Chapter 59, final review

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

A. 70

B. 80

C. 90

D. 100

D. 100

Sealants are indicated for which areas?

A. Cervical one third of any tooth

B. Posterior but not anterior teeth

C. The smooth surfaces of teeth but not pits and fissures

D. Pits and fissures

D. Pits and fissures

Why are sealants contraindicated with proximal caries?

A. Proximal decay will spread to the occlusal surface.

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

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

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

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

The highest risk period for decay occurs within the first ___ years of eruption.

A. 3

B. 5

C. 7

D. 9

A. 3

What is the most common cause of sealant loss?

A. Use of unfilled material

B. Use of outdated material

C. Moisture contamination during placement

D. Chewing gum or sticky candy

C. Moisture contamination during placement

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

A. etch

B. isolate

C. clean

D. prime

C. clean

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

A. Cold-cured

B. Light-cured

C. Self-cured

D. Dual-cured

B. Light-cured

Self-cured sealant materials are supplied as a two-part system that includes what components?

A. A base

B. A catalyst

C. Filled resins

D. Both A and B

D. Both A and B

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

A. Citric acid

B. Phosphoric acid

C. Eugenol

D. Pumice

B. Phosphoric acid

Enamel that has been etched has what appearance when dry?

A. Shiny

B. Frosty

C. Wet

D. Slightly yellow

B. Frosty

Sealant material should not be stored in proximity to ____-containing products.

A. acrylate

B. eugenol

C. sodium bicarbonate

D. Bis-GMA

B. eugenol

What is the primary reason that few children are protected by dental sealants?

A. They are not recommended by the American Dental Associated.

B. They have not been shown to reduce decay significantly.

C. There is a lack of public awareness.

D. They are not effective for prevention of pit and fissure decay in posterior teeth.

C. There is a lack of public awareness.

Using a small round or needle-shaped bur or diamond rotary instrument prior to placement of a dental sealant can allow for inspection for the presence of caries, and

A. reduce the amount of sealant required to protect fissures and grooves in the tooth.

B. allow the expanded-functions dental assistant (EFDA) to apply sealant without the dentist being present in the office.

C. provide for increased retention of the sealant material.

D. eliminate the need to evaluate the occlusion following placement of sealant.

C. provide for increased retention of the sealant material.

Which statement describes why pits and fissures are more susceptible to decay than smooth surfaces?

A. They do not benefit from the effects of fluoride.

B. The enamel at the base of fissures is thinner.

C. Saliva cannot clean deep pits and fissures.

D. All of the above are reasons pits and fissures are susceptible.

D. All of the above are reasons pits and fissures are susceptible.

Which statement is correct regarding a properly placed sealant over small initial carious lesions?

A. The decay will continue to develop under the sealant.

B. Bacteria can survive under a sealant.

C. The number of bacteria in small carious lesions decreases over time.

D. The number of bacteria in small carious lesions increases over time.

C. The number of bacteria in small carious lesions decreases over time.

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

A. 0 to 3 years of age

B. 3 to 6 years of age

C. 6 to 15 years of age

D. 15 to 21 years of age

C. 6 to 15 years of age

Which teeth would be the most likely candidates for sealants?

A. Premolars

B. Teeth that are well coalesced

C. Teeth that have been erupted for 6 years

D. Primary molars with deep pits and fissures

D. Primary molars with deep pits and fissures

Which statement represents an indication for sealants?

A. Presence of small interproximal decay

B. A partially erupted tooth

C. The tooth on the opposite side of the mouth has similar pits and fissures

D. Patient has adequate fluoride program

C. The tooth on the opposite side of the mouth has similar pits and fissures

What is an advantage of tinted sealant material over clear or colorless material?

A. It is easier to see during application.

B. It aids in recall checks for sealant retention.

C. It is stronger.

D. Both A and B are advantages.

D. Both A and B are advantages.

Which statement is correct when comparing filled sealant material with unfilled sealant material?

A. It requires occlusal adjustment.

B. It has a lower wear rate.

C. It may be visible on radiographs.

D. All of the above are correct statements.

D. All of the above are correct statements.

Which technique error most commonly leads to sealant failure?

A. Moisture

B. Fail to cure properly

C. Not using enough material

D. Using too much material

A. Moisture

What item can be used in interpoximal space to prevent the etchant from contracting adjacent teeth during the etching procedure?

A. Dental floss

B. Wedges

C. Mylar strip

D. Separating disk

C. Mylar strip

Which technique is sometimes used before sealant application to open fissures and remove slight decay?

A. Rubber cup polishing

B. Bristle-brush polishing

C. Microabrasion

D. Scaling

C. Microabrasion

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

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

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

C. Prepare the tooth for a composite restoration.

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

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

What is the claimed benefit of fluoride-released sealant materials?

A. They will prevent future caries development even if the sealant is lost.

B. They create a fluoride-rich layer that may make pits and fissures more resistant to decay.

C. They aid in rematerializing incipient decay.

D. Both B and C are benefits.

D. Both B and C are benefits

Clinical researchers have shown that sealing the margins of amalgam and composite restorations with unfilled resins will do which of the following? (Select all that apply.)

A. Promote microleakage

B. Arrest the progression of caries

C. Preserve existing restorations

D. Preserve tooth structure

B. Arrest the progression of caries

C. Preserve existing restorations

D. Preserve tooth structure