Moisture contamination of amalgam can lead to_____________?
Moisture contamination of amalgam can lead to_____________? A. Marginal breakdown B. ShrinkageC. Delayed expansion D. increased stresses
Moisture contamination of amalgam can lead to_____________? A. Marginal breakdown B. ShrinkageC. Delayed expansion D. increased stresses
In a high copper amalgam the phase, which is eliminated is_______________? A. Gamma 1B. Gamma 2 C. Gamma 1 and 2 D. No phase is eliminated
Well premeasured capsules of amalgam can release mercury vapour during_______________? A. Mulling B. CarvingC. Condensation D. Trituration
In spherical alloys as compared to lathe cut____________? A. Less condensing force is required B. More condensing force is required C. Both require same condensing force D. Manipulation is easy
Chronic mercury toxicity results from_____________? A. Ingestion while removing old amalgam B. Skin contact C. Mercury vapourD. All of the above
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
Which of the following statements about high copper silver alloy compared to conventional alloy is not true ? A. It has increased tensile and compressive strengthB. It has poor tarnish and corrosion resistance C. It’s edge strength is greater D.…
Compare to conventional amalgams, spherical amalgams_______________? A. Require more mercury B. Require heavy compection forces C. Have longer setting timesD. None of the above
Which of the following phases of dental amalgam has minimum strength____________? A. Gamma 1B. Gamma 2 C. Epsilon 1 D. Gamma 3
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% cooperC. 65% silver, 29% tin and 5-6% copper D. None of the above