Question 1

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)  Bulk addition of composite will reduce the effective shrinkage. 
D)  Incremental addition and polymerization of composite in layers 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)  Bulk addition of composite will reduce the effective shrinkage. 
D)  Incremental addition and polymerization of composite in layers will reduce the effective shrinkage.

Question 2

Which of the following statements is true of silane in composite materials?

Accepted Answer

A)  Silane forms the dispersed organic filler particles. 
B)  Silane forms the dispersed inorganic filler particles. 
C)  Silane is a coupling agent on the filler particles. 
D)  Silane forms the resin matrix. 
A)  Silane forms the dispersed organic filler particles. 
B)  Silane forms the dispersed inorganic filler particles. 
C)  Silane is a coupling agent on the filler particles. 
D)  Silane forms the resin matrix.

Question 3

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 4

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

Accepted Answer

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

Question 5

The elastic modulus of composite materials for posterior restorations is dominated by:

Accepted Answer

A)  stiffness of the filler. 
B)  low filler content. 
C)  high filler content. 
D)  percentage of matrix. 
A)  stiffness of the filler. 
B)  low filler content. 
C)  high filler content. 
D)  percentage of matrix.

Question 6

Which of the following statements is true of flowable composites when contrasted with microhybrid composites? Flowable composites:

Accepted Answer

A)  have a higher filler content than microhybrid composites. 
B)  exhibit lower polymerization shrinkage than microhybrid composites. 
C)  have higher wear resistance than microhybrid composites. 
D)  have lower viscosity than microhybrid composites. 
A)  have a higher filler content than microhybrid composites. 
B)  exhibit lower polymerization shrinkage than microhybrid composites. 
C)  have higher wear resistance than microhybrid composites. 
D)  have lower viscosity than microhybrid composites.

Question 7

When microhybrid composites are contrasted with microfilled composites:

Accepted Answer

A)  microhybrid composites have more polymerization shrinkage. 
B)  microfilled composites have a higher linear coefficient of thermal expansion. 
C)  microhybrid composites have higher water sorption. 
D)  microfilled composites have higher compressive strength. 
E)  microhybrid composites have a lower elastic modulus in compression. 
A)  microhybrid composites have more polymerization shrinkage. 
B)  microfilled composites have a higher linear coefficient of thermal expansion. 
C)  microhybrid composites have higher water sorption. 
D)  microfilled composites have higher compressive strength. 
E)  microhybrid composites have a lower elastic modulus in compression.

Question 8

Organic fillers that are radiolucent include:

Accepted Answer

A)  crystalline silica. 
B)  lithium aluminum silicate. 
C)  strontium. 
D)  all of the above. 
E)  only A and B. 
A)  crystalline silica. 
B)  lithium aluminum silicate. 
C)  strontium. 
D)  all of the above. 
E)  only A and B.

Question 9

The most likely cause(s)of sensitivity following placement of composite restorations is(are):

Accepted Answer

A)  an occlusal interference. 
B)  the use of acid etchant during placement. 
C)  induced internal stress. 
D)  microleakage of bacteria. 
E)  both C and D. 
A)  an occlusal interference. 
B)  the use of acid etchant during placement. 
C)  induced internal stress. 
D)  microleakage of bacteria. 
E)  both C and D.

Question 10

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 11

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

Accepted Answer

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

Question 12

Compomers are recommended for patients with _____ risk.

Accepted Answer

A)  low caries 
B)  medium caries 
C)  high caries 
D)  any level of 
A)  low caries 
B)  medium caries 
C)  high caries 
D)  any level of

Question 13

A bond strength of _____ MPa is an estimated requirement to prevent marginal gaps as a result of polymerization shrinkage during placement of composite restorations.

Accepted Answer

A)  0.01 
B)  1 
C)  10 
D)  20 
A)  0.01 
B)  1 
C)  10 
D)  20

Question 14

The setting reaction of a composite restorative material is:

Accepted Answer

A)  gelation. 
B)  polymerization. 
C)  hysteresis. 
D)  reduction. 
A)  gelation. 
B)  polymerization. 
C)  hysteresis. 
D)  reduction.

Question 15

Which of the following statements is true of single- and two-paste composites?

Accepted Answer

A)  Compules are a component of two-paste composites. 
B)  Single-paste composites are light activated. 
C)  An automix syringe is a component of single-paste composites. 
D)  Single-paste composites may be dual cured. 
A)  Compules are a component of two-paste composites. 
B)  Single-paste composites are light activated. 
C)  An automix syringe is a component of single-paste composites. 
D)  Single-paste composites may be dual cured.

Question 16

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

Accepted Answer

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

Question 17

Advantages of placing composite into the plastic tip of a syringe and injecting it into the cavity preparation include that the syringe:

Accepted Answer

A)  allows the use of small mixes. 
B)  reduces incorporation of voids into the composite during insertion. 
C)  facilitates placement of the material in the areas of retention. 
D)  A, B, and C. 
E)  A and C. 
A)  allows the use of small mixes. 
B)  reduces incorporation of voids into the composite during insertion. 
C)  facilitates placement of the material in the areas of retention. 
D)  A, B, and C. 
E)  A and C.

Question 18

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

Accepted Answer

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

Question 19

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 easier to contour than amalgam materials. 
D)  A, B, and C are correct. 
E)  A and C 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 easier to contour than amalgam materials. 
D)  A, B, and C are correct. 
E)  A and C are correct.

Question 20

In the event that an esthetic material is required for a direct,posterior,load-bearing restoration,______ composite is the material of choice.

Accepted Answer

A)  packable 
B)  flowable 
C)  laboratory 
D)  core 
A)  packable 
B)  flowable 
C)  laboratory 
D)  core

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

Which of the following statements is true of silane in composite materials?

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

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

The elastic modulus of composite materials for posterior restorations is dominated by:

Which of the following statements is true of flowable composites when contrasted with microhybrid composites? Flowable composites:

When microhybrid composites are contrasted with microfilled composites:

Organic fillers that are radiolucent include:

The most likely cause(s)of sensitivity following placement of composite restorations is(are):

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

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

Compomers are recommended for patients with _____ risk.

A bond strength of _____ MPa is an estimated requirement to prevent marginal gaps as a result of polymerization shrinkage during placement of composite restorations.

The setting reaction of a composite restorative material is:

Which of the following statements is true of single- and two-paste composites?

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

Advantages of placing composite into the plastic tip of a syringe and injecting it into the cavity preparation include that the syringe:

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

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

In the event that an esthetic material is required for a direct,posterior,load-bearing restoration,______ composite is the material of choice.

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 and Soldering

Polymers in Prosthodontics

Dental Ceramics

Dental Implants

Filters

Exam 4: Direct Esthetic Restorative Materials

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

Which of the following statements is true of silane in composite materials?

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

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

The elastic modulus of composite materials for posterior restorations is dominated by:

Which of the following statements is true of flowable composites when contrasted with microhybrid composites? Flowable composites:

When microhybrid composites are contrasted with microfilled composites:

Organic fillers that are radiolucent include:

The most likely cause(s)of sensitivity following placement of composite restorations is(are):

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

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

Compomers are recommended for patients with _____ risk.

A bond strength of _____ MPa is an estimated requirement to prevent marginal gaps as a result of polymerization shrinkage during placement of composite restorations.

The setting reaction of a composite restorative material is:

Which of the following statements is true of single- and two-paste composites?

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

Advantages of placing composite into the plastic tip of a syringe and injecting it into the cavity preparation include that the syringe:

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

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

In the event that an esthetic material is required for a direct,posterior,load-bearing restoration,______ composite is the material of choice.

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 and Soldering

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.