Dynamic creep is the______________? A. Continuing alloying between silver-tin alloy and mercury during the life of restorationB. Deformation of set amalgam during function C. Process whereby alloy is wetted by murcury D. Spread of amalgam during packing
The dental amalgam is most resistant to________________? A. Compressive stress B. Impact stress C. Shear stress D. Tensile stress
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
Admixed high copper alloy powder contains_________________? A. 9-20% copper B. 13-20% copper C. 9-30% copper D. 13-30% copper
Finishing and polishing of Amalgam make the restoration______________? A. Increase in tarnish and corrosion resistance B. Increase the marginal strength C. Decrease the tarnish and corrosion resistance D. Increased compressive strength
Setting time of Amalgam is best controlled by _______________? A. Using spherical particles B. Lathe cut alloy C. Altering Hg-Alloy ratioD. Trituration time
In non zinc containing dental amalgam alloy the percentage of zinc present is______________? A. Less than 0.02% B. Less than 0.1%C. Less than 0.01% D. None of the above
High copper dental amalgams are superior to other amalgams because high copper dental amalgems______________? A. Have less marginal breakdown B. Are workable at lower Hg-alloy ratio C. Have a higher ratio of tensile to compressive strength D. Have less resistance…
The largest component of amalgam alloy is_____________? A. Silver B. Tin C. Zinc D. Copper
During amalgamation, trituration is done to_____________? A. Dissolve the alloy in mercuryB. Coat the alloy particle with mercury C. Remove excess mercury from the amalgam D. Dissolve Hg in alloy