Question 1

Application of fluoride is least effective in preventing caries on which of the following surfaces of posterior teeth?

Accepted Answer

A)   Mesial
B)   Distal
C)   Buccal
D)   Lingual
E)   Occlusal E

Question 2

Which type of fluoride treatment is best to use for a patient with dentinal hypersensitivity (has a neutral pH)?

Accepted Answer

A)   Acidulated phosphate fluoride
B)   Sodium fluoride
C)   Stannous fluoride
D)   A and C
E)   B and C B

Question 3

Sealants polymerized by visible light are ___-component systems that _____ require mixing.

Accepted Answer

A)   one; do
B)   one; do not
C)   two; do
D)   two; do not B

Question 4

Discuss the significance of placing a pit and fissure sealant over existing caries.

Accepted Answer

The answer of Discuss the significance of placing a pit...

Question 5

Which of the following represents the correct sequential order for manipulation of pit and fissure sealants that require etching with phosphoric acid?
1)Cleansing and etching the occlusal surfaces
2)Drying the occlusal surfaces
3)Washing the occlusal surfaces
4)Finishing the occlusal surfaces
5)Polymerizing
6)Applying sealant to the pits and fissures

Accepted Answer

A)   2, 1, 3, 4, 6, 5
B)   1, 2, 4, 3, 5, 6
C)   1, 3, 2, 6, 4, 5
D)   1, 3, 2, 6, 5, 4
E)   3, 1, 2, 6, 4, 5

Question 6

Etchants are generally _____ acid.

Accepted Answer

A)   hydrochloric
B)   acetic
C)   phosphoric
D)   salicylic

Question 7

Neutral fluoride gels contain thickening agents and are considered:

Accepted Answer

A)   viscous
B)   flowable
C)   wetting
D)   thixotropic

Question 8

The results of a clinical study after a single application of a pit and fissure sealant indicated that after five years,sealant effectiveness:

Accepted Answer

A)   increased.
B)   decreased.
C)   remained unchanged.
D)   was tied to oral hygiene.

Question 9

Acid etching of the enamel surface improves the retention of sealant by:

Accepted Answer

A)   cleaning the area to be sealed.
B)   improving the wettability of the enamel.
C)   increasing the surface area.
D)   A, B, and C.
E)   both A and C.

Question 10

Pit and fissure sealants may be used to prevent caries in _____ teeth.

Accepted Answer

A)   deciduous but not permanent
B)   permanent but not deciduous
C)   both deciduous and permanent
D)   neither deciduous nor permanent

Question 11

Fluoride rinses should not be used for:

Accepted Answer

A)   children under 6 years of age.
B)   orthodontic patients.
C)   home preventive care.
D)   all of the above.

Question 12

Which of the following is considered to be a preventive dental material?

Accepted Answer

A)   Dental amalgam
B)   Pit and fissure sealant
C)   Ceramic veneer
D)   Full gold crown

Question 13

Used to help prevent caries in the pits and fissures of posterior teeth,sealants are composed of:

Accepted Answer

A)   polymers.
B)   glass ionomers.
C)   acrylic.
D)   ceramic.

Question 14

Neutral sodium fluoride is used for patients with composites,ceramics,and glass ionomers,because it will not _____ esthetic restorations.

Accepted Answer

A)   stain
B)   etch
C)   marginate
D)   remineralize

Question 15

Which type of fluoride will not etch restorations?

Accepted Answer

A)   Acidulated phosphate fluoride
B)   Stannous fluoride
C)   Sodium fluoride
D)   A and B
E)   B and C

Question 16

During placement of sealant:

Accepted Answer

A)   if an etched tooth becomes contaminated with saliva, the etching and rinsing steps need not be repeated.
B)   the self-cured sealant is cured with a light source for at least 20 seconds.
C)   moisture enhances retention of the sealant by the fissure.
D)   a small cotton pellet may be used to remove sealant that has failed to polymerize because of exposure to air.
E)   if a fluoride treatment is used in conjunction with the pit and fissure sealant, the fluoride treatment is applied before the sealant has polymerized.

Question 17

Which type of fluoride can stain restorations?

Accepted Answer

A)   Stannous fluoride
B)   Sodium fluoride
C)   Acidulated phosphate fluoride
D)   A, B, and C
E)   A and C

Question 18

A mouth protector thickness of _____ mm of material over incisal edges and cusps of teeth is recommended for best protection and acceptable comfort.

Accepted Answer

A)   0.5
B)   1.0
C)   2.0
D)   4.0
E)   8.0

Question 19

It can be difficult to fill a fissure completely with sealant due to _____ trapped in the fissure.

Accepted Answer

A)   air
B)   debris
C)   moisture
D)   all of the above

Question 20

As the thickness of mouth protector material increases,the energy forces _____,and the transmitted forces _____.

Accepted Answer

A)   increase; decrease
B)   increase; increase
C)   decrease; increase
D)   decrease; decrease

Exam 3: Preventive Dental Materials