Search
.Management Sciences
Category: Dental Materials
The β (Beta) hemihydrate of gypsum requires more water to float its powder particles because______________?
A. They are more regular in shape and dense
B. They are more regular in shape and highly porous
C. They are more irregular in shape and porous
D. They are more dense and prismatic in shape
In plaster of paris the setting time is primarily altered by_________________?
A. Altering P / L Ratio
B. Altering temperature of mixing water
C. Speed and length of hand spatulation
D. Addition of accelerators and retarders
Ductility of a material is a measure of it’s_______________?
A. Grain elongation
B. Anealing
C. Cold working
D. Work hardening
Which of the following is not affected by saliva ?
A. Impression plaster
B. Impression paste
C. Silicon impression material
D. None of the above
The most commonly used, most biocompatible and adhesive cement is______________?
A. Zinc phosphate
B. Zinc oxide eugenol
C. Calcium hydroxide
D. Glass ionomer
Frozen slab technique of mixing zinc phosphate is used for_______________?
A. Cementing crowns
B. Temporary dressing
C. base
D. cementing orthodontic bands
The basic constituent of reversible hydrocolloid impression material is________________?
A. Agar
B. Alginic acid
C. Gelatin
D. alginate
Frozen slab technique is applicable to_____________?
A. Zinc phosphate cement
B. Glass Ionomer cement
C. Zinc oxide Eugenol cement
D. Resin cement
Most biocompatible material in oral cavity is_______________?
A. Platinium
B. Palladium
C. Titanium
D. Gold
Cold cure acrylic expand in water by___________?
A. 1% by volume 0.23% by weight
B. 10% by volume 0.23% by weight
C. 0.1% by volume 0.23% by weight
D. None of the above
Recent Comments