Which of the following impression materials is easy to pour and difficult to remove the stone cast from the impression ?

Related Mcqs:

1. Agar impression materials differ from alginate impression materials in that the former sets by_______________?

   A. Mechanical action of saliva
   B. Physical change
   C. Evolution
   D. Chemical change

2. 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

3. 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

4. The best way to remove a hydrocolloid impression from the patient’s mouth is____________?

   A. Slight rocking of the impression to disengage it from the undercut
   B. Wetting the periphery of the impression with moist cotton to break the peripheral seal
   C. Sudden jerking of the impression to prevent tearing
   D. Supporting the impression along with the tray to prevent disengaging of the tray alone

5. Best impression material to be used for securing impression after crown preparation_______________?

   A. Alginate
   B. Agar
   C. Elastome
   D. Zno paste

6. Before pouring an elastic impression it is washed with slurry of water and stone to______________?

   A. Increase gel strength
   B. Prevent syneresis
   C. Prevent distortion
   D. Wash off saliva on impression

7. The impression for a diagnostic cast of a partial edentulous mouth should be taken in_______________?

   A. Impression wax
   B. Modelling compound
   C. Hydro-colloid
   D. Hydro cal

8. Which one of the following impression materials is elastic, sets by a chemical reaction and is catalyzed by chloroplatinic acid_______________?

   A. Condensation silicone
   B. Polyether
   C. Polysulfide
   D. Poly vinyl siloxane

9. Heavy and light body impression materials are use with______________?

   A. Mercaptan
   B. Silicone
   C. Reversible hydrocolloid
   D. A and B

10. The ranking of tear strength from the lowest to highest of all impression materials generally is as follows_______________?

    A. Hydrocolloids, silicones, polyether, polysulfide
    B. Silicones, hydrocolloids, polyether, polysulfide
    C. Polysulfide, hydrocolloids, silicones, polyether
    D. Hydrocolloids, polyether, silicones, polysulfide