Cavo surface angle for amalgam resoration is butt joint as____________?

Related Mcqs:

1. 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

2. Butt joint in cementoenamel junctions seen is _________% of cases?

   A. 10%
   B. 30%
   C. 60%
   D. 90%

3. Angle of jaw ( or) skin over angle of mandible is supplied by______________?

   A. Great auricular nerve
   B. Lesser occipital nerve
   C. Greater occipital nerve
   D. Posterior auricular nerve

4. 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

5. 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

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

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

7. 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

8. Once triturated, the Dental amalgam should be condensed with in_____________?

   A. 5 minutes
   B. 6 minutes
   C. 3 minutes
   D. 15 minutes

9. 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

10. Gallium and indium added to Amalgam replace______________?

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