Chapter 59 Quizs

Which should be done if a sealant is found to be partially lost during a subsequent examination?

• Attempt to remove the remaining portion of sealant with a bur and replace the entire sealant with new material.

• Freshen the remaining portion of sealant adjacent to the lost portion, re-etch the enamel, and apply new sealant to replace the missing portion.

• Prepare the tooth for a composite restoration.

• Nothing. The sealant has penetrated the enamel rods and confers caries protection.

Which type of sealant is polymerized by photo initiators in the resin that are sensitive to light?

• Cold-cured

• Light-cured

• Self-cured

• Dual-cured

Why are sealants contraindicated in teeth with proximal caries?

• Proximal decay will spread to the occlusal surface.

• Posterior proximal tooth preparation will usually include the occlusal pits and fissures.

• Sealants are placed on smooth surfaces and the proximal area is a smooth surface.

• Sealants are placed on smooth surfaces and the proximal area is a rough surface.

The retention of the sealant is obtained by etching the enamel with what?

• Citric acid

• Phosphoric acid

• Eugenol

• Pumice

Sealants are indicated for which areas?

• Cervical one third of any tooth

• Posterior but not anterior teeth

• The smooth surfaces of teeth but not pits and fissures

• Pits and fissures

What is the most common cause of sealant loss?

• Use of unfilled material

• Use of outdated material

• Moisture contamination during placement

• Chewing gum or sticky candy

Enamel that has been etched has what appearance when dry?

• Shiny

• Frosty

• Wet

• Slightly yellow

The first step in placing dental sealants is to _____ the surface.

• clean

• dry

• etch

• polish

Properly placed dental sealants are __% effective in protecting against the development of caries in sealed surfaces.

• 70

• 80

• 90

• 100

Sealants are especially useful through the caries-active period, which is

• 0 to 3 years of age.

• 3 to 6 years of age.

• 6 to 15 years of age.

• 15 to 21 years of age.