EFDA Sealant Application and Polishing 2

Question 1

Which type of pit and fissure sealant requires a curing light to polymerize?

Accepted Answer

Light-cured (photopolymerized) sealant

Answer

Light-cured sealants contain a photoinitiator that activates only when exposed to a curing light of the appropriate wavelength.

Question 2

What is the primary purpose of applying a conditioner (etchant) before sealant placement?

Accepted Answer

To create microporosities in enamel for mechanical retention

Answer

Acid etching creates microscopic pores in the enamel that allow resin tags to form, providing mechanical retention for the sealant.

Question 3

A patient returns six months after sealant placement and the sealant appears partially missing. What is the MOST likely cause?

Accepted Answer

Moisture contamination occurred during the bonding step

Answer

Moisture contamination is the most common cause of sealant failure because saliva or water disrupts the bond between the etched enamel and resin.

Question 4

When evaluating sealant integrity at a recall appointment, which instrument is most appropriate?

Accepted Answer

Explorer

Answer

A sharp explorer is used to assess sealant retention by checking for voids, gaps, or areas where the sealant can be displaced.

Question 5

Which teeth are considered the BEST candidates for pit and fissure sealants?

Accepted Answer

Permanent molars with deep occlusal pits and fissures

Answer

Permanent molars with deep, narrow pits and fissures are the highest-risk sites for caries and the best candidates for sealant placement.

(EFDA) Expanded Function Dental Auxiliary Practice Test