Deck 44: Dental Liners, Bases, and Bonding Systems

Question 1

A desensitizer could be indicated for which of the following procedures?

A)Amalgam restoration
B)Sealants
C)Provisional coverage
D)Fluoride application

Answer 1

Amalgam restoration

Question 2

The smear layer is composed of:

A)particularly dense enamel at the dentino-enamel junction.
B)a very thin layer of debris remaining on the dentin after cavity preparation.
C)an oxygen-inhibited layer on the surface of cut dentin.
D)a very porous layer of cut ends of dentinal tubules.

Answer 2

a very thin layer of debris remaining on the dentin after cavity preparation.

Question 3

Dental varnish is used in the cavity preparation to:

A)seal dentinal tubules.
B)reduce leakage around a restoration.
C)stimulate growth of reparative dentin.
D)do both a and b

Answer 3

do both a and b

Question 4

The restorative material indicated for use when decay has extended into or close to the pulp is:

A)liner/varnish.
B)base/desensitizer.
C)bonding agent.
D)any of the above.

Question 5

Which of the following would be the material of choice as an insulating base under a composite restoration?

A)Zinc phosphate
B)Zinc oxide eugenol
C)Polycarboxylate
D)Both a and c

Question 6

Failure to place a protective base under a restoration can result in:

A)a premature contact on the restorative material.
B)occlusal trauma.
C)postoperative sensitivity and damage to the pulp.
D)premature loss of the restorative material.

Question 7

Patients may feel sensitivity after the placement of a restoration:

A)immediately.
B)after a month.
C)for several months.
D)at any time.

Question 8

Etchant removes the _____ layer in preparation for bonding.

A)varnish
B)cavity liner
C)smear
D)sclerosing

Question 9

Desensitizers used to help prevent hypersensitivity should be used:

A)in large amounts.
B)in contact with soft tissue.
C)to seal all affected dentinal tubules.
D)All of the above are correct.

Question 10

A dental liner is placed:

A)along inside of cavity walls.
B)mesial and distal of the tooth.
C)in the deepest area of the tooth preparation.
D)along the interproximal margin.

Question 11

Calcium hydroxide liner is a frequently used liner because it:

A)stimulates production of secondary dentin.
B)can be used with only composite resin material.
C)acts as a base as well as a liner.
D)does not require the use of a filling material.

Question 12

Which of the following would be the material of choice as an insulating base as well as a sedative base?

A)Zinc phosphate
B)Zinc oxide eugenol
C)Polycarboxylate
D)All of the above

Question 13

A necessary step in preparation for dentin bonding is:

A)application of an etchant.
B)addition of the smear layer.
C)removal of the smear layer.
D)both a and c

Question 14

Insulating base material should cover the entire _______ to a thickness of _____ mm.

A)cavity preparation; 1 to 2
B)pulpal floor; 1 to 2
C)cavity preparation; 2 to 3
D)pulpal floor; 3 to 4

Question 15

Acid etching uses etchant containing _____ acid.

A)sulfuric
B)hydrochloric
C)phosphoric
D)citric

Question 16

Materials that are versatile in their uses,such as for specialized dental bases,include:

A)dental cements.
B)dental varnishes.
C)dental liners.
D)calcium hydroxide.

Question 17

An example of a biological pulpal stimuli is:

A)changes from hot and cold coming into contact with the tooth.
B)traumatic occlusion, which occurs when a person's "bite" does not occlude properly.
C)acidic materials reaching pulpal tissues.
D)bacteria from saliva coming into contact with pulpal tissues.

Question 18

Types of pulpal stimuli can be:

A)physical.
B)mechanical.
C)chemical or biologic.
D)all of the above.

Question 19

An example of enamel bonding is the placement of a:

A)dental sealant.
B)dental varnish.
C)calcium hydroxide.
D)dental base.

Question 20

Calcium hydroxide:

A)cannot be placed under direct composite resins because it will inhibit polymerization.
B)stimulates the production of reparative dentin.
C)functions as a thick base to support extensive restorations.
D)consists of a resin in an organic solvent.

Question 21

Bonding agents or adhesives:

A)can be light-cured.
B)must be used after etching.
C)are available as self-cured.
D)are all of the above.

Question 22

You are asked to select a base for a deep cavity preparation because of extensive decay.Which would you select?

A)Zinc oxide-eugenol
B)Zinc phosphate
C)Polycarboxylate
D)Any of the above

Question 23

Which of the following materials used as a base needs to set at least 5 minutes before placing the restoration?

A)Polycarboxylate cement
B)ZOE
C)Zinc phosphate cement
D)Desensitizing materials

Question 24

Zinc phosphate cement should be mixed:

A)on a cool glass slab.
B)on a warm glass slab.
C)on a paper pad.
D)quickly.

Question 25

ZOE mixed to a base consistency should not be:

A)thick and putty-like.
B)rolled into a one large ball.
C)placed to cover the entire pulpal floor.
D)tapped lightly into the preparation with a condenser.

Question 26

All of the following statements are true of the process of removing the smear layer in dentin bonding except:

A)during preparation, thousands of dentin tubules are cut.
B)open ends of dentin tubules lead to sensitivity.
C)all moisture must be removed to assist in adhesion.
D)completely drying the tooth structure will harm the tooth.

Question 27

A properly etched tooth will appear:

A)shiny.
B)pitted.
C)frosted.
D)as none of the above.

Question 28

You are asked to select a protective base for insulation that is nonirritating under a composite restoration.Which would you select?

A)Zinc oxide-eugenol
B)Zinc phosphate
C)Polycarboxylate
D)Any of the above

Question 29

When a varnish is used,it is always used before other materials.

Question 30

Which of the following is true of the bonding process?

A)It can be performed on only the dentin.
B)Contamination will not hinder the bond.
C)Avoid overdrying or desiccating the tooth; the product works best on a slightly moist tooth structure.
D)Using a small amount of bonding material is better than using too much.

Question 31

Dental bonding is also referred to as:

A)dental adhesion.
B)a dental liner.
C)a desensitizer.
D)none of the above.

Question 32

Varnish should be placed on the ______ of the preparation.

A)walls
B)floor
C)margins
D)All of the above are correct.

Question 33

Varnish should be placed:

A)in one thick layer.
B)in two light coats.
C)before a sedative base.
D)none of the above.

Question 34

Etching for dental bonding is done with:

A)phosphoric acid.
B)ammonia.
C)isopropyl alcohol.
D)hydrogen peroxide.

Question 35

Which of the following is not a use of fluoride varnish?

A)Treatment of hypersensitive cervical areas
B)Dentin sealant
C)Luting agent
D)Topical fluoride application

Question 36

All of the following statements are true about the application of etchant material except:

A)the tooth must be free of debris.
B)the tooth must be thoroughly dried.
C)the etchant gel is placed only where needed.
D)it is cured for 15 to 30 seconds.

Question 37

Thermal changes from hot,cold,or electrical energy created by other metals coming into contact with the tooth are defined as which type of pulpal stimuli?

A)Biological
B)Mechanical
C)Physical
D)Chemical

Question 38

Desensitizer should be placed:

A)after thoroughly drying the tooth.
B)on enamel only.
C)and dried immediately.
D)after rinsing and lightly drying the tooth.