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.Management Sciences
Category: Dental Materials
Which of the following procedure is indicated to produce cross-linking in the polymerization of linear chains of acrylic_______________?
A. Addition of grain refining agents
B. Addition of difunctional monomers
C. Increasing the amount of heat required for linear polymerization
D. Incorporation of terminating agents
The accepted polymer to monomer ratio for packing of polymethyl methacrylate resin is____________?
A. 3:1
B. 4:1
C. 10:1
D. 5:1
Rapid removal of rubber impression with a single firm motion results in____________________?
A. Reduced dimensional instability
B. Improved adhesion of the impression to the tray
C. Minimal permanent deformation
D. Reduced contamination by saliva
Which of the following silver amalgam alloy have the maximum strength________________?
A. Lathe cut
B. Spherical
C. Admixed
D. Single composition
Cavity varnishes have_____________?
A. Average bonding to tooth
B. Low bonding to tooth
C. Excellent bonding to tooth
D. No bonding to tooth
Amalgam achieves 70% of the strength by____________?
A. hours
B. 4 hours
C. 8 hours
D. 16 hours
The addition of which of the following can accelerate the setting time of zinc oxide cement_____________?
A. Zinc acetate
B. Barium sulphate
C. Zinc sulphate
D. Barium chloride
The most commonly used accelerator in gypsum product is___________________?
A. Sodium fluoride
B. Potassium fluoride
C. Potassium sulfate
D. Aluminium sulfate
Which of the following constituents is common in occlusal sealants, bonding agents, composite resins ?
A. BIS GMA
B. Polymethyl methacrylate
C. Benzoin methyl ether
D. Silica filter
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