Secondary Impression

Question 1

Relief wax used

Answer 1

Modelling wax/ non-asbestos casting liner

Question 2

Spacer is not required while using the impression materials ____________ for secondary impressions

Answer 2

1. ZnOE
2. Medium bodied elastomers

Question 3

Thickness of a spacer

Answer 3

2mm

Question 4

Commonly used separating medium:

Answer 4

Cold Mould seal, Tin Foil, Starch, Vaseline, Cellulose acetate

Question 5

How to prevent shellac from sticking to the cast

Answer 5

1. soak it in water (not a very good method)
2. using talcum powder (best)
3. Tin foil (alternative)

Question 6

What are the signs of underpostdamming

Answer 6

air bubbles seen under the posterior border