The standard perforated tray for us with alginate impression materials may be brought to more customized contour by_______________?

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. Perforated impression tray are used for_______________?

   A. Alginate
   B. Zinc oxide-eugenol
   C. Agar-agar
   D. Impression compound

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. 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

5. During setting of alginate impression materials________________?

   A. Trisodium phosphate reacts with sodium alginate
   B. Trisodium phosphate reacts with calcium sulphate
   C. Colloidal changes to sol
   D. Material in contact with soft tissues sets last

6. Alginate impression material is________________?

   A. Non-elastic impression material
   B. Thermoplastic impression material
   C. More mucostatic than ZOE
   D. Less mucostatic than ZOE

7. The term given to the phenomenon of moisture absorption by an alginate impression in________________?

   A. Imbibition
   B. Syneresis
   C. Hysteresis
   D. Gelation

8. All of the following statements about an alginate impression are EXCEPT________________?

   A. It should be rapidly displaced from the mouth
   B. It may exhibit fluid exudates on the surface as a result of imbibition of water
   C. It will take up water and expand if kept wet
   D. It will shrink as a result of syneresis

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

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

10. 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