A. Cause fracture of the filling
B. Tarnish and corrosion
C. Increase the strength
D. Decrease condensation pressure
0
Which of the following statements about high copper silver alloy compared to conventional alloy is not true ?
0
Compare to conventional amalgams, spherical amalgams_______________?
A. It has increased tensile and compressive strength
B. It has poor tarnish and corrosion resistance
C. It’s edge strength is greater
D. Mercury content in the final restoration is less
0
Which of the following phases of dental amalgam has minimum strength____________?
A. Require more mercury
B. Require heavy compection forces
C. Have longer setting times
D. None of the above
0
The ADA specification No 1 for composition of amalgam alloy recommends______________?
A. Gamma 1
B. Gamma 2
C. Epsilon 1
D. Gamma 3
0
The highest mercury concentration in amalgam filling is found_____________?
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
0
The term trituration means____________?
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
0
A. Lysing amalgam alloy
B. Mixing of amalgam alloy and mercury
C. Removal of excess of mercury
D. None of the above
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