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

Related Mcqs:

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

   A. Addition polysilicone
   B. Condensation polysilicone
   C. Polyether
   D. Polysulfide

2. Immediate pouring of impressions is most critical in_____________?

   A. Condensation polysillicon
   B. Addition Polysilicon
   C. Polyether
   D. A and B

3. 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

4. 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

5. 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

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

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

7. 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

8. Water powder ratio of dental stone and plaster is respectively_________________?

   A. 0.28 and 0.6
   B. 0.6 and 0.28
   C. 0.6 and 3.2
   D. 0.28 and 0.98

9. Most ideally elastic among the following_______________?

   A. Polyether
   B. Addition silicone
   C. Polysulphide
   D. Condensation silicone

10. The plasticizers used in polyether impression material is_______________?

    A. polyether polymer
    B. Colloidal silica
    C. Glycol ether
    D. Di-vinyl poly (dimethyl siloxane)