The Knoop Hardness Number of Microfilled composite Restorative material ranges from____________?

Related Mcqs:

1. A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have________________?

   A. Greater ductility
   B. Greater toughness
   C. A higher modulus of elasticity
   D. A higher modulus of elasticity
   E. More resistance to permanent deformation

2. The particle size in microfilled composites is_____________?

   A. 0.05 to 0.04mm
   B. 0.5 to 1.0 microns
   C. 0.01 to 0.1 microns
   D. 0.3 to 0.4mm

3. What is the most frequently used restorative material ?

   A. Silicate
   B. Amalgam
   C. Composite
   D. Gold

4. Why GIC is best restorative material in children_____________?

   A. High strength
   B. Good marginal integrity
   C. It can bond enamel & dentin
   D. It has less occlusal wear

5. What is the disadvantage of using composites as restorative material ?

   A. Increased thermal conductivity
   B. Decreased wear resistance
   C. Decreased thermal conductivity
   D. None of the above

6. Which of the following hardness test is a micro hardness test ?

   A. Brinnel
   B. Knoop
   C. Shore-A
   D. Rockwell

7. Which one of the following restorative materials is having coefficient of thermal expansion close to that of tooth enamel and dentin ?

   A. Microfilled composite resins
   B. Pure gold
   C. Silver amalgam
   D. Type II Glass ionomer cement

8. The function of the coupling agent in a restorative resin is to allow______________?

   A. Adhesion of resin particles
   B. Bonding between filler crystals
   C. Bonding between filler and resin
   D. Bonding between tooth and resin

9. Which of the following is an example of a composite material ?

   A. A filled resin
   B. Colloidal silica
   C. Gold alloy
   D. Wax

10. Mercury intoxication in dental office mainly results from____________?

    A. Direct contact with the mercury
    B. Inhalation of mercury vapours
    C. Ingestion of mercury
    D. None of the above