Chapter 3 J: Class III Preparation

Question 1

Choose the incorrect answer?
A: Secondary resistance is given by sufficient bulk of amalgam

B: Secondary retention is given by grooves

C: The outline of a class III includes proximal and incisal surfaces

D: Class Ill preparations should have a triangular shape

Answer 1

C

Question 2

Choose the correct answer?
A: secondary resistance is given by sufficient bulk of amalgam
B: secondary retention is given by ridges
C: the outline of a class III includes proximal and incisal surfaces
D: class III preparation shouldn’t have a triangular shape

Answer 2

A