What is the polymerization shrinkage if 3:1 powder: liquid ratio is used____________?
A. 6%
B. 8%
C. 10%
D. 21%
Restorative Resins
Macromolecules in Dental Resin is attached by______________?
Macromolecules in Dental Resin is attached by______________?
A. Covalent bonds
B. sonic bonds
C. Vander Wall’s Forces
D. Hydrogen Bonds
Along with polymerisation shrinkage, one of the major disadvantages of polymethyl methacrylate as denture base resin are its poor_____________?
Along with polymerisation shrinkage, one of the major disadvantages of polymethyl methacrylate as denture base resin are its poor_____________?
A. Biological properties
B. Thermal properties
C. Mechanical properties
D. Esthetic properties
The most common coupling agents are organic silicon compound called_______________?
The most common coupling agents are organic silicon compound called_______________?
A. Parabane
B. Ligane
C. Silane
D. Chelane
One bottle system of adhesive resins_____________?
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
Most advantageous indication of acid etching is______________?
Most advantageous indication of acid etching is______________?
A. Decrease micro leakage
B. Decrease polymerization shrinkage
C. Decrease coefficient of thermal expansion
D. Decrease porosity in restorative material
VLC resins are also called as______________?
VLC resins are also called as______________?
A. Microwave-activated resins
B. Tertiary amine-activated resins
C. Light activated resins
D. Heat activated resins
Cold cure acrylic expand in water by___________?
Cold cure acrylic expand in water by___________?
A. 1% by volume 0.23% by weight
B. 10% by volume 0.23% by weight
C. 0.1% by volume 0.23% by weight
D. None of the above
Which of the following is NOT true of polymethyl methacrylate ?
Which of the following is NOT true of polymethyl methacrylate ?
A. Knoop hardness number 18 to 20
B. Tensile strength of 60 MPa
C. Density of 1.13 g/cm3
D. Modulus of elasticity of 3.4 GPa
Etchant preferred in gel from than in liquid form________________?
Etchant preferred in gel from than in liquid form________________?
A. Better control over placement
B. Enhance and concentrate the action of acid
C. Helps in visualization while placement
D. None of the above