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Category: Dental Materials
The process of changing the rubber base product or liquid polymer, to a rubber like material is generally known as_____________?
A. Boiling
B. Condensation
C. Vulconization
D. Chain lengthening
The ideal temperature of water bath for softening fluid wax is about________________?
A. 51 to 54 degree F
B. 51 to 54 degree C
C. 70 to 75 degree F
D. 70 to 75 degree C
Function of wetting agents used in casting procedure is_________________?
A. To felicitate wetting of ring liner
B. To felicitate mixing investment
C. To reduce contact angle of liquid with max surface
D. For better wax elimination
Model plaster (white) used to cast study models before mixing with water, is largely composed of____________?
A. CaO
B. CaCO3
C. (CaSO4)2-½H2O
D. CaSO4-2H2O
Plaster of paris is mixed in________________?
A. Plastic bowl
B. Rubber bowl
C. Glass bowl
D. Metal bowl
The principal constituent of set silicate cement matrix is_______________?
A. Hydrated Aluminium phosphate
B. Hydrated Aluminium Phosphate with calcium fluoride
C. Hydrate Aluminosilicate gel
D. Hydrated Aluminium phosphate crystal, CAF2 alluminosiliate gel
Which of the following is true about direct filling gold______________?
A. Properly condensed mat gold has no voids
B. Whatever may be the type voids are inherent
C. Voids can be avoided with manual condensation
D. None of the above
Pyroplastic flow of porcelain is due to___________________?
A. High temperature during glazing
B. Low temperature during glazing
C. Improper condensation
D. High firing temperature
Vulcanization refers to the setting of__________________?
A. Reversible hydrocolloid
B. Mercaptan impression material
C. Zinc Phosphate cement
D. Zinc oxide-eugenol
The term trituration means____________?
A. Lysing amalgam alloy
B. Mixing of amalgam alloy and mercury
C. Removal of excess of mercury
D. None of the above
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