Question 1

Which of the following dental restorative materials is particularly susceptible to corrosion?

Accepted Answer

A)  Acrylic 
B)  Dental porcelain 
C)  Dental amalgam 
D)  Composite resin 
A)  Acrylic 
B)  Dental porcelain 
C)  Dental amalgam 
D)  Composite resin C

Question 2

Which of the following statements is true for the property of wetting as related to dental materials?

Accepted Answer

A)  The Teflon surface of cooking equipment has good wetting. 
B)  A thin film of dental cement is desirable to cement crowns. 
C)  Liquids generally spread better over low surface energy surfaces. 
D)  A surface has high surface energy when liquids bead up on the surface. 
A)  The Teflon surface of cooking equipment has good wetting. 
B)  A thin film of dental cement is desirable to cement crowns. 
C)  Liquids generally spread better over low surface energy surfaces. 
D)  A surface has high surface energy when liquids bead up on the surface. B

Question 3

Some dental materials may be therapeutic in small quantities or if in contact with tissues for a short period of time.Dental materials may be irritating or toxic with longer or larger doses.

Accepted Answer

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

Question 4

The staining of resins and acrylics from repeated exposure to coffee,tea,and other dyed beverages is due to:

Accepted Answer

A)  compressive forces. 
B)  water sorption. 
C)  galvanism. 
D)  tarnish. 
A)  compressive forces. 
B)  water sorption. 
C)  galvanism. 
D)  tarnish.

Question 5

Of the three types of forces,which is most concerned with the stretching of a material?

Accepted Answer

A)  Tensile force 
B)  Compressive force 
C)  Shearing force 
A)  Tensile force 
B)  Compressive force 
C)  Shearing force

Question 6

Which of the following is considered to be the most reliable means of clinical assessment of composite and glass ionomer restorations?

Accepted Answer

A)  The patient history 
B)  Evaluation of radiographs 
C)  Use of the air-water syringe 
D)  Tactile evaluation of the tooth surface 
A)  The patient history 
B)  Evaluation of radiographs 
C)  Use of the air-water syringe 
D)  Tactile evaluation of the tooth surface

Question 7

Some materials give off heat when mixed.What is this called?

Accepted Answer

A)  Chemical reaction 
B)  Exothermic reaction 
C)  Thermal conductivity 
D)  Coefficient of thermal expansion 
A)  Chemical reaction 
B)  Exothermic reaction 
C)  Thermal conductivity 
D)  Coefficient of thermal expansion

Question 8

The normal resting pH of saliva ranges from 6.2 to _____,which is neutral.

Accepted Answer

A)  1 
B)  6.6 
C)  7 
D)  14 
A)  1 
B)  6.6 
C)  7 
D)  14

Question 9

What is percolation?

Accepted Answer

A)  The rate at which heat flows through a material 
B)  A form of chemical rather than mechanical retention 
C)  Something that helps seal the interface between tooth and restorative material 
D)  Something that allows the ingress of bacteria and oral fluids and may lead to recurrent caries,staining,and pulpal irritation 
A)  The rate at which heat flows through a material 
B)  A form of chemical rather than mechanical retention 
C)  Something that helps seal the interface between tooth and restorative material 
D)  Something that allows the ingress of bacteria and oral fluids and may lead to recurrent caries,staining,and pulpal irritation

Question 10

Why is the coefficient of thermal expansion significant in dental materials?

Accepted Answer

A)  It measures the change in volume and length of a restoration. 
B)  It measures the amount of percolation of the restoration interface. 
C)  It measures the change in oral temperature related to foods ingested. 
D)  It measures the amount of stress and strain placed on the restoration. 
A)  It measures the change in volume and length of a restoration. 
B)  It measures the amount of percolation of the restoration interface. 
C)  It measures the change in oral temperature related to foods ingested. 
D)  It measures the amount of stress and strain placed on the restoration.

Question 11

Match the items with the correct description below.
-Corrosion

Accepted Answer

A) Electrical current between two dissimilar metals 
B) Discoloration due to oxidation of the metal's surface 
C) Deterioration of the metal due to moisture and acid present in the oral 
D) The rate at which heat flows through a material 
E) Opening and closing of a gap between the restoration and the tooth surface 
A) Electrical current between two dissimilar metals 
B) Discoloration due to oxidation of the metal's surface 
C) Deterioration of the metal due to moisture and acid present in the oral 
D) The rate at which heat flows through a material 
E) Opening and closing of a gap between the restoration and the tooth surface

Question 12

Match the items with the correct description below.
-Galvanism environment

Accepted Answer

A) Electrical current between two dissimilar metals 
B) Discoloration due to oxidation of the metal's surface 
C) Deterioration of the metal due to moisture and acid present in the oral 
D) The rate at which heat flows through a material 
E) Opening and closing of a gap between the restoration and the tooth surface 
A) Electrical current between two dissimilar metals 
B) Discoloration due to oxidation of the metal's surface 
C) Deterioration of the metal due to moisture and acid present in the oral 
D) The rate at which heat flows through a material 
E) Opening and closing of a gap between the restoration and the tooth surface

Question 13

Which of the following statements is correct about fatigue failure?

Accepted Answer

A)  It is not a factor for restorative dental materials. 
B)  It is not dependent on conditions in the oral cavity. 
C)  It occurs as the result of a large,single-force application. 
D)  It occurs as the result of microscopic flaws that grow over time. 
A)  It is not a factor for restorative dental materials. 
B)  It is not dependent on conditions in the oral cavity. 
C)  It occurs as the result of a large,single-force application. 
D)  It occurs as the result of microscopic flaws that grow over time.

Question 14

Which of the following materials has the highest ultimate compressive strength (lbs/in²)?

Accepted Answer

A)  Acrylic 
B)  Porcelain 
C)  Amalgam 
D)  Composite resins 
A)  Acrylic 
B)  Porcelain 
C)  Amalgam 
D)  Composite resins

Question 15

Torque is a combination of which forces?

Accepted Answer

A)  Compressive and tensile 
B)  Compressive and torsion 
C)  Shearing and tensile 
D)  Shearing and compressive 
A)  Compressive and tensile 
B)  Compressive and torsion 
C)  Shearing and tensile 
D)  Shearing and compressive

Question 16

Which of the following restorative materials has a coefficient of thermal expansion and thermal conductivity closest to enamel?

Accepted Answer

A)  Gold 
B)  Amalgam 
C)  Porcelain 
D)  Composite resin 
A)  Gold 
B)  Amalgam 
C)  Porcelain 
D)  Composite resin

Question 17

Match the items with the correct description below.
-Percolation

Accepted Answer

A) Electrical current between two dissimilar metals 
B) Discoloration due to oxidation of the metal's surface 
C) Deterioration of the metal due to moisture and acid present in the oral 
D) The rate at which heat flows through a material 
E) Opening and closing of a gap between the restoration and the tooth surface 
A) Electrical current between two dissimilar metals 
B) Discoloration due to oxidation of the metal's surface 
C) Deterioration of the metal due to moisture and acid present in the oral 
D) The rate at which heat flows through a material 
E) Opening and closing of a gap between the restoration and the tooth surface

Question 18

Which of the following is the best thermal conductor?

Accepted Answer

A)  Gold 
B)  Dentin 
C)  Enamel 
D)  Ceramic 
A)  Gold 
B)  Dentin 
C)  Enamel 
D)  Ceramic

Question 19

The color range of a tooth is usually seen by the human eye as yellow or brown.What is this component classified as?

Accepted Answer

A)  Hue 
B)  Value 
C)  Chroma 
A)  Hue 
B)  Value 
C)  Chroma

Question 20

List and describe the three basic types of force.

Accepted Answer

•Compressive force.Force applied to comp

Which of the following dental restorative materials is particularly susceptible to corrosion?

Which of the following statements is true for the property of wetting as related to dental materials?

Some dental materials may be therapeutic in small quantities or if in contact with tissues for a short period of time.Dental materials may be irritating or toxic with longer or larger doses.

The staining of resins and acrylics from repeated exposure to coffee,tea,and other dyed beverages is due to:

Of the three types of forces,which is most concerned with the stretching of a material?

Which of the following is considered to be the most reliable means of clinical assessment of composite and glass ionomer restorations?

Some materials give off heat when mixed.What is this called?

The normal resting pH of saliva ranges from 6.2 to _____,which is neutral.

What is percolation?

Why is the coefficient of thermal expansion significant in dental materials?

Match the items with the correct description below. -Corrosion

Match the items with the correct description below. -Galvanism environment

Which of the following statements is correct about fatigue failure?

Which of the following materials has the highest ultimate compressive strength (lbs/in²)?

Torque is a combination of which forces?

Which of the following restorative materials has a coefficient of thermal expansion and thermal conductivity closest to enamel?

Match the items with the correct description below. -Percolation

Which of the following is the best thermal conductor?

The color range of a tooth is usually seen by the human eye as yellow or brown.What is this component classified as?

List and describe the three basic types of force.

Introduction to Dental Materials

Physical and Mechanical Properties of Dental Materials

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 2: Oral Environment and Patient Considerations

Which of the following dental restorative materials is particularly susceptible to corrosion?

Which of the following statements is true for the property of wetting as related to dental materials?

Some dental materials may be therapeutic in small quantities or if in contact with tissues for a short period of time.Dental materials may be irritating or toxic with longer or larger doses.

The staining of resins and acrylics from repeated exposure to coffee,tea,and other dyed beverages is due to:

Of the three types of forces,which is most concerned with the stretching of a material?

Which of the following is considered to be the most reliable means of clinical assessment of composite and glass ionomer restorations?

Some materials give off heat when mixed.What is this called?

The normal resting pH of saliva ranges from 6.2 to _____,which is neutral.

What is percolation?

Why is the coefficient of thermal expansion significant in dental materials?

Match the items with the correct description below. -Corrosion

Match the items with the correct description below. -Galvanism environment

Which of the following statements is correct about fatigue failure?

Which of the following materials has the highest ultimate compressive strength (lbs/in²)?

Torque is a combination of which forces?

Which of the following restorative materials has a coefficient of thermal expansion and thermal conductivity closest to enamel?

Match the items with the correct description below. -Percolation

Which of the following is the best thermal conductor?

The color range of a tooth is usually seen by the human eye as yellow or brown.What is this component classified as?

List and describe the three basic types of force.

Introduction to Dental Materials

Physical and Mechanical Properties of Dental Materials

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