Question 1

On which teeth are the greatest biting forces located?

Accepted Answer

A)  Molars 
B)  Canines 
C)  Incisors 
D)  Premolars 
A)  Molars 
B)  Canines 
C)  Incisors 
D)  Premolars

Question 2

For a given force, the _______ the area over which it is applied, the ________ the value of the stress.

Accepted Answer

A)  smaller; smaller 
B)  smaller; larger 
C)  larger; larger 
D)  A and C 
E)  B and C 
A)  smaller; smaller 
B)  smaller; larger 
C)  larger; larger 
D)  A and C 
E)  B and C

Question 3

Which of the following statements is true of the proportional limit?

Accepted Answer

A)  Below the proportional limit a material is plastic, and above the proportional limit it is elastic. 
B)  Below the proportional limit a material is elastic, and above the proportional limit it is plastic. 
C)  A material is elastic both below and above the proportional limit. 
D)  A material is plastic both below and above the proportional limit. 
A)  Below the proportional limit a material is plastic, and above the proportional limit it is elastic. 
B)  Below the proportional limit a material is elastic, and above the proportional limit it is plastic. 
C)  A material is elastic both below and above the proportional limit. 
D)  A material is plastic both below and above the proportional limit.

Question 4

For which of the following materials do dimensional changes occur during setting as a result of a chemical reaction?

Accepted Answer

A)  Elastomeric impression materials 
B)  Gold restorations 
C)  Wax patterns 
D)  A and C 
E)  B and C 
A)  Elastomeric impression materials 
B)  Gold restorations 
C)  Wax patterns 
D)  A and C 
E)  B and C

Question 5

Analysis of the strain-time curve indicates that the ________ the time and the _____ force applied to the impression material, the lower the permanent strain and the more accurate the impression.

Accepted Answer

A)  shorter; less 
B)  longer; less 
C)  shorter; more 
D)  longer; more 
A)  shorter; less 
B)  longer; less 
C)  shorter; more 
D)  longer; more

Question 6

Dimensional change may occur during setting as a result of which factor?

Accepted Answer

A)  Volumetric change 
B)  Chemical reaction 
C)  Cooling 
D)  All of the above 
E)  B and C are correct. 
A)  Volumetric change 
B)  Chemical reaction 
C)  Cooling 
D)  All of the above 
E)  B and C are correct.

Question 7

Which of the following statements is true of the tensile and compressive strengths of a material?

Accepted Answer

A)  They may be significantly different. 
B)  Brittle materials are stronger in tension than in compression. 
C)  Brittle materials have small differences in tensile and compressive strength. 
D)  A, B, and C are true. 
E)  A and C are true. 
A)  They may be significantly different. 
B)  Brittle materials are stronger in tension than in compression. 
C)  Brittle materials have small differences in tensile and compressive strength. 
D)  A, B, and C are true. 
E)  A and C are true.

Question 8

What refers to the uptake of liquid by a bulk solid?

Accepted Answer

A)  Absorption 
B)  Adsorption 
C)  Hydrophilic 
D)  Hydrophobic 
A)  Absorption 
B)  Adsorption 
C)  Hydrophilic 
D)  Hydrophobic

Question 9

Of the following materials, which has the closest coefficient of expansion to tooth structure?

Accepted Answer

A)  Ceramic 
B)  Amalgam 
C)  Filled polymers 
D)  Composite resins 
A)  Ceramic 
B)  Amalgam 
C)  Filled polymers 
D)  Composite resins

Question 10

Which of the following is not a form of stress?

Accepted Answer

A)  Compressive 
B)  Flexure 
C)  Strain 
D)  Shear 
A)  Compressive 
B)  Flexure 
C)  Strain 
D)  Shear

Question 11

Patients with dentures can apply about ____% of the force of those with normal dentition.

Accepted Answer

A)  10 
B)  19 
C)  50 
D)  90 
E)  150 
A)  10 
B)  19 
C)  50 
D)  90 
E)  150

Question 12

Which of the following dental materials has a thermal conductivity that is most similar to tooth structure?

Accepted Answer

A)  Composites 
B)  Gold alloys 
C)  Dental amalgam 
D)  Zinc phosphate cement 
E)  Zinc oxide-eugenol cement 
A)  Composites 
B)  Gold alloys 
C)  Dental amalgam 
D)  Zinc phosphate cement 
E)  Zinc oxide-eugenol cement

Question 13

Which of the following choices encourage good wetting?

Accepted Answer

A)  Low-energy solid 
B)  High-energy solid 
C)  High-energy liquid 
D)  A and C are correct. 
E)  B and C are correct. 
A)  Low-energy solid 
B)  High-energy solid 
C)  High-energy liquid 
D)  A and C are correct. 
E)  B and C are correct.

Question 14

Which of the following dental restorative materials has the greatest thermal conductivity?

Accepted Answer

A)  Resin composites 
B)  Unfilled acrylics 
C)  Dental amalgam 
D)  Gold alloys 
E)  Ceramic 
A)  Resin composites 
B)  Unfilled acrylics 
C)  Dental amalgam 
D)  Gold alloys 
E)  Ceramic

Question 15

The volumetric dimensional change is equal to _____ times the linear dimensional change.

Accepted Answer

A)  two 
B)  three 
C)  four 
D)  six 
A)  two 
B)  three 
C)  four 
D)  six

Question 16

What causes corrosion?

Accepted Answer

A)  Contact of two dissimilar metals in the mouth 
B)  Poor oral hygiene around restorations 
C)  Acidic food and drink 
D)  A and C are correct. 
A)  Contact of two dissimilar metals in the mouth 
B)  Poor oral hygiene around restorations 
C)  Acidic food and drink 
D)  A and C are correct.

Question 17

Percolation is thought to decrease with time following insertion of which of the following dental restorative materials?

Accepted Answer

A)  Filled resin composite 
B)  Unfilled acrylic resin 
C)  Dental amalgam 
D)  Cast gold 
E)  Ceramic 
A)  Filled resin composite 
B)  Unfilled acrylic resin 
C)  Dental amalgam 
D)  Cast gold 
E)  Ceramic

Question 18

Compare and contrast the processes of tarnish and corrosion.

Accepted Answer

Corrosion is the dissolution of metals i

Question 19

Which term refers to the change in the length or deformation of a material when subjected to force?

Accepted Answer

A)  Flexure 
B)  Tensile 
C)  Strain 
D)  Shear 
A)  Flexure 
B)  Tensile 
C)  Strain 
D)  Shear

Question 20

Which of the following terms indicates concentration of molecules at the surface of a solid or liquid?

Accepted Answer

A)  Corrosion 
B)  Adsorption 
C)  Absorption 
D)  Hydrophilic 
A)  Corrosion 
B)  Adsorption 
C)  Absorption 
D)  Hydrophilic

On which teeth are the greatest biting forces located?

For a given force, the _ the area over which it is applied, the __ the value of the stress.

Which of the following statements is true of the proportional limit?

For which of the following materials do dimensional changes occur during setting as a result of a chemical reaction?

Analysis of the strain-time curve indicates that the ____ the time and the _ force applied to the impression material, the lower the permanent strain and the more accurate the impression.

Dimensional change may occur during setting as a result of which factor?

Which of the following statements is true of the tensile and compressive strengths of a material?

What refers to the uptake of liquid by a bulk solid?

Of the following materials, which has the closest coefficient of expansion to tooth structure?

Which of the following is not a form of stress?

Patients with dentures can apply about ____% of the force of those with normal dentition.

Which of the following dental materials has a thermal conductivity that is most similar to tooth structure?

Which of the following choices encourage good wetting?

Which of the following dental restorative materials has the greatest thermal conductivity?

The volumetric dimensional change is equal to _____ times the linear dimensional change.

What causes corrosion?

Percolation is thought to decrease with time following insertion of which of the following dental restorative materials?

Compare and contrast the processes of tarnish and corrosion.

Which term refers to the change in the length or deformation of a material when subjected to force?

Which of the following terms indicates concentration of molecules at the surface of a solid or liquid?

Introduction to Restorative Dental Materials

Preventive Dental Materials

Direct Esthetic Restorative 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 2: Properties of Materials

On which teeth are the greatest biting forces located?

For a given force, the _______ the area over which it is applied, the ________ the value of the stress.

Which of the following statements is true of the proportional limit?

For which of the following materials do dimensional changes occur during setting as a result of a chemical reaction?

Analysis of the strain-time curve indicates that the ________ the time and the _____ force applied to the impression material, the lower the permanent strain and the more accurate the impression.

Dimensional change may occur during setting as a result of which factor?

Which of the following statements is true of the tensile and compressive strengths of a material?

What refers to the uptake of liquid by a bulk solid?

Of the following materials, which has the closest coefficient of expansion to tooth structure?

Which of the following is not a form of stress?

Patients with dentures can apply about ____% of the force of those with normal dentition.

Which of the following dental materials has a thermal conductivity that is most similar to tooth structure?

Which of the following choices encourage good wetting?

Which of the following dental restorative materials has the greatest thermal conductivity?

The volumetric dimensional change is equal to _____ times the linear dimensional change.

What causes corrosion?

Percolation is thought to decrease with time following insertion of which of the following dental restorative materials?

Compare and contrast the processes of tarnish and corrosion.

Which term refers to the change in the length or deformation of a material when subjected to force?

Which of the following terms indicates concentration of molecules at the surface of a solid or liquid?

Introduction to Restorative Dental Materials

Preventive Dental Materials

Direct Esthetic Restorative 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

For a given force, the _ the area over which it is applied, the __ the value of the stress.

Analysis of the strain-time curve indicates that the ____ the time and the _ force applied to the impression material, the lower the permanent strain and the more accurate the impression.