Perforated impression tray are used for_______________?

Related Mcqs:

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

   A. Utility wax
   B. Base plate wax
   C. Beading wax
   D. Boxing wax

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. 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

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

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

5. 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

6. K2SO4 in agar-agar is for_______________?

   A. Accelerating the setting stage of gypsum
   B. Increase strength
   C. Give dimensional stability
   D. None of the above

7. Frozen slab technique of mixing zinc phosphate is used for_______________?

   A. Cementing crowns
   B. Temporary dressing
   C. base
   D. cementing orthodontic bands

8. Waxes are used for_______________?

   A. Primary impression
   B. Corrective impressions
   C. Impression of single tooth
   D. None of the above

9. Quartz in investment material is added for_______________?

   A. Strength
   B. Expansion components for casting shrinkage
   C. Decrease strength
   D. Contraction

10. Acid-etching is done for_______________?

    A. 30 seconds
    B. 60 seconds
    C. 90 seconds
    D. 120 seconds