Which of the following may result if an excessive amount of monomer is incorporated into an acrylic resin mixture ?

Related Mcqs:

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

   A. 3% to 5%
   B. 8% to 10%
   C. 0.2% to 0.5%
   D. 0.6% to 0.8%

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

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

3. 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

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

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

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

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

6. 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

7. 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

8. Porosity present in a acrylic denture is usually the result of______________?

   A. A prolonged curing cycle
   B. Lack of sufficient pressure applied to flask
   C. Insufficient acrylic resin monomer
   D. Prolonged bench cooling after curing

9. Insufficient closure of the flasks during packing of denture base resin can result in_____________?

   A. Poor colour stability
   B. Less polymerization shrinkage
   C. Increase in vertical dimension
   D. Decrease in vertical dimension

10. Insufficient closure of the flasks during packing of denture base resin can result in_____________?

    A. Poor colour stability
    B. Less polymerization shrinkage
    C. Increase in vertical dimension
    D. Decrease in vertical dimension