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

Related Mcqs:

1. 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

2. 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

3. 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

4. The gold alloys used for casting contain at least…. percent of precious metal according to ADA specification number 5________________?

   A. 55
   B. 65
   C. 75
   D. 85

5. ADA specification number of gypsum products are described under____________?

   A. 1
   B. 4
   C. 12
   D. 25

6. The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?

   A. 19
   B. 20
   C. 21
   D. 26

7. Materials which has high compressive strength and low tensile strength is classified with property of________________?

   A. Ductility
   B. Brittleness
   C. Malleability
   D. Resilient

8. 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

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

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

10. 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