Question 1

Which of the following is the most popular direct esthetic dental restorative material?

Accepted Answer

A)  Composite 
B)  Compomer 
C)  Glass ionomer 
D)  Hybrid ionomer 
A)  Composite 
B)  Compomer 
C)  Glass ionomer 
D)  Hybrid ionomer A

Question 2

How can postoperative sensitivity be avoided?

Accepted Answer

A)  Placing larger layers of material 
B)  Using a high-strength base 
C)  Using a low-strength liner 
D)  All of the above are correct. 
E)  Only B and C are correct. 
A)  Placing larger layers of material 
B)  Using a high-strength base 
C)  Using a low-strength liner 
D)  All of the above are correct. 
E)  Only B and C are correct. D

Question 3

Compare and contrast direct placement resins to laboratory resins.

Accepted Answer

Composite resin materials have a shorter life span than indirect or laboratory resins. Direct placement resins stain easily and wear over a relatively short period of time when compared to laboratory resins. Crowns, inlays, veneers bonded to metal substructures, and metal-free bridges are prepared indirectly on dies from composites processed in the laboratory (see Table 4-2) using various combinations of light, heat, pressure, and vacuum, which increase the polymerization and the wear resistance.

Question 4

Which type of direct composite has a wear rate most similar to dental amalgam?

Accepted Answer

A)  Packable composite 
B)  Flowable composite 
C)  Microfilled composite 
D)  Microhybrid composite 
A)  Packable composite 
B)  Flowable composite 
C)  Microfilled composite 
D)  Microhybrid composite

Question 5

Which of the following statements is true of polymerization shrinkage of composite restorative materials?

Accepted Answer

A)  Microfilled composites shrink less than microhybrid composites, because microhybrid composites have less resin. 
B)  Stresses from polymerization shrinkage cannot exceed the bond strength of a composite to tooth structure. 
C)  Incremental addition and polymerization of composite in layers will reduce the effective shrinkage. 
D)  Bulk addition of composite will reduce the effective shrinkage. 
A)  Microfilled composites shrink less than microhybrid composites, because microhybrid composites have less resin. 
B)  Stresses from polymerization shrinkage cannot exceed the bond strength of a composite to tooth structure. 
C)  Incremental addition and polymerization of composite in layers will reduce the effective shrinkage. 
D)  Bulk addition of composite will reduce the effective shrinkage.

Question 6

In a visible, light-curing, direct composite system, which component is the light absorbed by?

Accepted Answer

A)  Diketone, which starts the polymerization reaction in the presence of an organic peroxide initiator 
B)  Diketone, which starts the polymerization reaction in the presence of an organic amine 
C)  Organic peroxide initiator and organic amine accelerator 
D)  Organic peroxide initiator alone 
A)  Diketone, which starts the polymerization reaction in the presence of an organic peroxide initiator 
B)  Diketone, which starts the polymerization reaction in the presence of an organic amine 
C)  Organic peroxide initiator and organic amine accelerator 
D)  Organic peroxide initiator alone

Question 7

Which of the following direct esthetic restorative materials releases the least fluoride?

Accepted Answer

A)  Hybrid ionomer 
B)  Glass ionomer 
C)  Compomer 
D)  Composite 
A)  Hybrid ionomer 
B)  Glass ionomer 
C)  Compomer 
D)  Composite

Question 8

Sensitivity associated with placement of composite restorations has been reported in about ____% of cases.

Accepted Answer

A)  1 
B)  10 
C)  25 
D)  50 
E)  75 
A)  1 
B)  10 
C)  25 
D)  50 
E)  75

Question 9

Which of the following statements is true when contrasting composite core material with amalgam?

Accepted Answer

A)  Composite can be finished immediately and prepared for a crown at the same appointment, whereas amalgam cannot be prepared for a crown at the same appointment. 
B)  Composite materials have good color under ceramic, but amalgam does not. 
C)  Composite materials are more difficult to contour than amalgam materials. 
D)  A, B, and C are correct. 
E)  A and B are correct. 
A)  Composite can be finished immediately and prepared for a crown at the same appointment, whereas amalgam cannot be prepared for a crown at the same appointment. 
B)  Composite materials have good color under ceramic, but amalgam does not. 
C)  Composite materials are more difficult to contour than amalgam materials. 
D)  A, B, and C are correct. 
E)  A and B are correct.

Question 10

Which of the following organic fillers are radiolucent?

Accepted Answer

A)  Lithium aluminum silicate 
B)  Crystalline silica 
C)  Strontium 
D)  A and B are correct. 
E)  B and C are correct. 
A)  Lithium aluminum silicate 
B)  Crystalline silica 
C)  Strontium 
D)  A and B are correct. 
E)  B and C are correct.

Question 11

Glass ionomers are typically reserved for which type of restoration?

Accepted Answer

A)  Posterior interproximal lesions 
B)  Anterior interproximal lesions 
C)  Cervically eroded areas 
D)  Pit and fissure lesions 
A)  Posterior interproximal lesions 
B)  Anterior interproximal lesions 
C)  Cervically eroded areas 
D)  Pit and fissure lesions

Question 12

It is recommended that glass ionomer restorations be used in Class _____ restorations where esthetics is not critical.

Accepted Answer

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

Question 13

What are the components of the smear layer?

Accepted Answer

A)  Hydroxyapatite and partially denatured collagen 
B)  Calcium hydroxide 
C)  Adhesive 
D)  Etchant 
E)  Primer 
A)  Hydroxyapatite and partially denatured collagen 
B)  Calcium hydroxide 
C)  Adhesive 
D)  Etchant 
E)  Primer

Question 14

The more resin matrix, the _________ the linear coefficient of thermal expansion, because the polymer has a _________ value than the filler.

Accepted Answer

A)  higher; higher 
B)  higher; lower 
C)  lower; higher 
D)  lower; lower 
A)  higher; higher 
B)  higher; lower 
C)  lower; higher 
D)  lower; lower

Question 15

Which of the following is not a direct esthetic restorative material?

Accepted Answer

A)  Ceramic 
B)  Composite 
C)  Compomer 
D)  Glass ionomer 
A)  Ceramic 
B)  Composite 
C)  Compomer 
D)  Glass ionomer

Question 16

When composites are repaired, the repair bond strength is about ________% of the cohesive strength of the original composite.

Accepted Answer

A)  100 to 120 
B)  80 to 100 
C)  60 to 80 
D)  40 to 60 
E)  20 
A)  100 to 120 
B)  80 to 100 
C)  60 to 80 
D)  40 to 60 
E)  20

Question 17

Which of the following is not true about composite resin materials?

Accepted Answer

A)  High strength 
B)  Esthetically pleasing 
C)  High wear resistance 
D)  High fluoride content 
A)  High strength 
B)  Esthetically pleasing 
C)  High wear resistance 
D)  High fluoride content

Question 18

Advantages of composite provisional materials over acrylic provisional materials include

Accepted Answer

A)  lower cost. 
B)  harder, more brittle texture. 
C)  doughy stage for easier handling. 
D)  lower heat release during curing. 
A)  lower cost. 
B)  harder, more brittle texture. 
C)  doughy stage for easier handling. 
D)  lower heat release during curing.

Question 19

Currently acceptable composites for posterior applications require clinical studies demonstrating a loss of surface contour less than _____ µm over a 5-year period.

Accepted Answer

A)  5 
B)  50 
C)  100 
D)  250 
E)  5000 
A)  5 
B)  50 
C)  100 
D)  250 
E)  5000

Question 20

Which of the following have the highest rates of thermal expansion?

Accepted Answer

A)  Nanofilled composites 
B)  Microfilled composites 
C)  Macrofilled composites 
D)  Microhybrid composites 
A)  Nanofilled composites 
B)  Microfilled composites 
C)  Macrofilled composites 
D)  Microhybrid composites

Which of the following is the most popular direct esthetic dental restorative material?

How can postoperative sensitivity be avoided?

Compare and contrast direct placement resins to laboratory resins.

Which type of direct composite has a wear rate most similar to dental amalgam?

Which of the following statements is true of polymerization shrinkage of composite restorative materials?

In a visible, light-curing, direct composite system, which component is the light absorbed by?

Which of the following direct esthetic restorative materials releases the least fluoride?

Sensitivity associated with placement of composite restorations has been reported in about ____% of cases.

Which of the following statements is true when contrasting composite core material with amalgam?

Which of the following organic fillers are radiolucent?

Glass ionomers are typically reserved for which type of restoration?

It is recommended that glass ionomer restorations be used in Class _____ restorations where esthetics is not critical.

What are the components of the smear layer?

The more resin matrix, the _ the linear coefficient of thermal expansion, because the polymer has a _ value than the filler.

Which of the following is not a direct esthetic restorative material?

When composites are repaired, the repair bond strength is about ________% of the cohesive strength of the original composite.

Which of the following is not true about composite resin materials?

Advantages of composite provisional materials over acrylic provisional materials include

Currently acceptable composites for posterior applications require clinical studies demonstrating a loss of surface contour less than _____ µm over a 5-year period.

Which of the following have the highest rates of thermal expansion?

Introduction to Restorative Dental Materials

Properties of Materials

Preventive Dental Materials

Dental Amalgam

Finishing, Polishing, and Cleansing Materials

Cements

Impression Materials

Model and Die Materials

Waxes

Casting Alloys, Wrought Alloys, and Solders

Casting, Soldering, and Welding

Polymers in Prosthodontics

Dental Ceramics

Dental Implants

Filters

Exam 4: Direct Esthetic Restorative Materials

Which of the following is the most popular direct esthetic dental restorative material?

How can postoperative sensitivity be avoided?

Compare and contrast direct placement resins to laboratory resins.

Which type of direct composite has a wear rate most similar to dental amalgam?

Which of the following statements is true of polymerization shrinkage of composite restorative materials?

In a visible, light-curing, direct composite system, which component is the light absorbed by?

Which of the following direct esthetic restorative materials releases the least fluoride?

Sensitivity associated with placement of composite restorations has been reported in about ____% of cases.

Which of the following statements is true when contrasting composite core material with amalgam?

Which of the following organic fillers are radiolucent?

Glass ionomers are typically reserved for which type of restoration?

It is recommended that glass ionomer restorations be used in Class _____ restorations where esthetics is not critical.

What are the components of the smear layer?

The more resin matrix, the _________ the linear coefficient of thermal expansion, because the polymer has a _________ value than the filler.

Which of the following is not a direct esthetic restorative material?

When composites are repaired, the repair bond strength is about ________% of the cohesive strength of the original composite.

Which of the following is not true about composite resin materials?

Advantages of composite provisional materials over acrylic provisional materials include

Currently acceptable composites for posterior applications require clinical studies demonstrating a loss of surface contour less than _____ µm over a 5-year period.

Which of the following have the highest rates of thermal expansion?

Introduction to Restorative Dental Materials

Properties of Materials

Preventive Dental Materials

Dental Amalgam

Finishing, Polishing, and Cleansing Materials

Cements

Impression Materials

Model and Die Materials

Waxes

Casting Alloys, Wrought Alloys, and Solders

Casting, Soldering, and Welding

Polymers in Prosthodontics

Dental Ceramics

Dental Implants

Filters

The more resin matrix, the _ the linear coefficient of thermal expansion, because the polymer has a _ value than the filler.