Increase in the residual mercury in silver amalgam filling can_____________?

Related Mcqs:

1. A patient who has had a recent amalgam filling in the upper teeth has a gold filling in the lower teeth, the patient complains of pain. The reason for this can be mainly_____________?

   A. Improper amalgam filling
   B. Pulp exposure
   C. Galvanism
   D. None of the above

2. 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

3. 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

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

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

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. Well premeasured capsules of amalgam can release mercury vapour during_______________?

   A. Mulling
   B. Carving
   C. Condensation
   D. Trituration

8. 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

9. Which phase provides maximum strength in hardened mercury/silver alloy ?

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

10. The solid solution of silver and mercury is called_______________?

    A. y1
    B. y2
    C. B1
    D. y