The air-water spray used as a coolant in high speed cutting of a cavity will 1. decrease pulp damage. 2. reduce frictional heat. 3. keep the operating site clean. 4. reduce clogging of cutting instruments.
(2) and (4)
(1) (2) (3)
(1) and (3)
All of the above.
(4) only
1 explanations
oneguy
Frictional heat is produced whenever a rotary bur or stone contacts tooth structure. Without a coolant, vital dental will be scorched and pulp is injured. The air-water spray with sufficient volume also helps to remove the debris to keep the operating site clean and to reduce clogging of cutting instruments.
oneguy