Copper content in low copper amalgam is________________?
A. 6%
B. 12-30%
C. 29%
D. 19%
Dental Materials
Which of the following silver amalgam alloy have the maximum strength________________?
Which of the following silver amalgam alloy have the maximum strength________________?
A. Lathe cut
B. Spherical
C. Admixed
D. Single composition
What is the most frequently used restorative material ?
What is the most frequently used restorative material ?
A. Silicate
B. Amalgam
C. Composite
D. Gold
How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________?
How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________?
A. 24 hours
B. 1-2 days
C. 3-5 days
D. 7 days
The percentage of copper in high copper alloy is______________?
The percentage of copper in high copper alloy is______________?
A. 10-12%
B. 0-6%
C. 13-30%
D. 20-30%
What is the working time of amalgam?
What is the working time of amalgam?
A. One to two minutes
B. Three to four minutes
C. Five to six minutes
D. Seven to eight minutes
Advantage of zinc containing amalgam is_______________?
Advantage of zinc containing amalgam is_______________?
A. Better handling property
B. Dimensional Stability
C. Resistance to creep
D. Toxicity to pulp and dentin
Discolouration of silver alloy is due to_____________?
Discolouration of silver alloy is due to_____________?
A. Tarnish
B. Tarnish and corrosion
C. Wet corrosion
D. Dry corrosion
Moisture contamination of amalgam can lead to_____________?
Moisture contamination of amalgam can lead to_____________?
A. Marginal breakdown
B. Shrinkage
C. Delayed expansion
D. increased stresses
In a high copper amalgam the phase, which is eliminated is_______________?
In a high copper amalgam the phase, which is eliminated is_______________?
A. Gamma 1
B. Gamma 2
C. Gamma 1 and 2
D. No phase is eliminated