A. Dissolve the alloy in mercury
B. Coat the alloy particle with mercury
C. Remove excess mercury from the amalgam
D. Dissolve Hg in alloy
Related Mcqs:
- The term trituration means____________?
A. Lysing amalgam alloy
B. Mixing of amalgam alloy and mercury
C. Removal of excess of mercury
D. None of the above - Over-trituration of silver alloy and mercury_______________?
A. Reduces contraction
B. Increases the strength of lathe cut alloy but reduces the strength of spherical alloy amalgam
C. Decreases creep
D. Gives al dull and crumbly amalgam - Which one of the following is not an objective of trituration ?
A. Remove oxides from powder particle surface
B. Keep the amount of gamma-1 or gamma-2 matrix crystals to maximum
C. Pulverize pelletes into particles to aid in attack by mercury
D. Achieve a workable mass of amalgam in minimum time - The effect of trituration on strength in an amalgam restoration depends on______________?
A. Amalgam alloy
B. Trituration time
C. Speed of amalgamator
D. All of the above - Moisture contamination of amalgam can lead to_____________?
A. Marginal breakdown
B. Shrinkage
C. Delayed expansion
D. increased stresses - Discolouration of silver alloy is due to_____________?
A. Tarnish
B. Tarnish and corrosion
C. Wet corrosion
D. Dry corrosion - Frozen slab technique is applicable to_____________?
A. Zinc phosphate cement
B. Glass Ionomer cement
C. Zinc oxide Eugenol cement
D. Resin cement - Palladium is added to polyvinyl siloxane to_____________?
A. Act as a scavenger
B. Helps as surfactant
C. Acts as plasticizer
D. Acts as a catalyst - Glossy smooth margins of a casting are due to_____________?
A. Shrinkage of alloy on cooling
B. Investment breakdown
C. Incomplete wax elimination
D. Incomplete gas elimination - Subsurface porosity is due to_____________?
A. Thermal changes
B. Thickness of the resin
C. Lack of temperature
D. Packing past the dough stage
