Deck 43: Restorative and Esthetic Dental Materials

Question 1

The dental restorations created in the laboratory by the dental laboratory technician are classified as _____ restorations.

A)direct
B)indirect
C)provisional
D)amalgam

Answer 1

indirect

Question 2

Intermediate restorative material (IRM)is a:

A)zinc polycarboxylate cement.
B)composite resin.
C)zinc oxide-eugenol cement.
D)ceramic.

Answer 2

zinc oxide-eugenol cement.

Question 3

Which of the following statements is true of the composition of tooth-whitening materials?

A)Most tooth-whitening products are made from a bleach (sodium hypochlorite)-based ingredient.
B)The tooth-whitening solution comes in a single concentration of 37%.
C)When the product contacts the teeth, it allows oxygen to enter the enamel and dentin, which whitens the colored substances.
D)The structure of the tooth is altered by whitening materials.

Answer 3

When the product contacts the teeth, it allows oxygen to enter the enamel and dentin, which whitens the colored substances.

Question 4

The type of ceramic most often used in dentistry for castings is:

A)composite resin.
B)glass ionomer.
C)zinc oxide-eugenol cement.
D)porcelain.

Question 5

In most states,expanded-functions dental assistant duties include:

A)placing IRM.
B)using a high-speed handpiece for cavity preparation.
C)applying a provisional restoration.
D)doing both a and c

Question 6

A noble metal used for cast restorations in dentistry is:

A)palladium.
B)iron.
C)tin.
D)zinc.

Question 7

Dental restorative materials that are applied,while pliable,to a tooth or teeth and can be adapted,carved,and finished are classified as:

A)indirect restorations.
B)direct restorations.
C)crowns and bridges.
D)implants.

Question 8

_____ is added to dental amalgam alloy powder to suppress oxidation.

A)Silver
B)Tin
C)Copper
D)Zinc

Question 9

Which of the following is an advantage to using glass ionomer as a restorative material?

A)Glass ionomer has the ability to bind to teeth mechanically, rather than chemically.
B)Glass ionomer releases fluoride after their final setting.
C)Loss of gloss indicates a proper mix of glass ionomer material.
D)There is no need to avoid contact with water during the mixing procedure for glass ionomer.

Question 10

Which restorative materials are not artistically pleasing?

A)Amalgam
B)Composites
C)Porcelain
D)Both a and b

Question 11

One of the fastest and most cost-effective ways of restoring the esthetic appearance of teeth is:

A)bleaching.
B)porcelain veneers.
C)composite veneers.
D)ceramic crowns.

Question 12

The resin matrix component of composite is dimethacrylate,a fluid-like material also referred to as:

A)quartz.
B)silica.
C)IRM.
D)BIS-GMA.

Question 13

A liquid with high viscosity _____ flow easily and _____ effective in wetting a surface.

A)does; is
B)does; is not
C)does not; is
D)does not; is not

Question 14

The term restorative describes the ability to:

A)remove disease.
B)restore function.
C)be esthetic.
D)remove disease and restore function.

Question 15

The conventional or traditional composites,which contain the largest filler particles and provide the greatest strength,are known as _____ composites.

A)microfilled
B)midfilled
C)hybrid
D)macrofilled

Question 16

An intermediate restorative material should be selected to restore a that tooth has:

A)lost a restoration.
B)a missing cusp.
C)been prepared for a cast restoration.
D)been prepared for a porcelain veneer.

Question 17

The silver filling material used for more than150 years to restore primary and permanent teeth is called:

A)amalgam.
B)composite.
C)glass ionomer.
D)acrylic resin.

Question 18

A(n)_____ is defined as a mixture of two or more metals.

A)alloy
B)amalgam
C)ceramic
D)porcelain

Question 19

Glass ionomer can be used for class _____ restorations.

A)II
B)III
C)IV
D)V

Question 20

_____ is the process by which the resin material is changed from a pliable state into a hardened restoration.

A)Trituration
B)Retention
C)Polymerization
D)Galvanism

Question 21

Chewing is an example of _______ stress.

A)compressive
B)tensile
C)shear
D)all of the above

Question 22

________ occurs when a metal restoration is touched by a fork.

A)Microleakage
B)Galvanic action
C)Sheer stress
D)Corrosion

Question 23

The curing process in which it is the most critical that the materials are mixed and placed within the working and setting times is with:

A)auto-cured materials.
B)light-cured materials.
C)dual-cured materials.
D)none of the above.

Question 24

To ensure an accurate ratio of alloy and mercury,the best protocol to follow is to:

A)use premeasured capsules.
B)measure accurately.
C)reuse capsules.
D)do all of the above.

Question 25

Which is not true of microleakage?

A)It is caused by different rates of expansion and contraction of tooth structure and restorative materials.
B)It is the minute space between the restoration and tooth structure.
C)It occurs rarely.
D)It allows fluid and debris to enter between the restoration and tooth.

Question 26

The process of setting of a material is correctly referred to as:

A)gelling.
B)hardening.
C)curing.
D)triturating.

Question 27

The purpose of packing the amalgam in the cavity preparation is to _____ it.

A)amalgamate.
B)condense
C)carve
D)triturate.

Question 28

All of the following are advantages of amalgam over composite as a restorative material except:

A)cost.
B)moisture control.
C)esthetics.
D)strength.

Question 29

The ADA and the National Institute of Health-Nations Administration _____ the use of amalgam as a posterior restorative material.

A)discourages
B)supports
C)forbids
D)has no opinion on

Question 30

Before they can be marketed,new dental materials must undergo strict evaluation by the:

A)FDA.
B)ADA.
C)MDA.
D)ADAA.

Question 31

Single-spill capsules:

A)contain 600 mg of alloy.
B)are used for small restorations.
C)should be discarded immediately after use.
D)All of the above are correct.

Question 32

For adhesion to take place,_____ film thickness is desired.

A)a thick
B)a thin
C)a medium
D)any

Question 33

Mixing alloy and mercury together to form a mass is called:

A)amalgamation.
B)trituration.
C)condensing.
D)both a and b

Question 34

Corrosion of metal restorative materials:

A)is a reaction that occurs when metal is exposed to products such as temperature, humidity, and saline.
B)is easily removed with polishing agents.
C)is both a and b
D)does not occur.

Question 35

Materials used to restore posterior teeth must be capable of withstanding _____ psi.

A)10,000
B)15,000
C)18,000
D)28,000

Question 36

A properly triturated amalgam mix should:

A)be a hard mass.
B)contain dry particles.
C)be a soft, pliable mass.
D)separate when packed.

Question 37

Retention holds a material in place and seals the structures together.

Question 38

Criteria for new restorative materials states that the material must be:

A)able to protect the tooth and tissues of the oral cavity.
B)easily formed and placed restoring comfort, function, and contour.
C)not capable of irritating tissues or being poisonous.
D)all of the above.

Question 39

Biting off a piece of taffy is an example of _______ stress.

A)compressive
B)tensile
C)shear
D)all of the above

Question 40

All the following statements about nonmercury alloys are true except they:

A)are not sensitive to moisture.
B)are placed after a resin liner.
C)require the application of a sealant over the restoration.
D)All of the above are true.

Question 41

The addition of _______ alloy to glass ionomers produces a product that can be used for core buildups and the repair of fractured cusps and amalgam fillings as well as abutments for overdentures.

A)copper
B)silver-tin
C)gold
D)zinc

Question 42

The curing time of composite restorations is not influenced by:

A)manufacturer's instructions.
B)the base used.
C)thickness or size of restoration.
D)the shade of the restoration.

Question 43

The instrument used to smooth the amalgam surface is:

A)a condenser.
B)a burnisher.
C)a carver.
D)articulating paper.

Question 44

All of the following are steps in finishing a composite restoration except:

A)burnishing.
B)reducing composite.
C)fine finishing with disks and burs.
D)polishing with strips and paste.

Question 45

All of the following are true statements about in-office tooth whitening except it:

A)can usually be done in one treatment.
B)requires a light-accelerated bleach.
C)requires multiple treatments.
D)involves isolation of soft tissue.

Question 46

To adjust the occlusion on a recently place amalgam,the patient should be instructed to bite ______ on the articulating paper.

A)firmly
B)and rotate repeatedly
C)lightly
D)and open and close again

Question 47

A porcelain casting is chosen over other castings because it:

A)has higher strength.
B)has the ability to match natural tooth structure.
C)is a good insulator.
D)is all of the above.

Question 48

Composite resin materials are supplied in all of the following ways except they:

A)are supplied in a lightproof syringe.
B)require mixing.
C)are supplied in various shades.
D)do not require mixing.

Question 49

Composites can be used for class ___ restorations.

A)I, III, and V
B)I and IV
C)II, III, and IV
D)I, II, III, IV, and V

Question 50

Ideally,composite resin shades should be chosen in:

A)daylight.
B)normal ambient light.
C)bright light.
D)operatory light.

Question 51

One difference in the cavity preparation of amalgam versus composite is that:

A)more retention is cut into the prep for composite.
B)amalgam requires the use of a bonding system.
C)composites are more compatible with most dental materials used for bases.
D)composites require the use of a bonding system.