The % of free monomer in a heat – cured acrylic resin is_______________?

Related Mcqs:

1. 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 strength
   C. Excessive shrinkage
   D. Excessive brittleness

2. All of the following statements about the differences between self-polymerizing acrylic resins and heat-cured resins are true EXCEPT______________?

   A. The former have a lower molecular weight
   B. The former have higher residual monomer content
   C. The former are more porous
   D. The former have greater transverse strength

3. In heat cure denture base acrylic resins the monomer is___________?

   1. Methacrylate
   2. Ethylmethacrylate
   3. Methyl ethyl methacrylate
   4. Polymethylmethacrylate

4. The accepted polymer to monomer ratio for packing of polymethyl methacrylate resin is____________?

   A. 3:1
   B. 4:1
   C. 10:1
   D. 5:1

5. In self-cure acrylic resin, activator is_____________?

   A. Toluidine
   B. Quaternary ammonium compound
   C. Benzoyl peroxide
   D. Tertiary amine

6. During polymerisation of acrylic resin, above what temperature benzoyl peroxide form freeradicals_______________?

   A. 25°C
   B. 37°C
   C. 50°C
   D. 60°C

7. 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

8. 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

9. Polymerisation of heat-cured methyl methacrylate is initiated by______________?

   A. Tertiary amine
   B. Benzoyl peroxide free radical
   C. Hydroquinone
   D. Methyl ether

10. The most important disadvantage of acrylic denture base is_______________?

    A. porosity
    B. Shrinkage
    C. Tooth breakage
    D. Water absorption