Question 1

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

Accepted Answer

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

Question 2

Which of the following choices encourage good wetting?

Accepted Answer

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

Question 3

The ratio of the force to the area is called:

Accepted Answer

A)  stress. 
B)  strain. 
C)  elastic modulus. 
D)  tensile strength. 
A)  stress. 
B)  strain. 
C)  elastic modulus. 
D)  tensile strength.

Question 4

A new addition silicone impression material is tested for linear dimensional change upon setting.The result of -0.34% indicates that _____ took place within 24 hours after setting.

Accepted Answer

A)  linear expansion 
B)  linear shrinkage 
C)  thermal expansion 
D)  thermal shrinkage 
A)  linear expansion 
B)  linear shrinkage 
C)  thermal expansion 
D)  thermal shrinkage

Question 5

The thermal coefficient of expansion _____ uniform throughout the entire temperature range and is usually _____ for liquids than solids.

Accepted Answer

A)  is; lower 
B)  is; higher 
C)  is not; lower 
D)  is not; higher 
A)  is; lower 
B)  is; higher 
C)  is not; lower 
D)  is not; higher

Question 6

Detail the significance of thermal dimensional change.

Accepted Answer

Restorative dental materials are subject

Question 7

_____ 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 8

The energy required to fracture a material is a measure of its:

Accepted Answer

A)  resilience. 
B)  toughness. 
C)  ductility. 
D)  malleability. 
A)  resilience. 
B)  toughness. 
C)  ductility. 
D)  malleability.

Question 9

Which of the following restorative materials have thermal conductivity that is most similar to tooth structure?

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

_____ is used as a measure of heat transferred.

Accepted Answer

A)  Linear coefficient of thermal expansion 
B)  Thermal conductivity 
C)  Galvanism 
D)  Absorption 
E)  Adsorption 
A)  Linear coefficient of thermal expansion 
B)  Thermal conductivity 
C)  Galvanism 
D)  Absorption 
E)  Adsorption

Question 12

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 13

Which of the following dental restorative materials has a linear coefficient of thermal expansion closest to teeth?

Accepted Answer

A)  Glass ionomer base 
B)  Dental amalgam 
C)  Composites 
D)  Gold alloys 
E)  Unfilled acrylics and sealants 
A)  Glass ionomer base 
B)  Dental amalgam 
C)  Composites 
D)  Gold alloys 
E)  Unfilled acrylics and sealants

Question 14

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 15

Explain the difference between ductility and malleability.

Accepted Answer

The percents of elongation and compressi

Question 16

Which of the following restorative materials has a linear thermal coefficient of expansion that is smaller than that of human teeth?

Accepted Answer

A)  Dental amalgam 
B)  Ceramics 
C)  Composites 
D)  Unfilled acrylics and sealants 
A)  Dental amalgam 
B)  Ceramics 
C)  Composites 
D)  Unfilled acrylics and sealants

Question 17

Dimensional change may occur during setting as a result of:

Accepted Answer

A)  chemical reaction. 
B)  volumetric change. 
C)  cooling. 
D)  all of the above. 
E)  only A and C. 
A)  chemical reaction. 
B)  volumetric change. 
C)  cooling. 
D)  all of the above. 
E)  only A and C.

Question 18

Which of the following materials has the highest rating related to thermal conductivity?

Accepted Answer

A)  Enamel 
B)  Glass ionomer 
C)  Gold alloy 
D)  Dentin 
A)  Enamel 
B)  Glass ionomer 
C)  Gold alloy 
D)  Dentin

Question 19

With regard to wettability and water,a low contact angle indicates:

Accepted Answer

A)  the material is hydrophilic. 
B)  the material is hydrophobic. 
C)  the contact angle is greater than 90°. 
D)  both A and C. 
E)  both B and C. 
A)  the material is hydrophilic. 
B)  the material is hydrophobic. 
C)  the contact angle is greater than 90°. 
D)  both A and C. 
E)  both B and C.

Question 20

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

Accepted Answer

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

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

Which of the following choices encourage good wetting?

The ratio of the force to the area is called:

A new addition silicone impression material is tested for linear dimensional change upon setting.The result of -0.34% indicates that _____ took place within 24 hours after setting.

The thermal coefficient of expansion _ uniform throughout the entire temperature range and is usually _ for liquids than solids.

Detail the significance of thermal dimensional change.

_____ refers to the uptake of liquid by a bulk solid.

The energy required to fracture a material is a measure of its:

Which of the following restorative materials have thermal conductivity that is most similar to tooth structure?

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

_____ is used as a measure of heat transferred.

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

Which of the following dental restorative materials has a linear coefficient of thermal expansion closest to teeth?

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

Explain the difference between ductility and malleability.

Which of the following restorative materials has a linear thermal coefficient of expansion that is smaller than that of human teeth?

Dimensional change may occur during setting as a result of:

Which of the following materials has the highest rating related to thermal conductivity?

With regard to wettability and water,a low contact angle indicates:

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 and Soldering

Polymers in Prosthodontics

Dental Ceramics

Dental Implants

Filters

Exam 2: Properties of Materials

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

Which of the following choices encourage good wetting?

The ratio of the force to the area is called:

A new addition silicone impression material is tested for linear dimensional change upon setting.The result of -0.34% indicates that _____ took place within 24 hours after setting.

The thermal coefficient of expansion _____ uniform throughout the entire temperature range and is usually _____ for liquids than solids.

Detail the significance of thermal dimensional change.

_____ refers to the uptake of liquid by a bulk solid.

The energy required to fracture a material is a measure of its:

Which of the following restorative materials have thermal conductivity that is most similar to tooth structure?

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

_____ is used as a measure of heat transferred.

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

Which of the following dental restorative materials has a linear coefficient of thermal expansion closest to teeth?

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

Explain the difference between ductility and malleability.

Which of the following restorative materials has a linear thermal coefficient of expansion that is smaller than that of human teeth?

Dimensional change may occur during setting as a result of:

Which of the following materials has the highest rating related to thermal conductivity?

With regard to wettability and water,a low contact angle indicates:

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 and Soldering

Polymers in Prosthodontics

Dental Ceramics

Dental Implants

Filters

The thermal coefficient of expansion _ uniform throughout the entire temperature range and is usually _ for liquids than solids.