Which of the following are characteristic feature of high copper amalgam alloy ?
Which of the following are characteristic feature of high copper amalgam alloy ? A. Low compressive strength B. High marginal breakdownC. Less marginal # D. High creep
Which of the following are characteristic feature of high copper amalgam alloy ? A. Low compressive strength B. High marginal breakdownC. Less marginal # D. High creep
Co-efficient of Thermal exansion of amalgam is______________? A. 6.6 a (ppm k-1) B. 11.4 a (ppm k-1) C. 14.0 a (ppm k-1)D. 25.0 a (ppm k-1)
A patient who has had a recent amalgam filling in the upper teeth has a gold filling in the lower teeth, the patient complains of pain. The reason for this can be mainly_____________? A. Improper amalgam filling B. Pulp exposureC.…
Outstanding clinical performance of dental amalgam restoration is related to its____________? A. Compressive strength B. Tensile strength C. Corrosion D. Creep
Absorption of mercury in the human body occurs least from_____________? A. Lungs B. Gastro-intestinal Track C. SkinD. Kidneys
High copper amalgam can be produced_____________? A. From smooth atomized particlesB. From irregular and spherical particles C. From lathe cut particles D. From traditional alloy particles
Which one of the following is not an objective of trituration ? A. Remove oxides from powder particle surfaceB. Keep the amount of gamma-1 or gamma-2 matrix crystals to maximum C. Pulverize pelletes into particles to aid in attack by…
Gallium and indium added to Amalgam replace______________? A. Silver B. TinC. Mercury D. Zinc
Which is true regarding lathe cut silver alloy_______________? A. Requires least amount of mercuryB. Achieves lowest compressive strength at 1 hr. C. Has tensile strength both at 15 min & 7 days comparable to high copper unicompositional alloy D. Has…
Adequate mixing of mercury is indicated by_______________? A. Dry MixB. Shiny Mix C. Short Mixing Time D. None of the above