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.Management Sciences
Category: Dental Materials
PH of which cement remain below 7 even after 1 month after insertion into the cavity ?
0
A. Glass Ionomer Cement
B. Zinc Phosphate
C. Resin cement
D. Silicate cement
The function of 2% potassium sulphate in a gypsum product is_____________?
A. To regulate the setting expansion
B. Regulate setting time
C. Acts as retarder
D. None
Agar impression materials differ from alginate impression materials in that the former sets by_______________?
A. Mechanical action of saliva
B. Physical change
C. Evolution
D. Chemical change
The first porcelain tooth material was introduced by______________?
A. DeChemant
B. Ash
C. Plateau
D. McClean
Denture acrylics contain cross-linking agents mainly to improve their_____________?
A. Internal color
B. Tissue compability
C. Surface hardness
D. Craze resistance
Casting flux is used to_______________?
A. Prevent the oxidation of the metal during melting
B. increase the melting point of the flux
C. Flaring the point of the sprue attachment
D. None of the above
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