Chapter 18- Working casts and dyes Flashcards
1
Q
What are the 3 requirements for good casts?
A
Bubble free, distortion free, margins must be trimmed to allow access for carving wax pattern margins
2
Q
What is the simplest way of making a working cast and dye?
A
Working cast with separate dye
3
Q
What is the disadvantage?
A
Wax pattern must be transferred from one to another which may distort the wax as a result
4
Q
When pouring an impression for working cast with separate dye, what stone is used?
A
Type 4 or 5
5
Q
What is the advantage to a working cast with removable dye?
A
Eliminates discrepancies between dye and working cast
6
Q
What is the disadvantage?
A
Error in the dye can be introduced if it does not reseat properly in the working cast
7
Q
What are the 3 things removable dyes should do?
A
- Return to their exact original positions
- Remain stable even when inverted
- Cast containing the dyes should be easy to mount on the articulator
