During amalgamation, trituration is done to_____________?

Related Mcqs:

1. 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

2. 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

3. 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

4. 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

5. Moisture contamination of amalgam can lead to_____________?

   A. Marginal breakdown
   B. Shrinkage
   C. Delayed expansion
   D. increased stresses

6. Discolouration of silver alloy is due to_____________?

   A. Tarnish
   B. Tarnish and corrosion
   C. Wet corrosion
   D. Dry corrosion

7. Frozen slab technique is applicable to_____________?

   A. Zinc phosphate cement
   B. Glass Ionomer cement
   C. Zinc oxide Eugenol cement
   D. Resin cement

8. 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

9. 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

10. Subsurface porosity is due to_____________?

    A. Thermal changes
    B. Thickness of the resin
    C. Lack of temperature
    D. Packing past the dough stage