Question 1

Match the items with the correct description below.
-Stiffness

Accepted Answer

A) Resistance to deformation 
B) The greatest stress a structure can withstand without permanent deformation 
C) The resistance of a solid to penetration 
D) The maximum amount of stress a material can withstand without breaking 
E) The ability of a material to resist fracture 
A) Resistance to deformation 
B) The greatest stress a structure can withstand without permanent deformation 
C) The resistance of a solid to penetration 
D) The maximum amount of stress a material can withstand without breaking 
E) The ability of a material to resist fracture A

Question 2

Which of the following is an example of a direct restorative material?

Accepted Answer

A)  Porcelain inlay 
B)  Cast gold crown 
C)  Ceramic implant abutment 
D)  Silver dental amalgam restoration 
A)  Porcelain inlay 
B)  Cast gold crown 
C)  Ceramic implant abutment 
D)  Silver dental amalgam restoration D

Question 3

Metals that can withstand dimensional change without breaking are:

Accepted Answer

A)  tough. 
B)  ductile. 
C)  resilient. 
D)  malleable. 
A)  tough. 
B)  ductile. 
C)  resilient. 
D)  malleable. B

Question 4

Dental plaster begins with _____ components.

Accepted Answer

A)  water and powder 
B)  liquid and powder 
C)  paste and liquid 
D)  paste and paste 
A)  water and powder 
B)  liquid and powder 
C)  paste and liquid 
D)  paste and paste

Question 5

Match the items with the correct description below.
-Ultimate strength

Accepted Answer

A) Resistance to deformation 
B) The greatest stress a structure can withstand without permanent deformation 
C) The resistance of a solid to penetration 
D) The maximum amount of stress a material can withstand without breaking 
E) The ability of a material to resist fracture 
A) Resistance to deformation 
B) The greatest stress a structure can withstand without permanent deformation 
C) The resistance of a solid to penetration 
D) The maximum amount of stress a material can withstand without breaking 
E) The ability of a material to resist fracture

Question 6

The higher the viscosity,the greater is a liquid's ability to resist flow.Usually,the viscosity of liquids increases as the temperature increases.

Accepted Answer

A)  Both statements are true. 
B)  Both statements are false. 
C)  The first statement is true;the second statement is false. 
D)  The first statement is false;the second statement is true. 
A)  Both statements are true. 
B)  Both statements are false. 
C)  The first statement is true;the second statement is false. 
D)  The first statement is false;the second statement is true.

Question 7

Which of the following is the hardest material?

Accepted Answer

A)  Enamel of a tooth 
B)  Cementum of a tooth 
C)  Cast gold restorative material 
D)  Composite resin restorative material 
A)  Enamel of a tooth 
B)  Cementum of a tooth 
C)  Cast gold restorative material 
D)  Composite resin restorative material

Question 8

The stability of a solid is evaluated by noting:

Accepted Answer

A)  its atomic mass and number. 
B)  whether or not it is a compound. 
C)  how hard the material is when set. 
D)  whether the molecules are arranged uniformly. 
A)  its atomic mass and number. 
B)  whether or not it is a compound. 
C)  how hard the material is when set. 
D)  whether the molecules are arranged uniformly.

Question 9

If the molecules of a solid are arranged in a random form with no regular pattern,the solid is called:

Accepted Answer

A)  thixotropic. 
B)  amorphous. 
C)  malleable. 
D)  ductile. 
A)  thixotropic. 
B)  amorphous. 
C)  malleable. 
D)  ductile.

Question 10

List and describe the three different classifications of dental materials.

Accepted Answer

•Preventive materials: Directed toward p

Question 11

Match the items with the correct description below.
-Initial set time

Accepted Answer

A) Begins when the material can no longer be manipulated in the mouth 
B) When the material has reached its ultimate state 
C) The amount of time the auxiliary has to bring the components together into a homogenous mix 
D) The time permitted to manipulate the material within the mouth 
A) Begins when the material can no longer be manipulated in the mouth 
B) When the material has reached its ultimate state 
C) The amount of time the auxiliary has to bring the components together into a homogenous mix 
D) The time permitted to manipulate the material within the mouth

Question 12

Match the items with the correct description below.
-Mixing time

Accepted Answer

A) Begins when the material can no longer be manipulated in the mouth 
B) When the material has reached its ultimate state 
C) The amount of time the auxiliary has to bring the components together into a homogenous mix 
D) The time permitted to manipulate the material within the mouth 
A) Begins when the material can no longer be manipulated in the mouth 
B) When the material has reached its ultimate state 
C) The amount of time the auxiliary has to bring the components together into a homogenous mix 
D) The time permitted to manipulate the material within the mouth

Question 13

What is the measure of the weight of a material as compared with its volume?

Accepted Answer

A)  Density 
B)  Viscosity 
C)  Hardness 
D)  Resistance 
A)  Density 
B)  Viscosity 
C)  Hardness 
D)  Resistance

Question 14

What is the maximum amount of stress a material can take before breaking?

Accepted Answer

A)  Ultimate capacity 
B)  Ultimate strength 
C)  Material hardness 
D)  Maximum elasticity 
A)  Ultimate capacity 
B)  Ultimate strength 
C)  Material hardness 
D)  Maximum elasticity

Question 15

Match the items with the correct description below.
-Proportional limit

Accepted Answer

A) Resistance to deformation 
B) The greatest stress a structure can withstand without permanent deformation 
C) The resistance of a solid to penetration 
D) The maximum amount of stress a material can withstand without breaking 
E) The ability of a material to resist fracture 
A) Resistance to deformation 
B) The greatest stress a structure can withstand without permanent deformation 
C) The resistance of a solid to penetration 
D) The maximum amount of stress a material can withstand without breaking 
E) The ability of a material to resist fracture

Question 16

Of the following,which is not an application of a material's classification?

Accepted Answer

A)  Longevity 
B)  Utilization 
C)  Fabrication 
D)  All of these are correct. 
A)  Longevity 
B)  Utilization 
C)  Fabrication 
D)  All of these are correct.

Question 17

A _____ material will flow more easily under mechanical pressure.

Accepted Answer

A)  viscous 
B)  thixotropic 
C)  resistance 
D)  therapeutic 
A)  viscous 
B)  thixotropic 
C)  resistance 
D)  therapeutic

Question 18

Altering the set ratios of a material for any purpose will do what?

Accepted Answer

A)  Make the material harder 
B)  Produce adverse results 
C)  Speed up the initial set 
D)  Have little significance 
A)  Make the material harder 
B)  Produce adverse results 
C)  Speed up the initial set 
D)  Have little significance

Question 19

Which of the following statements is true concerning desirable properties of dental materials?

Accepted Answer

A)  The maximum amount of stress a material can withstand without breaking is known as the proportional limit. 
B)  Stiffer materials have a high modulus of elasticity. 
C)  Resilience is the ability of a material to resist fracture. 
D)  In most cases,metals tend to be brittle and ceramics tend to be ductile and malleable. 
A)  The maximum amount of stress a material can withstand without breaking is known as the proportional limit. 
B)  Stiffer materials have a high modulus of elasticity. 
C)  Resilience is the ability of a material to resist fracture. 
D)  In most cases,metals tend to be brittle and ceramics tend to be ductile and malleable.

Question 20

Which type of bond occurs when two atoms share electrons in their outer shell,creating full shells for both?

Accepted Answer

A)  Ionic bond 
B)  Covalent bond 
C)  Metallic bond 
D)  Hydrogen bond 
A)  Ionic bond 
B)  Covalent bond 
C)  Metallic bond 
D)  Hydrogen bond

Match the items with the correct description below. -Stiffness

Which of the following is an example of a direct restorative material?

Metals that can withstand dimensional change without breaking are:

Dental plaster begins with _____ components.

Match the items with the correct description below. -Ultimate strength

The higher the viscosity,the greater is a liquid's ability to resist flow.Usually,the viscosity of liquids increases as the temperature increases.

Which of the following is the hardest material?

The stability of a solid is evaluated by noting:

If the molecules of a solid are arranged in a random form with no regular pattern,the solid is called:

List and describe the three different classifications of dental materials.

Match the items with the correct description below. -Initial set time

Match the items with the correct description below. -Mixing time

What is the measure of the weight of a material as compared with its volume?

What is the maximum amount of stress a material can take before breaking?

Match the items with the correct description below. -Proportional limit

Of the following,which is not an application of a material's classification?

A _____ material will flow more easily under mechanical pressure.

Altering the set ratios of a material for any purpose will do what?

Which of the following statements is true concerning desirable properties of dental materials?

Which type of bond occurs when two atoms share electrons in their outer shell,creating full shells for both?

Introduction to Dental Materials

Oral Environment and Patient Considerations

General Handling and Safety of Dental Materials in the Dental Office

Principles of Bonding

Composites, glass Ionomers, and Compomers

Preventive and Desensitizing Materials

Teeth Whitening Materials and Procedures

Dental Ceramics

Dental Amalgam

Casting Metals, solders, and Wrought Metal Alloys

Dental Implants

Abrasion, finishing, and Polishing

Dental Cement

Impression Materials

Gypsum and Wax Products

Polymers for Prosthetic Dentistry

Provisional Restorations

Preventive and Corrective Oral Appliances

Filters

Exam 3: Physical and Mechanical Properties of Dental Materials

Match the items with the correct description below. -Stiffness

Which of the following is an example of a direct restorative material?

Metals that can withstand dimensional change without breaking are:

Dental plaster begins with _____ components.

Match the items with the correct description below. -Ultimate strength

The higher the viscosity,the greater is a liquid's ability to resist flow.Usually,the viscosity of liquids increases as the temperature increases.

Which of the following is the hardest material?

The stability of a solid is evaluated by noting:

If the molecules of a solid are arranged in a random form with no regular pattern,the solid is called:

List and describe the three different classifications of dental materials.

Match the items with the correct description below. -Initial set time

Match the items with the correct description below. -Mixing time

What is the measure of the weight of a material as compared with its volume?

What is the maximum amount of stress a material can take before breaking?

Match the items with the correct description below. -Proportional limit

Of the following,which is not an application of a material's classification?

A _____ material will flow more easily under mechanical pressure.

Altering the set ratios of a material for any purpose will do what?

Which of the following statements is true concerning desirable properties of dental materials?

Which type of bond occurs when two atoms share electrons in their outer shell,creating full shells for both?

Introduction to Dental Materials

Oral Environment and Patient Considerations

General Handling and Safety of Dental Materials in the Dental Office

Principles of Bonding

Composites, glass Ionomers, and Compomers

Preventive and Desensitizing Materials

Teeth Whitening Materials and Procedures

Dental Ceramics

Dental Amalgam

Casting Metals, solders, and Wrought Metal Alloys

Dental Implants

Abrasion, finishing, and Polishing

Dental Cement

Impression Materials

Gypsum and Wax Products

Polymers for Prosthetic Dentistry

Provisional Restorations

Preventive and Corrective Oral Appliances

Filters