Finishing and Polishing Cast Restoration Flashcards

1
Q

How many sequential zones does the crown have?

A

7

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2
Q

What is zone 5?

A

Occlusal surface

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3
Q

Air etching removes how much of the surface of a metal crown?

A

20µ

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4
Q

Polishing with a soft brush and rouge removes how much of the surface of a metal crown?

A

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5
Q

What is zone 6?

A

Axial walls

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6
Q

What is zone 7?

A

External margin

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