement