Finishing and Polishing Cast Restoration Flashcards
1
Q
How many sequential zones does the crown have?
A
7
2
Q
What is zone 5?
A
Occlusal surface
3
Q
Air etching removes how much of the surface of a metal crown?
A
20µ
4
Q
Polishing with a soft brush and rouge removes how much of the surface of a metal crown?
A
5µ
5
Q
What is zone 6?
A
Axial walls
6
Q
What is zone 7?
A
External margin