Deck 3: Preventive Dental Materials

Question 1

Approximately ____% of dental caries in children 5 to 17 years of age involves pits.

A) 11
B) 24
C) 49
D) 74
E) 84

Answer 1

84

Question 2

How does acid etching of the enamel surface improve the retention of a sealant?

A) Decreases the surface area
B) Cleans the area to be sealed
C) Improves the wettability of the enamel
D) A, B, and C are all correct.
E) Only B and C are correct.

Answer 2

Only B and C are correct.

Question 3

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

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

Answer 3

Sodium fluoride

Question 4

Which of the following statements is true about 4-minute versus 1-minute application of a fluoride treatment? A 4-minute application is

A) not currently recommended.
B) less effective than a 1-minute application.
C) equally effective as a 1-minute application.
D) more effective than a 1-minute application.

Question 5

Fluoride varnishes are available that contain ________ fluoride.

A) 1% sodium
B) 5% sodium
C) 1% stannous
D) 5% stannous
E) 2.34% acidulated phosphate-fluoride (APF)

Question 6

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

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

Question 7

Which type of fluoride will not etch restorations?

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

Question 8

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

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

Question 9

Which type of fluoride can stain restorations?

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

Question 10

What is the purpose of benzoyl peroxide in sealant materials?

A) Monomer
B) Inorganic filler
C) Initiator of a two-component sealant system
D) Initiator of a one-component sealant system
E) Organic amine accelerator of a one-component sealant system

Question 11

Which of the following statements is true of the manipulation of fluoride foams and gels during their application for office fluoride treatment?

A) The troughs of the maxillary and mandibular trays should be completely filled with the gel.
B) The teeth are to be kept as free from saliva as possible before application of the tray.
C) After application of the gel, the patient is instructed not to eat for 4 hours.
D) Rinses are recommended for children under 6 years old.
E) They should be applied prior to dental prophylaxis.

Question 12

Etchants are generally _____ acid.

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

Question 13

A preventive resin restoration involves the use of _____ to restore the teeth.

A) flowable composite
B) hybrid ionomer
C) glass ionomer
D) compomer
E) ceramic

Question 14

Which of the following statements is true about pits and fissures?

A) A smooth-based depression on the occlusal surface of a tooth.
B) The result of noncoalescence of dentin during tooth formation.
C) The result of noncoalescence of enamel during tooth formation.
D) May be cleansed by the excursion of food or a toothbrush bristle.

Question 15

What does thixotropic mean?

A) Viscosity of the material is changeable.
B) Material will adhere to an intraoral surface.
C) Grain size of cast gold is affected by quenching.
D) Setting time of the material is affected by glove powder.

Question 16

Which of the following materials is the chemistry of sealants most similar to?

A) Composite restorative material
B) Acidulated phosphate-fluoride
C) Ceramic restorative material
D) Glass ionomer cement

Question 17

Current evidence indicates that sealants should not be used on the teeth of which type of patient?

A) Cooperates in maintaining good oral hygiene
B) Has pits and fissures on occlusal surfaces
C) Has been free of caries for several years
D) Has no proximal lesions

Question 18

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

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

Question 19

What did the results of a 5-year clinical study about sealant effectiveness, after a single application of a pit and fissure sealant, indicate?

A) Increased
B) Decreased
C) Remained unchanged
D) Was tied to oral hygiene

Question 20

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

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

Question 21

Which of the following statements is true regarding placement of a sealant?

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 22

What should the operator do if teeth become contaminated with saliva after they are etched?

A) Re-etch, rinse, and dry.
B) Rinse the area again and dry it.
C) Use the high-velocity suction to dry.
D) Add more cotton rolls for moisture control.

Question 23

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

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

Question 24

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

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 25

Which statement(s) is/are true of custom-made mouth protectors?

A) Athletes prefer the custom-made mouth protector over mouth-formed and stock mouth protectors.
B) Custom-made mouth protectors are less expensive than mouth-formed or stock mouth protectors.
C) Custom-made mouth protectors are less likely to interfere with speech than mouth-formed or stock mouth protectors.
D) A and B are correct.
E) A and C are correct.

Question 26

Eighty-five percent of dental caries on posterior teeth of children ages 5 to 17 occur on which surface?

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

Question 27

How should a mouth protector be stored when not in use?

A) In a cool, dry place
B) In water to prevent shrinkage
C) In the case provided by the dentist
D) In a denture cleaner to remove any bacteria present

Question 28

Which light spectrum is used to polymerize sealant materials?

A) Incandescent
B) Fluorescent
C) Ultraviolet
D) Visible

Question 29

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

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

Question 30

What is the purpose of etching enamel prior to placing a sealant?

A) Improve wetting
B) Cleaning the enamel surface
C) Makes the surface smooth and uniform.
D) A and B are correct

Question 31

What is the optimum mixing time for a two-step, self-curing, sealant material?

A) 5 to 10 seconds
B) 10 to 15 seconds
C) 15 to 20 seconds
D) 20 to 25 seconds

Question 32

Which composition is used to help prevent caries in the pits and fissures of posterior teeth?

A) Glass ionomers
B) Polymers
C) Acrylic
D) Ceramic

Question 33

Of the following, which would not be a sign of mouth-protector deterioration?

A) Tearing
B) Bite-through
C) Discoloration
D) General wear

Question 34

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

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

Question 35

Teeth should be etched with a _____ phosphoric solution for _____ seconds.

A) 18%; 15
B) 23%; 30
C) 37%; 60
D) 42%; 45

Question 36

Which type of fluoride may be responsible for depositing stains on teeth and restorations?

A) Acidulated phosphate
B) Neutral sodium
C) Stannous
D) Sodium

Question 37

Surveys report that orofacial injuries most frequently occur in which sport when the athlete is not wearing a mouth protector?

A) Basketball
B) Football
C) Hockey
D) Skiing
E) Golf

Question 38

How many seconds should the light-activated sealant material be polymerized with the curing wand?

A) 10
B) 15
C) 20
D) 25

Question 39

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

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

Question 40

Which of the following terms describes a neutral fluoride gel containing thickening agents?

A) Wetting
B) Viscous
C) Flowable
D) Thixotropic

Question 41

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

Question 42

Identify four criteria for not using a pit and fissure sealant.

Question 43

Compare and contrast the three types of mouth protectors available for athletes to use.

Question 44

List the steps for cleaning a mouth protector after each use.