Second premolar

Question 1

1.

Answer 1

not present in primary dentition + is permanent successor to the deciduous second molar

Question 2

2.

Answer 2

has occlusal surface arranged as two cusps like first premolars

Question 3

3.

Answer 3

cusps are of equal height in all

Question 4

4.

Answer 4

mesial + distal edges are raised as marginal ridges

Question 5

5.

Answer 5

upper is usually slightly smaller than first premolar

Question 6

6.

Answer 6

lower is usually slightly larger than first premolar

Question 7

7.

Answer 7

single root, apex sometimes curves distally. root of apex can sometimes lie very close to floor of maxillary antrum

Question 8

8.

Answer 8

functions are to:
assist canine to pierce + tear food (cusps)
assist molars to grind food (occlusal surface)
help maintain the shape of the mouth

Question 9

9.

Answer 9

lowers are sometimes congenitally absent

Question 10

10.

Answer 10

can become impacted in either arch, following early loss of deciduous molar + the eruption of permanent first molars so the space is lost