Cause of expansion in zinc containing amalgam is_____________?

Related Mcqs:

1. In non zinc containing dental amalgam alloy the percentage of zinc present is______________?

   A. Less than 0.02%
   B. Less than 0.1%
   C. Less than 0.01%
   D. None of the above

2. Advantage of zinc containing amalgam is_______________?

   A. Better handling property
   B. Dimensional Stability
   C. Resistance to creep
   D. Toxicity to pulp and dentin

3. 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

4. The largest component of amalgam alloy is_____________?

   A. Silver
   B. Tin
   C. Zinc
   D. Copper

5. The principle application of zinc phosphate cement is_____________?

   A. In final cementation
   B. As temporary cementation
   C. As a temporary filling material
   D. It has less occlusal wear

6. The major component of zinc phosphate cement is_____________?

   A. Zinc oxide
   B. Phosphoric acid
   C. Zinc
   D. None of the above

7. The ADA specification No 1 for composition of amalgam alloy recommends______________?

   A. 65% silver, 32% tin and 3% copper
   B. 49% silver, 32% tin and 19% cooper
   C. 65% silver, 29% tin and 5-6% copper
   D. None of the above

8. Gallium and indium added to Amalgam replace______________?

   A. Silver
   B. Tin
   C. Mercury
   D. Zinc

9. Amalgam achieves 70% of the strength by____________?

   A. hours
   B. 4 hours
   C. 8 hours
   D. 16 hours

10. Setting time of Amalgam is best controlled by _______________?

    A. Using spherical particles
    B. Lathe cut alloy
    C. Altering Hg-Alloy ratio
    D. Trituration time