Moisture contamination of amalgam can lead to_____________?

Related Mcqs:

1. 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

2. 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

3. Which of the following silver amalgam alloy have the maximum strength________________?

   A. Lathe cut
   B. Spherical
   C. Admixed
   D. Single composition

4. Mercury rich condition in a slow setting amalgam alloy system in a resoration in______________?

   A. Accelerated corrosion
   B. Fracture of the restoration
   C. Merginal damage
   D. All of the above

5. Which of the following does not occur in High Copper Amalgam ?

   A. Electrochemical Corrosion
   B. Chemical Corrosion
   C. Penetrating Corrosion
   D. Corrosion does not occur at all

6. For dental amalgam, the elastic modulus and tensile strength is______________?

   A. 40 Gpa and 60 – 100 Mpa
   B. 21 Gpa and 27 – 55 Mpa
   C. 350 Gpa and 10 – 120 Mpa
   D. 360 Gpa and 125 – 130 Mpa

7. Outstanding clinical performance of dental amalgam restoration is related to its____________?

   A. Compressive strength
   B. Tensile strength
   C. Corrosion
   D. Creep

8. 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

9. 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%

10. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________?

    A. 80 Mpa
    B. 140 Mpa
    C. 260 Mpa
    D. 510 Mpa