Author Question: Etching agents are not dangerous and therefore do not require any safety measures. a. True b. False ... (Read 132 times)

lbcchick · **on:** Jun 25, 2018

Etching agents are not dangerous and therefore do not require any safety measures.
a. True
b. False
Indicate whether the statement is true or false

Question 2

Why is the etchant or conditioner applied on the occlusal surface 2 to 3 mm beyond the area to be sealed?
a. To prevent fracture of the sealant and possible microleakage.
b. To ensure coverage of the tooth.
c. To make room for buffing after the sealant process.
d. Because there is shrinkage of the material after application.

Kimmy · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

False
RATIONALE: Care must be given to the etching process because most etching agents contain phosphoric acid. The patient and the assistant should wear protective glasses when etchants are used.

Answer to Question 2

a
RATIONALE: The etchant or conditioner is applied on the occlusal surface 2 to 3 mm beyond the area to be sealed. The tooth must be etched beyond the sealant to prevent fracture of the sealant and possible microleakage.