The polymerization of self-curing resin takes faster in______________?
A. Cold water
B. Hot water
C. Under pressure
D. In vaccum
Dental Materials
Acid-etching is done for_______________?
Acid-etching is done for_______________?
A. 30 seconds
B. 60 seconds
C. 90 seconds
D. 120 seconds
No trail closure is necessary with which one of the technique during denture fabrication_____________?
No trail closure is necessary with which one of the technique during denture fabrication_____________?
A. Compression moulding technique
B. Injection moulding technique
C. Fluid resin technique
D. Light cured technique
The function of the coupling agent in a restorative resin is to allow______________?
The function of the coupling agent in a restorative resin is to allow______________?
A. Adhesion of resin particles
B. Bonding between filler crystals
C. Bonding between filler and resin
D. Bonding between tooth and resin
Which of the following constituents is common in occlusal sealants, bonding agents, composite resins ?
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
The most important disadvantage of acrylic denture base is_______________?
The most important disadvantage of acrylic denture base is_______________?
A. porosity
B. Shrinkage
C. Tooth breakage
D. Water absorption
Radio opacity to composite resins is rendered by_______________?
Radio opacity to composite resins is rendered by_______________?
A. Silica glass
B. Organic matrix
C. Barium glass and strontium glasses
D. Fluoride particles
Acrylic (cold cure)______________?
Acrylic (cold cure)______________?
A. Melts at 100°C
B. Softens at 100°C
C. Still requires heat for polymerization
D. Produces heat during polymerization
Use of dimethyl-P-toluidine is indicated for_______________?
Use of dimethyl-P-toluidine is indicated for_______________?
A. Thermal polymerization of acrylic
B. Chemical polymerization
C. Retarding the polymerization reaction
D. To inhibit the action of benzoyl peroxide
If curing occurs at temperature more than 100°C porosity results in which area of denture______________?
If curing occurs at temperature more than 100°C porosity results in which area of denture______________?
1. Hard thick central area
2. Thin Palatal area
3. Thin area of flanges
4. Porosity is uniformly distributed