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First step in cavity preparation

# Which of the following describes the 1st step in cavity preparation according to G.V. Black?
A Retention form
B. Outline form
C. Resistance form
D. Convenience form


The correct answer is B. Outline form.

The 1st step in cavity preparation according
to G V Black is to establish the outline form.
The initial extension or the outline form of
the tooth preparation should be visualized
preoperatively by estimating the extent of
the defect, the preparation form requirements of the amalgam, and the need
for the adequate access to place amalgam
into the tooth.

G.V Blacks various steps of cavity preparation are:
- Establish outline form
- Obtain retention form
- Obtain resistance form
- Obtain convenience form

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