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Category: Dental Materials
What is the working time of zinc polyacrylate cement ?
A. 1 Minutes
B. 2 Minutes
C. 3 Minutes
D. 4 Minutes
Nickel-Titanium alloy has__________________?
A. Unreliable spring back
B. low spring back
C. Minimal spring back
D. None of the above
Clogging of an abrasive wheel with debris causing reduction of abrasive action is called________________?
A. Blinding
B. Buffing
C. Dressing
D. Truing
The logical explanation for the unique anticariogenic property of most silicate cements is______________?
A. The reduction in enamel solubility due to fluoride uptake by enamel
B. That beryllium flux is used in silicates
C. That silicates show very little leakage at the margins of the restoration
D. Due to the high silica content
The melting point of silver is_____________?
A. 1063° centigrade
B. 960° Centigrade
C. 850° Centrigrade
D. 1123° Centrigrade
Alginate impression material is similar to Agar-agar impression material in the following respect________________?
A. Gelation increase in both on increase in temperature
B. Mixing time is increased to reduce the setting time
C. Deformation during removal of impression occurs due to distortion of gel fibers
D. Both can be re-used for fresh impressions
Benzoin methyl ether in a polymer indicates that they may be cured in the presence of________________?
A. UV light
B. Visible light
C. Infrared light
D. Diketone
Dendrites in cst alloys form by mechanism of_________________?
A. Constitutional superconductivity
B. Constitutional supercooling
C. Constitutional supergriting
D. Constitutional supergraining
White gold alloy predominantly is______________?
A. Gold added with palladium
B. Gold added with calcium
C. Gold with much of chromium
D. Gold with silver
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