Deck 43: Restorative and Esthetic Dental Materials

Question 1

If a tooth has _____,an intermediate restorative material should be selected.

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

Answer 1

lost a restoration

Question 2

_____ is a noble metal used for cast restorations in dentistry.

A)Palladium
B)Iron
C)Tin
D)Zinc

Answer 2

Palladium

Question 3

_____ 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

Answer 3

Polymerization

Question 4

Glass ionomer can be used for class _____ restorations.

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

Question 5

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

A)direct restorations.
B)indirect restorations.
C)provisional restorations.
D)amalgams.

Question 6

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

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

Question 7

In most states,an expanded-functions dental assistant may perform which of the following functions?

A)Placing IRM
B)Using a high-speed handpiece for cavity preparation
C)Applying a provisional restoration
D)Both a and c

Question 8

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

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

Question 9

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 10

The term 'restorative' describes the ability to:

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

Question 11

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.

Question 12

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 13

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 14

Which restorative materials are not artistically pleasing?

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

Question 15

Intermediate restorative material (IRM) is a:

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

Question 16

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 17

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 18

The silver filling material used for over 150 years to restore primary and permanent teeth is called:

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

Question 19

Which of the following are advantages 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 20

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 21

Criteria for new restorative materials include that the material is:

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 are criteria for new restorative materials.

Question 22

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 ________ materials.

A)auto-cured
B)light-cured
C)dual-cured
D)none is more critical than another.

Question 23

Which is not true of nonmercury alloys?

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

Question 24

For adhesion to take place,a _______ film thickness is desired.

A)thick
B)thin
C)medium
D)it doesn't matter

Question 25

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)both a and b.
D)does not occur.

Question 26

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

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

Question 27

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 28

New dental materials must undergo strict evaluation by _____ before they
Can be marketed.

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

Question 29

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

Question 30

Chewing is an example of _______ stress.

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

Question 31

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 32

Which is not an advantage of amalgam over composite?

A)Cost
B)Moisture control
C)Esthetics
D)Strength

Question 33

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.

Question 34

_______ is(are) the process(es) of mixing alloy and mercury together to form a mass.

A)Amalgamation
B)Trituration
C)Condensing
D)Both a and b

Question 35

The purpose of _________ is to pack the amalgam in the cavity preparation.

A)amalgamation
B)condensing
C)carving
D)trituration

Question 36

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 37

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

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

Question 38

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 39

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

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

Question 40

To ensure an accurate ratio of alloy and mercury,you should:

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

Question 41

Which is not a step in finishing a composite restoration?

A)Burnishing
B)Reduction of composite
C)Fine finishing with disks and burs
D)Polishing with strips and paste

Question 42

A _______ is used to smooth the amalgam.

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

Question 43

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 44

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)all of the above.

Question 45

Which will not influence the curing time of composite restorations?

A)Manufacturer's instructions
B)The base used
C)Thickness or size of restoration
D)The shade of the restoration

Question 46

Ideally,composite resin shades should be chosen in:

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

Question 47

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 48

Which is not true regarding how composite resin materials are supplied?

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

Question 49

A difference in the cavity preparation of amalgam versus composite is:

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.

Question 50

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 51

Which is not true of in-office tooth whitening?

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