FABRICATION OF THE METAL FRAMEWORK

Question 1

How much undercut is needed for any cast metal/material?

Answer 1

.01”

Question 2

How much undercut is needed for wrought wire?

Answer 2

.02”

Question 3

Casts are ____ to eliminate undercut areas that will be crossed by the rigid parts of RPD

Answer 3

Blocked out in wax

Question 4

What are the 4 areas that are arbitrary blockouts used in certain scenarios?

Answer 4

Gingival crevices
Spaces between teeth not in design
Gross tissue undercuts
Areas that would complicate the duplication process

Question 5

The _____ cast is used for investment to allow the wax to boil out to make the metal framework

Answer 5

Refractory cast

Question 6

Space between the framework and cast/soft tissue
Beneath framework: extension in edentulous areas
-Provide attachment of denture base
- form internal finish line

Answer 6

Relief

Question 7

___ material is made of a gypsum material that has a certain amount of expansion
- used to make refractory cast

Answer 7

Investment materials

Question 8

_______ which has been
warmed, is poured and it flows into the
duplication flask.

Answer 8

Reversible hydrocolloid

Question 9

What cast is used to fabricate the framework pattern using wax?

Answer 9

Refractory cast

Question 10

What impression material is used to make an impression of the wax pattern on the refractory cast?

Answer 10

Agar (Reversible hydrocolloid)