The most important disadvantage of acrylic denture base is_______________?

Related Mcqs:

1. Acrylic resins were first introduced as a denture base material in______________?

   A. 1925
   B. 1937
   C. 1951
   D. 1956

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

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

3. 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

4. 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

5. 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

6. 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

7. The latest method of curing denture base resins______________?

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

8. Porosity of denture base is due to_______________?

   A. Packing at dough stage
   B. Curing at 160°F for 9 hrs
   C. Inadequate pressure
   D. All of the above

9. Cross linking in denture base resin is contributed by_____________?

   A. Glycol dimetharylate
   B. Benzoyl peroxide
   C. N-para toluidine
   D. Methyl methacrylate

10. 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%