Advantage of 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. 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

3. Cause of expansion in zinc containing amalgam is_____________?

   A. Zinc and water
   B. Water
   C. Hydrogen
   D. Nascent oxygen

4. Advantage of zinc phosphate over GIC is______________?

   A. High compressive strength
   B. Tensile strength
   C. High modulus of elasticity
   D. Diametral strength

5. The chief advantage of zinc phosphate cement is its___________?

   A. Good compressive strength
   B. Film thickness
   C. Lack of irritation
   D. Low solubility

6. 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

7. Amalgam restorations give the best clinical service when the residual mercury content is_______________?

   A. 38-42%
   B. 48-52%
   C. 58-62%
   D. 68-72%

8. 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

9. Which of the following are characteristic feature of high copper amalgam alloy ?

   A. Low compressive strength
   B. High marginal breakdown
   C. Less marginal #
   D. High creep

10. Which is not true about high copper amalgam alloys______________?

    A. Low tensile and compressive strength
    B. Low Hg: Alloy ratio
    C. High tensile strength
    D. Low creep