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

Related Mcqs:

1. 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

2. 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

3. In processing methyl methacrylate, the resin may show porosity if the flask is placed too soon porosity most likely occur_____________?

   A. Throughout the denture
   B. Near the borders
   C. In the thickest part
   D. On the denture surface

4. 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%

5. 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

6. 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

7. 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

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. The most accepted theory for dentin sensitivity is: or Which of the following is the most accepted theory of transmission of dental sensation_____________?

   A. Transduction theory
   B. Direct neural stimulation
   C. Hydrodynamic theory
   D. Hydrostatic theory

10. The advantage of unfilled methyl methacrylate is that______________?

    A. It can be finished smoothly
    B. It has a low degree of flow
    C. It’s non-irritation to pulp
    D. It’s wear resistant is high