Which of the following is an example of a composite material ?
Which of the following is an example of a composite material ? A. A filled resin B. Colloidal silica C. Gold alloy D. Wax
Which of the following is an example of a composite material ? A. A filled resin B. Colloidal silica C. Gold alloy D. Wax
In heat cure denture base acrylic resins the monomer is___________? 1. Methacrylate 2. Ethylmethacrylate 3. Methyl ethyl methacrylate 4. Polymethylmethacrylate
Light cure system, side effect is____________? A. Iritis B. Cataract C. ConjunctivitisD. Retinal damage
Bonding of composite resins to tooth structure is by________________? A. Covalent bond B. Ionic bondC. Mechanical D. Vanderval forces
The type of spatula used to mix composite is________________? A. Plastic B. Stainless steel C. Iron D. None of the above
Which of the following may result if an excessive amount of monomer is incorporated into an acrylic resin mixture ? A. Excessive expansion B. Low impact strengthC. Excessive shrinkage D. Excessive brittleness
Benzoin methyl ether in a polymer indicates that they may be cured in the presence of________________? A. UV light B. Visible light C. Infrared light D. Diketone
Porosity of denture base is due to_______________? A. Packing at dough stage B. Curing at 160°F for 9 hrs C. Inadequate pressureD. All of the above
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 porosityC. Micro porosity D. Surface porosity
The particle size in microfilled composites is_____________? A. 0.05 to 0.04mm B. 0.5 to 1.0 micronsC. 0.01 to 0.1 microns D. 0.3 to 0.4mm