Which of the following decreases the rate of abrasion?
1 . Use of a dry abrasive.
2 . Use a firm pressure.
3 . Increase the speed of the handpiece.
4 . Use a lot of abrasive material.
5 . Use of a small grit abrasive material

a. 1, 2, 3, 4, 5
b. 1, 2, 4, 5
c. 5 only
d. 1 only


c
RATIONALE: Use of a small grit abrasive material decreases the rate of abrasion.

Health Professions

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