The effect of trituration on strength in an amalgam restoration depends on______________?

Related Mcqs:

1. Outstanding clinical performance of dental amalgam restoration is related to its____________?

   A. Compressive strength
   B. Tensile strength
   C. Corrosion
   D. Creep

2. The cavity varnish applied reduces post operative sensitivity in amalgam restoration by____________?

   A. Decreasing conduction of heat to pulp
   B. Minimize marginal leakage around restoration
   C. By altering the chemical composition of restoration materials
   D. By preventing penetration of corrosion products into the dentinal tubules

3. The term trituration means____________?

   A. Lysing amalgam alloy
   B. Mixing of amalgam alloy and mercury
   C. Removal of excess of mercury
   D. None of the above

4. Over-trituration of silver alloy and mercury_______________?

   A. Reduces contraction
   B. Increases the strength of lathe cut alloy but reduces the strength of spherical alloy amalgam
   C. Decreases creep
   D. Gives al dull and crumbly amalgam

5. Which one of the following is not an objective of trituration ?

   A. Remove oxides from powder particle surface
   B. Keep the amount of gamma-1 or gamma-2 matrix crystals to maximum
   C. Pulverize pelletes into particles to aid in attack by mercury
   D. Achieve a workable mass of amalgam in minimum time

6. During amalgamation, trituration is done to_____________?

   A. Dissolve the alloy in mercury
   B. Coat the alloy particle with mercury
   C. Remove excess mercury from the amalgam
   D. Dissolve Hg in alloy

7. High strength amalgam is achieved by_____________?

   A. Maximum matrix and minimum alloy phase
   B. Minimum matrix and maximum alloy phase
   C. Maximum matrix phase
   D. Minimum alloy phase

8. 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

9. Amalgam achieves 70% of the strength by____________?

   A. hours
   B. 4 hours
   C. 8 hours
   D. 16 hours

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

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