Q

Question 1

The location of proximal walls of class I cavity preparation is 1mm to 1.5mm measured from the external surface of the tooth.
a. True
b. False

Answer 1

B

Question 2

The position of the gingival margin of class II amalgam preparation is dictated primarily by:
a. The thickness of the enamel
b. Aesthetics
c. The extent of carious lesion
d. The location of the gingival margin

Answer 2

C

Question 3

What is the reason for the location of the s-curve?
a. Conserve dentin
b. Conserve enamel rods
c. Conserve the cuspal structure
d. Two of the above

Answer 3

C

Question 4

All four walls of class I amalgam preparation should diverge slightly because divergence prevents undermining of the marginal ridge.
a. Both the statement and the reason are correct and related.
b. The statement is correct, but the reason is not correct.
c. Both the statement and the reason are correct but not related.
d. The statement is not correct, but the reason is correct
e. Neither the statement nor the reason is correct.

Answer 4

D

Question 5

Finish of the enamel margin at the gingival cavosurface on a cavity prepared for amalgam:
a. Accomplished by creating a steep cavosurface bevel
b. Not indicated because of the poor tensile strength of amalgam
C. Accomplished by removing unsupported
enamel rods and prism
d. Not required since no stress is placed
on this region of the restoration

Answer 5

C