Which is best material for RPD impression_______________?

Related Mcqs:

1. What is the minimum thickness of the elastomeric impression material for an accurate impression_______________?

   A. 2 mm
   B. 2-4 mm
   C. Greater than 3 mm
   D. Maximum in the area of operation

2. Alginate impression material is similar to Agar-agar impression material in the following respect________________?

   A. Gelation increase in both on increase in temperature
   B. Mixing time is increased to reduce the setting time
   C. Deformation during removal of impression occurs due to distortion of gel fibers
   D. Both can be re-used for fresh impressions

3. All of the following statements about Type II silicon impression material are true EXCEPT_______________?

   A. They evolve hydrogen when cast if they are not fully cured
   B. They exhibit a very low setting shrinkage
   C. They have a lower tear resistance than polysulphide rubbers
   D. They set by condensation polymerisation

4. Which material is the most difficult to remove from the patients mouth ?

   A. Metallic oxide paste
   A. Silicone impression material
   B. Reversible hydrocolloid
   C. Impression plaster

5. One of the most important advantages of truly elastic impression material would be its capacity for______________?

   A. Close adaptation to soft tissues
   B. With drawl without permanent distortion
   C. Reproduction of surface details
   D. Compatibility with gypsum products

6. Inelastic impression material is_____________?

   A. Impression compound
   B. Alginate
   C. Agar-agar
   D. Polyether

7. Which of the following is correct arrangement of impression material regarding linear contraction in ascending order ?

   A. Addition silicone < polyether < polysulfide < condensation silicone
   B. Addition silicone < polysulfide < Polyether < condensation silicone
   C. condensation silicone < polyether < polysulfide < Addition silicone
   D. condensation silicone < polysulfide < polyether < Addition silicone

8. Which of the following impression material requires a hardener ?

   A. Agar
   B. Alginate
   C. Elastomers
   D. Impression compound

9. Hydrocolloid material, show all except______________?

   A. Hysterisis
   B. Imbibition
   C. Recrytallisation
   D. Syneresis

10. Which material undergoes hysteresis ?

    A. Irreversible hydrocolloid
    B. Reversible hydrocolloid
    C. Impression plaster
    D. Metallic oxide paste