Question 1

When are solders used in dentistry?

Accepted Answer

A)  Clasp wire to a partial denture framework 
B)  Orthodontic wire to a band in full treatment 
C)  Bond two units of a fixed partial denture together after each is cast separately. 
D)  A, B, and C 
E)  A and C 
A)  Clasp wire to a partial denture framework 
B)  Orthodontic wire to a band in full treatment 
C)  Bond two units of a fixed partial denture together after each is cast separately. 
D)  A, B, and C 
E)  A and C

Question 2

According to the ADA classification for dental casting alloys, high-noble alloys must have a noble metal content of at least ____% by weight.

Accepted Answer

A)  20 
B)  40 
C)  60 
D)  80 
E)  90 
A)  20 
B)  40 
C)  60 
D)  80 
E)  90

Question 3

People are most likely to have an allergic reaction to which of the following base metals used in dentistry?

Accepted Answer

A)  Tin 
B)  Nickel 
C)  Copper 
D)  Titanium 
E)  Chromium 
A)  Tin 
B)  Nickel 
C)  Copper 
D)  Titanium 
E)  Chromium

Question 4

Biocompatibility of dental alloys is often based on _____ of the alloy.

Accepted Answer

A)  long-term contact 
B)  combined elements 
C)  amount of corrosion 
D)  amount of nickel used 
A)  long-term contact 
B)  combined elements 
C)  amount of corrosion 
D)  amount of nickel used

Question 5

What factors determine the definition of a noble metal?

Accepted Answer

A)  Inability to be used in an alloy 
B)  Indistinct melting point 
C)  Resistance to corrosion 
D)  Lack of malleability 
A)  Inability to be used in an alloy 
B)  Indistinct melting point 
C)  Resistance to corrosion 
D)  Lack of malleability

Question 6

Which of the following is not an organization that classifies and certifies alloys?

Accepted Answer

A)  American Dental Association 
B)  French Institute of Dental Materials 
C)  International Standards Organization 
D)  All of the above 
E)  Only A and C 
A)  American Dental Association 
B)  French Institute of Dental Materials 
C)  International Standards Organization 
D)  All of the above 
E)  Only A and C

Question 7

The color of oxides on metal varies from _________ on high-noble alloys and some noble alloys to _________ oxides on some base-metal alloys.

Accepted Answer

A)  dark gray; dark yellow 
B)  light yellow; light gray 
C)  light yellow; dark gray 
D)  dark gray; light yellow 
A)  dark gray; dark yellow 
B)  light yellow; light gray 
C)  light yellow; dark gray 
D)  dark gray; light yellow

Question 8

If an alloy contains 40 wt % gold, 20 wt % palladium, 10 wt % platinum, and 30 wt % copper, the nobility would be _____ wt %.

Accepted Answer

A)  10 
B)  20 
C)  30 
D)  40 
E)  75 
A)  10 
B)  20 
C)  30 
D)  40 
E)  75

Question 9

The ________ of an alloy is the mass in grams that occupies a volume of 1 cubic centimeter.

Accepted Answer

A)  area 
B)  density 
C)  thickness 
D)  circumference 
A)  area 
B)  density 
C)  thickness 
D)  circumference

Question 10

The correct order of firing to create sintered alloy composites is firing 1. of a ceramic that mediates ceramic-alloy bonding.
2) to create a spongy coping of high-noble metals.
3) of a lower fusing alloy that is absorbed by capillary action.

Accepted Answer

A)  1, 2, 3 
B)  2, 1, 3 
C)  3, 1, 2 
D)  1, 3, 2 
E)  2, 3, 1 
A)  1, 2, 3 
B)  2, 1, 3 
C)  3, 1, 2 
D)  1, 3, 2 
E)  2, 3, 1

Question 11

Which of the following statements is(are) true of the density of an alloy?

Accepted Answer

A)  The alloy with the highest density weighs the most. 
B)  High-density alloys are generally the most difficult to cast. 
C)  High-density alloys cost more than low-density alloys, because more mass is present in any given volume of restoration. 
D)  A, B, and C are true statements. 
E)  A and C are true statements. 
A)  The alloy with the highest density weighs the most. 
B)  High-density alloys are generally the most difficult to cast. 
C)  High-density alloys cost more than low-density alloys, because more mass is present in any given volume of restoration. 
D)  A, B, and C are true statements. 
E)  A and C are true statements.

Question 12

________ alloys are first cast but then shaped by mechanical force into their final forms.

Accepted Answer

A)  Wrought 
B)  Dental casting 
C)  Resin composite 
D)  Ceramic bonding 
A)  Wrought 
B)  Dental casting 
C)  Resin composite 
D)  Ceramic bonding

Question 13

Of all the alloys, which alloys are the most difficult to cast and polish?

Accepted Answer

A)  High-noble 
B)  Base-metal 
C)  Noble gold-based 
D)  Noble silver-based 
E)  Noble palladium-based 
A)  High-noble 
B)  Base-metal 
C)  Noble gold-based 
D)  Noble silver-based 
E)  Noble palladium-based

Question 14

Which of the following is correct about palladium?

Accepted Answer

A)  Is much harder than gold 
B)  Has poor corrosion resistance 
C)  Has a much lower melting point than gold 
D)  May be used in pure form for dental restorations 
E)  Both B and C 
A)  Is much harder than gold 
B)  Has poor corrosion resistance 
C)  Has a much lower melting point than gold 
D)  May be used in pure form for dental restorations 
E)  Both B and C

Question 15

High-density alloys are sold by ________ and cost _________ by ________ in any given volume of restoration.

Accepted Answer

A)  grams; less; dose 
B)  mass; more; mass 
C)  mass; less; dose 
D)  grams; less; mass 
A)  grams; less; dose 
B)  mass; more; mass 
C)  mass; less; dose 
D)  grams; less; mass

Question 16

Noble alloys must have at least 15% noble metal content. Noble content must include gold to be classified.

Accepted Answer

A)  Statement 1 is correct; statement 2 is correct. 
B)  Statement 1 is correct; statement 2 is incorrect. 
C)  Statement 1 is incorrect; statement 2 is correct. 
D)  Statement 1 is incorrect; statement 2 is incorrect. 
A)  Statement 1 is correct; statement 2 is correct. 
B)  Statement 1 is correct; statement 2 is incorrect. 
C)  Statement 1 is incorrect; statement 2 is correct. 
D)  Statement 1 is incorrect; statement 2 is incorrect.

Question 17

Which of the following statements is(are) true of dental alloy crystal structure and grains?

Accepted Answer

A)  The areas between crystals in an alloy are called grain boundaries. 
B)  A large grain size is generally more desirable than a large grain size for dental alloy properties. 
C)  If an alloy is rolled into a sheet or drawn into a wire, the grain structure takes on a fibrous appearance. 
D)  A, B, and C are correct. 
E)  B and C are correct. 
A)  The areas between crystals in an alloy are called grain boundaries. 
B)  A large grain size is generally more desirable than a large grain size for dental alloy properties. 
C)  If an alloy is rolled into a sheet or drawn into a wire, the grain structure takes on a fibrous appearance. 
D)  A, B, and C are correct. 
E)  B and C are correct.

Question 18

What are PGP wires used for?

Accepted Answer

A)  Endodontic files 
B)  Orthodontic wires 
C)  Clasps in removable partial dentures 
D)  Substructures for fixed partial dentures 
A)  Endodontic files 
B)  Orthodontic wires 
C)  Clasps in removable partial dentures 
D)  Substructures for fixed partial dentures

Question 19

Compare and contrast high-noble metals, noble metals, and base metals.

Accepted Answer

High-noble: High-noble alloys are expens

Question 20

The ceramic must ________ and bond to the alloy at a temperature below the solidus.

Accepted Answer

A)  liquefy 
B)  sinter 
C)  melt 
D)  flow 
A)  liquefy 
B)  sinter 
C)  melt 
D)  flow

When are solders used in dentistry?

According to the ADA classification for dental casting alloys, high-noble alloys must have a noble metal content of at least ____% by weight.

People are most likely to have an allergic reaction to which of the following base metals used in dentistry?

Biocompatibility of dental alloys is often based on _____ of the alloy.

What factors determine the definition of a noble metal?

Which of the following is not an organization that classifies and certifies alloys?

The color of oxides on metal varies from _ on high-noble alloys and some noble alloys to _ oxides on some base-metal alloys.

If an alloy contains 40 wt % gold, 20 wt % palladium, 10 wt % platinum, and 30 wt % copper, the nobility would be _____ wt %.

The ________ of an alloy is the mass in grams that occupies a volume of 1 cubic centimeter.

The correct order of firing to create sintered alloy composites is firing 1. of a ceramic that mediates ceramic-alloy bonding. 2) to create a spongy coping of high-noble metals. 3) of a lower fusing alloy that is absorbed by capillary action.

Which of the following statements is(are) true of the density of an alloy?

________ alloys are first cast but then shaped by mechanical force into their final forms.

Of all the alloys, which alloys are the most difficult to cast and polish?

Which of the following is correct about palladium?

High-density alloys are sold by ____ and cost _ by ____ in any given volume of restoration.

Noble alloys must have at least 15% noble metal content. Noble content must include gold to be classified.

Which of the following statements is(are) true of dental alloy crystal structure and grains?

What are PGP wires used for?

Compare and contrast high-noble metals, noble metals, and base metals.

The ceramic must ________ and bond to the alloy at a temperature below the solidus.

Introduction to Restorative Dental Materials

Properties of Materials

Preventive Dental Materials

Direct Esthetic Restorative Materials

Dental Amalgam

Finishing, Polishing, and Cleansing Materials

Cements

Impression Materials

Model and Die Materials

Waxes

Casting, Soldering, and Welding

Polymers in Prosthodontics

Dental Ceramics

Dental Implants

Filters

Exam 11: Casting Alloys, Wrought Alloys, and Solders

When are solders used in dentistry?

According to the ADA classification for dental casting alloys, high-noble alloys must have a noble metal content of at least ____% by weight.

People are most likely to have an allergic reaction to which of the following base metals used in dentistry?

Biocompatibility of dental alloys is often based on _____ of the alloy.

What factors determine the definition of a noble metal?

Which of the following is not an organization that classifies and certifies alloys?

The color of oxides on metal varies from _________ on high-noble alloys and some noble alloys to _________ oxides on some base-metal alloys.

If an alloy contains 40 wt % gold, 20 wt % palladium, 10 wt % platinum, and 30 wt % copper, the nobility would be _____ wt %.

The ________ of an alloy is the mass in grams that occupies a volume of 1 cubic centimeter.

The correct order of firing to create sintered alloy composites is firing 1. of a ceramic that mediates ceramic-alloy bonding. 2) to create a spongy coping of high-noble metals. 3) of a lower fusing alloy that is absorbed by capillary action.

Which of the following statements is(are) true of the density of an alloy?

________ alloys are first cast but then shaped by mechanical force into their final forms.

Of all the alloys, which alloys are the most difficult to cast and polish?

Which of the following is correct about palladium?

High-density alloys are sold by ________ and cost _________ by ________ in any given volume of restoration.

Noble alloys must have at least 15% noble metal content. Noble content must include gold to be classified.

Which of the following statements is(are) true of dental alloy crystal structure and grains?

What are PGP wires used for?

Compare and contrast high-noble metals, noble metals, and base metals.

The ceramic must ________ and bond to the alloy at a temperature below the solidus.

Introduction to Restorative Dental Materials

Properties of Materials

Preventive Dental Materials

Direct Esthetic Restorative Materials

Dental Amalgam

Finishing, Polishing, and Cleansing Materials

Cements

Impression Materials

Model and Die Materials

Waxes

Casting, Soldering, and Welding

Polymers in Prosthodontics

Dental Ceramics

Dental Implants

Filters

The color of oxides on metal varies from _ on high-noble alloys and some noble alloys to _ oxides on some base-metal alloys.

High-density alloys are sold by ____ and cost _ by ____ in any given volume of restoration.