Violation

When using a high-speed handpiece for cavity preparation, the heat generated is directly related to the 1. duration of cutting. 2. size, speed and sharpness of the bur. 3. use of air and water spray. 4. effectiveness of the suction

(1) (2) (3)

(1) and (3)

(2) and (4)

(4) only

All of the above.

Please describe the matter of abuse