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.Management Sciences
Category: Dental Materials
The chemical used to etch enamel is_______________?
A. Zinc oxide
B. Methyl methacrylate
C. Phosphoric acid
D. Eugenol
Which of the following properties of dental materials is time dependent_______________?
A. Creep
B. Resillience
C. Elastic limit
D. Ultimate strength
Putty wash technique_________________?
A. Light body and putty used at the same time
B. Putty used first and light body used second
C. Light body first and putty later
D. None of the above
K2SO4 in agar-agar is for_______________?
A. Accelerating the setting stage of gypsum
B. Increase strength
C. Give dimensional stability
D. None of the above
Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?
A. Addition polysilicone
B. Condensation polysilicone
C. Polyether
D. Polysulfide
Which of the waxes are derived from the lignite_________________?
A. Paraffin wax
B. Inlay wax
C. Microcrystalline wax
D. Montan wax
Polycarboxylate cement is used for_____________?
A. Temporary restoration
B. Leuting
C. Permanent restoration
D. Die material
Which of the following is common to both zinc eugenol cement and polycarboxylate cement?
A. Polyacrylic acid is liquid
B. Chemical bond to tooth structure
C. Chelation
D. Substitution o eugenol by EBA to increase strength of cement
The best tissue tolerated material for crown and bridge_______________?
A. Highly polished porcelain
B. Highly polished acrylic
C. Highly glazed porcelain
D. Highly polished metal
Gallium and indium added to Amalgam replace______________?
A. Silver
B. Tin
C. Mercury
D. Zinc
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