Question 1

Which is NOT a barrier to the placement of sealants?&#10;A)Legal restrictions on dental providers&#10;B)Patient's cost&#10;C)Shortage of dentists accepting Medicaid&#10;D)Lack of consumer knowledge

Accepted Answer

B)Although a patient's cost could influence a decision to have sealants placed,this is based on individual circumstances.The other three barriers are generalizations for the population as a whole.

Question 2

What is defined as finger-like depressions created by the etching solution?&#10;A)Tags&#10;B)Tubules&#10;C)Residue&#10;D)Damaged tooth structure

Accepted Answer

A)When the resin sealant flows over the prepared surface,it penetrates the finger-like depressions created by the etching solution.The projections of resins in the etched area are called tags.

Question 3

When is the BEST time to place a sealant?&#10;A)Once all the permanent molars have erupted&#10;B)As the permanent dentition erupts&#10;C)When the child begins consuming sugars&#10;D)If the child begins to develop caries

Accepted Answer

B)Resin sealants are retained better on recently erupted teeth than on teeth with a more mature surface.They are also retained better on first molars than on second molars,and are better retained on mandibular than on maxillary teeth.

Question 4

Where do the majority of caries occur in the oral cavity?&#10;A)Occlusal surfaces&#10;B)Interproximally&#10;C)Areas of recession&#10;D)Incisal edges

Accepted Answer

A)The majority of all carious lesions that occur in the mouth occur on the occlusal surfaces.

Question 5

Deep,irregular pits and fissures offer a much more favorable surface contour for sealant retention compared with broad,shallow fossae.The deeper fissures protect the resin sealant from the forces occurring as a result of masticatory movements.

A)Both statements are true.
B)Both statements are false.
C)First statement is true,second statement is false.
D)First statement is false,second statement is true.

Accepted Answer

A)Both these statements are true.In addition to this,the possibility of caries development increases as the fissure depth and slope of inclined planes increase.

Question 6

When is a sealant contraindicated?&#10;A)When there is incipient caries on the occlusal surfaces&#10;B)When there is a presence of a large occlusal restoration&#10;C)When there is dark staining in the pits and fissure&#10;D)When there is a high caries rate

Accepted Answer

B)A dental sealant is contraindicated if: patient behavior does NOT permit use of dry-field techniques throughout the procedure,an open,frank,carious lesion exists on the same tooth,caries exist on other surfaces of the same tooth in which restoration will disrupt an intact sealant,and a large occlusal restoration is already present.

Question 7

What is the cost difference in placing a sealant versus a restoration?&#10;A)Costs are equal&#10;B))5 times more&#10;C)1)3 times more&#10;D)1)6 times more

Accepted Answer

D)In an office setting,it is estimated to cost 1.6 times more to treat a tooth than to seal it.

Question 8

What is the main advantage of a color sealant?&#10;A)Higher fluoride content&#10;B)Visualization&#10;C)Easier manipulation of the material&#10;D)Less technique sensitivity

Accepted Answer

B)The colored products permit a more precise placement of the sealant,with the visual assurance that the periphery extends halfway up the inclined planes.A clear sealant may be considered more esthetically acceptable.

Question 9

What is the time frame in which a sealant will fail after initial placement if faulty technique was used?&#10;A)3 months&#10;B)6 months&#10;C)1 year&#10;D)3 years

Accepted Answer

A)After 3 months,the rapid loss of sealants is probably caused by faulty technique in placement.

Question 10

How long should etch remain on the tooth prior to rinsing?&#10;A)5 seconds&#10;B)10-15 seconds&#10;C)20-30 seconds&#10;D)40-50 seconds

Accepted Answer

C)A gel etchant would be placed directly on the tooth by the supplied syringe/canula delivery system.The etch time is typically 20-30 seconds.

Deck 16: Dental Sealants