A. GIC
B. ZOE
C. Ca (OH)2
D. Zinc polycarboxylate cement
✅ The correct answer is option B. ZOE.
Dental Materials
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)
✅ The correct answer is option D. 25.0 a (ppm k-1).
For porcelain fused to metal crown, the porcelain should have ______________?
A. High fusion expansion
B. High fusion temperature
C. Linear coefficient of thermal expansion less than that of metal
D. Linear coefficient of thermal expansion more than that of metal
✅ The correct answer is option C. Linear coefficient of thermal expansion less than that of metal.
Eugenol may be replaced in the zinc oxide eugenol cement by______________?
A. Acetic acid
B. Alginic acid
C. Phosphoric acid
D. Ortho-ethoxy acid
✅ The correct answer is option D. Ortho-ethoxy acid.
Crocus cloth is________________?
A. Emery
B. Garnet
C. Pumice
D. Rouge
✅ The correct answer is option D. Rouge.
What is the recommended for condensation of dental amalgam ?
A. 35 pounds
B. 3 pounds
C. 15 lb
D. 25 lb
✅ The correct answer is option B. 3 pounds.
Mercury rich condition in a slow setting amalgam alloy system in a resoration in______________?
A. Accelerated corrosion
B. Fracture of the restoration
C. Merginal damage
D. All of the above
✅ The correct answer is option D. All of the above.
Which of the following bur is used in the preparation of cavity restored with porcelain fused to metal ?
A. Carbide bur
B. Diamond bur
C. Stainless steel bur
D. Diamond but for porcelain and carbide bur for metal
✅ The correct answer is option D. Diamond but for porcelain and carbide bur for metal.
Mercury is toxic because it_____________?
A. Complexes with hemoglobinto form methemoglobin
B. Inhibits hemoglobin synthesis, producing anemia
C. Inhibits anaerobic glycolysis
D. Binds to sulfhydryl groups
✅ The correct answer is option D. Binds to sulfhydryl groups.
Adequate mixing of mercury is indicated by_______________?
A. Dry Mix
B. Shiny Mix
C. Short Mixing Time
D. None of the above
✅ The correct answer is option B. Shiny Mix.