Chapters Restorative And Esthetic Dental Materials.
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The demand for aesthetic in dentistry has created a variety of restorative materials meant for dental restoration. Ceramic restorations for instance are so natural looking and the dentists need to carefully evaluate what they observe in a patients mouth. Take up the quiz on chapters restorative and esthetic dental materials to learn more.
- 1.One of the most common restorative materials in dentistry is composite.
- A.
True
- B.
False
- 2.Direct restorations include amalgam and gold crowns.
- A.
True
- B.
False
- 3.Composite resins are stronger than amalgam or gold.
- A.
True
- B.
False
- 4.Polymerization is the process in which the resin material is changed from a pliable state into a hardened restoration.
- A.
True
- B.
False
- 5.Macrofilled composites contain the smallest filler particles providing the least strength.
- A.
True
- B.
False
- 6.One reason temporary restorations are used is to maintain the function and esthetics of a tooth until a permanent restoration can be placed.
- A.
True
- B.
False
- 7.Common uses of Intermediate Restorative Material include restorative emergencies and restoration of primary teeth.
- A.
True
- B.
False
- 8.Indirect restorations materials include gold alloys and ceramic materials.
- A.
True
- B.
False
- 9.Porcelain material is chosen as a restorative material because the shading matches tooth color well.
- A.
True
- B.
False
- 10.For longer than 150 years, billions of dental amalgam fillings has been used to restore decayed teeth.
- A.
True
- B.
False
- 11.The types of supplemental materials selected by the dentist will determine how the tooth will be prepared.
- A.
True
- B.
False
- 12.Calcium hydroxide is NOT a bonding material.
- A.
True
- B.
False
- 13.The application of a varnish helps to seal the dentinal tubules.
- A.
True
- B.
False
- 14.Dental bases are used to provide pulpal protection in the following ways: Protective bases, insulating bases, and sedative bases.
- A.
True
- B.
False
- 15.With the use of bonding materials, it is now possible to bond restorative materials to enamel and dentin.
- A.
True
- B.
False
- 16.Acid etching is a technique in which acid is placed on either the enamel or gingiva to remove the smear layer in preparation for bonding.
- A.
True
- B.
False
- 17.An example of enamel bonding is a sealant or orthodontic bracket.
- A.
True
- B.
False
- 18.The mixing time for dental cements is the same no matter which materials you are using.
- A.
True
- B.
False
- 19.Glass ionomer cement MUST be mixed on a cool glass slab.
- A.
True
- B.
False
- 20.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.
- 21.________ occurs when a metal restoration is touched by a fork.
- A.
Microleakage
- B.
Galvanic action
- C.
Sheer stress
- D.
Corrosion
- 22.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.
- 23.
- 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.
- 24.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
- 25.Glass ionomer can be used for class _____ restorations.
- A.
II
- B.
III
- C.
IV
- D.
V
- 26.Ideally, composite resin shades should be chosen in:
- A.
Daylight.
- B.
Normal ambient light.
- C.
Bright light.
- D.
Operatory light.
- 27._____ 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
- 28._____ is added to dental amalgam alloy powder to suppress oxidation.
- A.
Silver
- B.
Tin
- C.
Copper
- D.
Zinc
- 29.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
- 30.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.
- 31.New dental materials must undergo strict evaluation by _____ before they can be marketed.
- A.
FDA
- B.
ADA
- C.
MDA
- D.
ADAA
- 32.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
- 33.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.
- 34.The term ‘restorative’ describes the ability to:
- A.
Remove disease.
- B.
Restore function.
- C.
Be esthetic.
- D.
Both a and b.
- 35.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.
- 36.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.
- 37.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.
- 38.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
- 39.Varnish should be placed on the ______ of the preparation.
- A.
Walls
- B.
Floor
- C.
Margins
- D.
All of the above
- 40.Etching for dental bonding is done with:
- A.
Phosphoric acid.
- B.
Ammonia.
- C.
Isopropyl alcohol.
- D.
Hydrogen peroxide.
- 41.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.
- 42.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.
- 43.A desensitizer could be indicated for which of the following procedures?
- A.
Amalgam
- B.
Sealants
- C.
Provisional coverage
- D.
Fluoride
- 44.Bonding agents or adhesives:
- A.
Can be light-cured.
- B.
Must be used after etching.
- C.
Are available as self-cured.
- D.
All of the above.
- 45.Insulating base material should cover the entire _______ to a thickness of _____ mm.
- A.
Cavity preparation; 1-2
- B.
Pulpal floor; 1-2
- C.
Cavity preparation; 2-3
- D.
Pulpal floor; 3-4
- 46.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.
- 47.Dental bonding is also referred to as a:
- A.
Dental adhesion.
- B.
Dental liner.
- C.
Desensitizer.
- D.
None of the above.
- 48.Etchant removes the _____ layer in preparation for bonding.
- A.
Varnish
- B.
Cavity liner
- C.
Smear
- D.
Sclerosing
- 49.If a varnish is used, it is always used before other materials.
- A.
True
- B.
False
- 50.
- A.
Polycarboxylate cement
- B.
ZOE
- C.
Zinc phosphate cement
- D.
Desensitizing materials
- 51.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 bases
- 52.If decay has extended into or close to the pulp, which material(s) may be indicated?
- A.
Liner/varnish
- B.
Base/desensitizer
- C.
Bonding agent
- D.
Any or all of the products
- 53.Types of pulpal stimuli may be:
- A.
Physical.
- B.
Mechanical
- C.
Chemical or biologic.
- D.
All of the above
- 54.Which of the following is an example of biological pulpal stimuli?
- A.
Changes from hot and cold coming into contact with the tooth
- B.
Traumatic occlusion, which occurs when a persons bite does not occlude properly
- C.
Acidic materials reaching pulpal tissues
- D.
Bacteria from saliva coming into contact with pulpal tissues
- 55.Protective bases are placed when it is necessary to protect the pulp before the restoration is placed, because without this protection there may be:
- 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.
- 56.Varnish should be placed:
- A.
In one thick layer.
- B.
In two light coats.
- C.
Before a sedative base.
- D.
None of the above.
- 57.
- 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.
- 58.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.
- 59.Which of the following will NOT help to dissipate heat when mixing zinc phosphate cement?
- A.
Mixing on a cool glass slab
- B.
Adding small increments
- C.
Spatulate over a large area of the slab
- D.
Mixing quickly
- 60.
- A.
Dispensing powder first and then liquid
- B.
Dispensing the liquid first and then powder
- C.
Dispense liquid when it is time to mix the cement
- D.
Keeping the lid on the liquid
- 61.Which cement inhibits recurrent decay?
- A.
Zinc phosphate
- B.
Glass ionomer
- C.
Zinc oxide-eugenol
- D.
Composite resin
- 62.Which is NOT true of the preparing the tooth for a composite resin cementation?
- A.
Etch enamel and dentin for 15 seconds.
- B.
Rinse completely.
- C.
Blot the tooth with a cotton pellet.
- D.
Dry the tooth completely.
- 63.The cement that gives off an exothermic reaction and must be spatulated over a wide area of a cool, dry, thick glass slab is:
- A.
Zinc oxide-eugenol (ZOE).
- B.
Polycarboxylate.
- C.
Zinc phosphate
- D.
Composite resin.
- 64.The dental assistant may have the responsibility of placing the mixed cement into the casting. The cement should be loaded:
- A.
Into the casting until it is overflowing.
- B.
So that a thin lining covers all internal walls of the casting.
- C.
To the top margin of the crown so that it is full.
- D.
Only on the very bottom of the crown.
- 65.Which of the following cement types is(are) the most versatile and the least irritating to the pulp?
- A.
ZOE cement
- B.
Glass ionomer cement
- C.
Composite resin cement
- D.
Both a and b
- 66.Which of the following is the most important rule to follow when preparing dental cements?
- A.
Working as quickly as possible
- B.
Following the manufacturer's instructions
- C.
Making the mix as thick as possible
- D.
Doing all of the above
- 67.A _____ is classified as a type I dental cement and acts as an adhesive to hold together the indirect restoration and the tooth structure.
- A.
Temporary cement
- B.
Luting cement
- C.
Provisional cement
- D.
Liner
- 68.If excess cement is not removed from in and around the gingival margin and sulcus of the tooth, the cement can:
- A.
Dissolve out from under the crown, which then may be lost or swallowed.
- B.
Irritate the area and cause inflammation and discomfort.
- C.
Demineralize the enamel.
- D.
Create an occlusal prematurity.
- 69.When dispensing most cement, generally the powder should be _______ before dispensing.
- A.
Packed
- B.
Fluffed
- C.
Measured
- D.
Both b and c
- 70.A cement frequently used for cementing provisional coverage is:
- A.
Type I .
- B.
Type II ZOE.
- C.
Composite resin.
- D.
Glass ionomer.
- 71.Permanent cements are used for luting all except:
- A.
Laminate veneers.
- B.
Orthodontic fixed appliances.
- C.
Provisionals.
- D.
Cast restorations.
- 72.Polycarboxylate cement:
- A.
Forms a mechanical bond to tooth structure.
- B.
Is generally used as a temporary sedative cement.
- C.
Is less irritating to the pulp than zinc phosphate cement.
- D.
Must be mixed on a glass slab.
- 73.Which is the correct cementing consistency for zinc phosphate cement?
- A.
The cement should be soupy.
- B.
The cement should string up and break about 1 inch from the slab.
- C.
The mix should be slightly tacky.
- D.
The mix should form in a ball.
- 74.To increase the working time of glass ionomer it can be mixed:
- A.
Quickly.
- B.
Slowly.
- C.
On a glass slab.
- D.
None of the above.
- 75.When removing cement from a casting, never:
- A.
Use a explorer.
- B.
Use a firm fulcrum.
- C.
Move instruments in a horizontal direction.
- D.
Pull excess cement down away from the casting.
- 76.Which is NOT true of the preparing the tooth for a composite resin cementation?
- A.
Etch enamel and dentin for 15 seconds.
- B.
Rinse completely.
- C.
Blot the tooth with a cotton pellet.
- D.
Dry the tooth completely.
- 77.Which of the following is the most important rule to follow when preparing dental cements?
- A.
Working as quickly as possible
- B.
Following the manufacturer's instructions
- C.
Making the mix as thick as possible
- D.
Doing all of the above
- 78.Which type(s) of cements can be light-cured?
- A.
Composite resin
- B.
Glass ionomer
- C.
ZOE
- D.
Both a or b
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