Gallium and indium added to Amalgam replace______________?

Related Mcqs:

1. Indium in metal alloys_______________?

   A. Improve bonding
   B. Harden the metal ceramic Ag-Pd alloy
   C. Both A and B
   D. None of the above

2. In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to________________?

   A. Improve bonding
   B. Decrease porosity
   C. They react with the porcelain opaque layer, which masks the metal
   D. Improves the thermal expansion between the metal and porcelain

3. Moisture contamination of amalgam can lead to_____________?

   A. Marginal breakdown
   B. Shrinkage
   C. Delayed expansion
   D. increased stresses

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

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

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. By increasing the percentage of which metal, the strength and hardness of amalgam increases_____________?

   A. Ag
   B. Zn
   C. Cu
   D. Hg

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