Well premeasured capsules of amalgam can release mercury vapour during_______________?

Related Mcqs:

1. The highest mercury concentration in amalgam filling is found_____________?

   A. At the margin of the restoration
   B. In the centre of the restoration
   C. In the deepest part of the restoration
   D. None of the above

2. Increase in the residual mercury in silver amalgam filling can_____________?

   A. Cause fracture of the filling
   B. Tarnish and corrosion
   C. Increase the strength
   D. Decrease condensation pressure

3. 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

4. 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%

5. Hypoplastic defects in permanent central and lateral incisors are likely to result due to severe illness or other factors during_______________?

   A. First nine month of life
   B. First two years of life
   C. First month of life
   D. Two or three years of life

6. The tarnished layer of silver amalgam consists of________________?

   A. Sulphides of silver
   B. Oxides of tin
   C. Chlorides of tin
   D. All of the above

7. Gallium and indium added to Amalgam replace______________?

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

8. Co-efficient of Thermal exansion of amalgam is______________?

   A. 6.6 a (ppm k-1)
   B. 11.4 a (ppm k-1)
   C. 14.0 a (ppm k-1)
   D. 25.0 a (ppm k-1)

9. Amalgam means_____________?

   A. A metallic powder composed of silver, tin, copper and zinc
   B. An alloy of two or more metals one of which is mercury
   C. An alloy of two or more metals that have been dissolved in each other in the molten state
   D. A metallic substances in powder or tablet from that is mixed with mercury

10. What is common in amalgam and ceramics ?

    A. More compressive strength but less tensile strength
    B. More compressive strength and tensile strength
    C. Less compressive strength but more tensile strength
    D. Less compressive strength and tensile strength