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.Management Sciences
Category: Restorative Resins
Which one of the following is used as filler in composite resins ?
A. Quartz
B. Silicates
C. Zinc particles
D. Aluminium
The % of free monomer in a heat – cured acrylic resin is_______________?
A. 3% to 5%
B. 8% to 10%
C. 0.2% to 0.5%
D. 0.6% to 0.8%
The imperfection seen on the lingual flange of a lower denture caused by rapid heating during a curing cycle is called_____________?
A. Localised Shrinkage porosity
B. Gas inclusion porosity
C. Micro porosity
D. Surface porosity
Which of the following is an example of a composite material ?
A. A filled resin
B. Colloidal silica
C. Gold alloy
D. Wax
One bottle system of adhesive resins_____________?
A. 4th generation bonding agents
B. Separate etching step not required
C. Separate etching step is still required
D. Contains only primer
Insufficient closure of the flasks during packing of denture base resin can result in_____________?
A. Poor colour stability
B. Less polymerization shrinkage
C. Increase in vertical dimension
D. Decrease in vertical dimension
Residual monomer content of chemically activated resins is______________?
A. 0.2% to 0.5%
B. 2% to 5%
C. 0.3% to 0.5%
D. 2% to 5%
Dentin conditioner has the following function______________?
A. Removes smear layer
B. Increases surface energy of dentin
C. Forms a thin resin layer over exposed collagen fibrils
D. Helps in bonding with composite
Cross linking in denture base resin is contributed by_____________?
A. Glycol dimetharylate
B. Benzoyl peroxide
C. N-para toluidine
D. Methyl methacrylate
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