Chapter 2 J: Dental Amalgam

Question 1

Identify the incorrect statement?
A: An alloy is a union of two or more metals

B: An amalgam is an alloy in which mercury appears as a constituent

C: Dental amalgam is an alloy of mercury with silver, tin, and varying amounts of
copper, zinc and other minor constituents

D: All are correct

Answer 1

D

Question 2

identify the incorrect statement?
A: Silver reduces the shrinkage and setting time of amalgam

B: An excessive amount of Ag can lead to an excessive expansion of the material

C: Tin decreases setting time

D: All are correct

Answer 2

C

Question 3

Identify the incorrect statement?
A: Amalgam suffers dimensional changes within the first year, when it becomes stable

B: During the first 20 minutes, amalgam suffers primary contraction

C: After the contraction, amalgam starts to crystalize

D: All are correct

Answer 3

D

Question 4

What is the best advantage of amalgam?
A: aesthetics
B: resistance to compression
C: biocompatibility
D: all of the above

Answer 4

B

Question 5

Identify the incorrect statement?
A: Amalgam suffers dimensional changes within the first year, when it becomes stable

B: During the first 30 minutes, amalgam suffers primary contraction

C: After the contraction, amalgam starts to crystalize

D: All are correct

Answer 5

B

Question 6

identify the incorrect statement?
A: Silver reduces the shrinkage and setting time of amalgam

B: An excessive amount of Ag can lead to an excessive expansion of the material

C: Tin increases setting time

D: All are correct

Answer 6

D