For photo-curing the composite resin the light source______________?

Related Mcqs:

1. The commonly used laser for curing composite resin is______________?

   A. Nd:YAG
   B. CO2
   C. ER:YAG
   D. Argon

2. One of the claims for the superiority composite resin restoration over silicate cement restorations is that the resin restorations_____________?

   A. Prevent galvanic action
   B. Are practically insoluble in oral fluids
   C. Adapt to the walls of the cavity better
   D. Have a higher coefficient of thermal expansion

3. The polymerization of self-curing resin takes faster in______________?

   A. Cold water
   B. Hot water
   C. Under pressure
   D. In vaccum

4. To prevent porosity in self-cure acrylic resin, curing should be carried in______________?

   A. Cold water
   B. Hot water
   C. Under tap water
   D. Under vacuum pressure

5. Which of the following inhibitor accelerator system uses light activation composite ?

   A. Diketone-amine
   B. Organic acid-metal oxide
   C. Organic acid-peroxide
   D. Peroxide-amine

6. 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

7. The latest method of curing denture base resins______________?

   A. Heat
   B. Visible light
   C. Chemicals
   D. Lasers

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

9. About polymerization shrinkage of composite all are true, except______________?

   A. Polymerization shrinkage is greater if bonded surface area is lesser than unbounded surface area
   B. Polymerization shrinkage is high if within the enamel margins
   C. Acid etching and priming will decrease polymerization shrinkage
   D. Microleakage can occur because of polymerization shrinkage

10. Bonding of composite resins to tooth structure is by________________?

    A. Covalent bond
    B. Ionic bond
    C. Mechanical
    D. Vanderval forces