Which step in cavity preparation determines the primary shape and placement of cavity walls?

Question

Quizplus · Accepted Answer

The resistance form of cavity preparation is when the dentist determines the primary shape and placement of cavity walls.
Outline form is when the dentist decides on the design and initial depth of sound tooth structure.
Retention form is when the dentist knows where to place retention in the preparation to help in securing the restoration in place.
Convenience form is when the dentist has accessibility in preparing and restoring the tooth.

Which Step in Cavity Preparation Determines the Primary Shape and Placement