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.Management Sciences
Category: Dental Materials
The setting time of ZnPO4 cement can be retarded by_____________?
A. mixing more powder to the liquid
B. mixing powder to liquid, checked by water
C. slower addition of powder to liquid
D. faster addition of powder to liquid
Gelation temparature of agar is between________________?
A. 20°C to 25°C
B. 27°C to 33°C
C. 37°C to 50°C
D. 55°C to 60°C
Resistance to corrosion in a cobalt-chrome casting is due to presence of_______________?
A. High quality iron
B. Chrome
C. Cobalt
D. Nickel
A material which is a mixture of two different materials and its properties are_____________?
A. Composite
B. Complex material
C. Combined
D. Compound
Most preferable cement for temporary restoration______________?
A. GIC
B. ZOE
C. Ca (OH)2
D. Zinc polycarboxylate cement
Nickel is added to wrought gold alloys as______________?
A. Strengtherner
B. Hardener
C. Whitens the alloy
D. Scavenger
Ethoxy benzoic acid increases the strength and solubility of the cement______________?
A. Zinc oxide eugenol
B. Polycarboxylate cement
C. Zinc phosphate cement
D. Silicate cement
Thermal conductivity of which material is close to dentin____________?
A. Amalgam
B. Silicate
C. Composite resin
D. Cavity varnish
Cavo surface angle for amalgam resoration is butt joint as____________?
A. It increases compresssive and tensile strengths
B. Decreased compressive, increased strength
C. Decreased compressive, decrease tensile strength
D. Increased compressive, increased tensile strength
Which of the following cements is most kind to pulp ?
A. Glass ionomer
B. Polycarboxylate
C. Silicate
D. Resin cement
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