Question 1

Given a schematic sketch of two opposing teeth, one with a temporary aluminum alloy crown and the other with a gold crown, which one would be the electrolyte?

Accepted Answer

A)  Saliva 
B)  Gold crown 
C)  Difference in electrical potential 
D)  Temporary aluminum alloy crown 
A)  Saliva 
B)  Gold crown 
C)  Difference in electrical potential 
D)  Temporary aluminum alloy crown

Question 2

What is used as a measurement of heat transfer?

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 3

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

Accepted Answer

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

Question 4

Which of the following statements is true of the measure of Knoop hardness?

Accepted Answer

A)  It is obtained by measurement of the short diagonal of an indentation from a diamond indenter. 
B)  Enamel has a lower Knoop hardness value than dentin and cementum. 
C)  Hardness is directly related to yield strength and wear resistance. 
D)  The larger the indentation, the smaller the value. 
A)  It is obtained by measurement of the short diagonal of an indentation from a diamond indenter. 
B)  Enamel has a lower Knoop hardness value than dentin and cementum. 
C)  Hardness is directly related to yield strength and wear resistance. 
D)  The larger the indentation, the smaller the value.

Question 5

Expansion and contraction rates between dental materials and tooth structure caused by temperature change vary. Gaps at the margins allow fluids to enter the space. What is this known as?

Accepted Answer

A)  Coefficient of thermal expansion 
B)  Thermal conductivity 
C)  Dimensional change 
D)  Percolation 
A)  Coefficient of thermal expansion 
B)  Thermal conductivity 
C)  Dimensional change 
D)  Percolation

Question 6

Which of the following is an electrical property of interest in the mouth?

Accepted Answer

A)  Coefficient of thermal expansion 
B)  Elastic modulus 
C)  Percolation 
D)  Galvanism 
E)  Ductility 
A)  Coefficient of thermal expansion 
B)  Elastic modulus 
C)  Percolation 
D)  Galvanism 
E)  Ductility

Question 7

How is the hardness of a dental material reported?

Accepted Answer

A)  Knoop hardness 
B)  Nano-indentation 
C)  Diamond indenter 
D)  Dynamic properties 
A)  Knoop hardness 
B)  Nano-indentation 
C)  Diamond indenter 
D)  Dynamic properties

Given a schematic sketch of two opposing teeth, one with a temporary aluminum alloy crown and the other with a gold crown, which one would be the electrolyte?

What is used as a measurement of heat transfer?

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

Which of the following statements is true of the measure of Knoop hardness?

Expansion and contraction rates between dental materials and tooth structure caused by temperature change vary. Gaps at the margins allow fluids to enter the space. What is this known as?

Which of the following is an electrical property of interest in the mouth?

How is the hardness of a dental material reported?

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

Given a schematic sketch of two opposing teeth, one with a temporary aluminum alloy crown and the other with a gold crown, which one would be the electrolyte?

What is used as a measurement of heat transfer?

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

Which of the following statements is true of the measure of Knoop hardness?

Expansion and contraction rates between dental materials and tooth structure caused by temperature change vary. Gaps at the margins allow fluids to enter the space. What is this known as?

Which of the following is an electrical property of interest in the mouth?

How is the hardness of a dental material reported?

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