Question 1

Match the items with the correct description below.
-Phase that consists of mercury reacting with tin

Accepted Answer

A) Gamma phase (Ƴ) 
B) Gamma-1 phase (Ƴ1) 
C) Gamma-2 phase (Ƴ2) 
A) Gamma phase (Ƴ) 
B) Gamma-1 phase (Ƴ1) 
C) Gamma-2 phase (Ƴ2) C

Question 2

Which of the following is true of tarnish?

Accepted Answer

A)  It is very destructive to the amalgam. 
B)  Polishing the restoration will increase the tarnish. 
C)  The smoother the surface,the more it tends to tarnish. 
D)  It results from contact with oxygen,chlorides,and sulfides in the mouth. 
A)  It is very destructive to the amalgam. 
B)  Polishing the restoration will increase the tarnish. 
C)  The smoother the surface,the more it tends to tarnish. 
D)  It results from contact with oxygen,chlorides,and sulfides in the mouth. D

Question 3

Spherical alloys require _____ mercury to wet the particles and generally set _____ than lathe-cut particles.

Accepted Answer

A)  more;more quickly 
B)  more;more slowly 
C)  less;more quickly 
D)  less;more slowly 
A)  more;more quickly 
B)  more;more slowly 
C)  less;more quickly 
D)  less;more slowly C

Question 4

Patients should be advised to avoid chewing on a newly placed amalgam for at least:

Accepted Answer

A)  8 minutes. 
B)  8 hours. 
C)  2 days. 
D)  2 weeks. 
A)  8 minutes. 
B)  8 hours. 
C)  2 days. 
D)  2 weeks.

Question 5

It takes up to _____ for most amalgams to gain their maximum strength.

Accepted Answer

A)  30 minutes 
B)  1 hour 
C)  12 hours 
D)  24 hours 
A)  30 minutes 
B)  1 hour 
C)  12 hours 
D)  24 hours

Question 6

Polishing of amalgam restorations should be:

Accepted Answer

A)  dry with a light touch. 
B)  wet with a light touch. 
C)  dry with heavy pressure. 
D)  wet with heavy pressure. 
A)  dry with a light touch. 
B)  wet with a light touch. 
C)  dry with heavy pressure. 
D)  wet with heavy pressure.

Question 7

What is the result if an amalgam restoration corrodes?

Accepted Answer

A)  Weakens over time 
B)  Stains surrounding tooth 
C)  Breaks down at the margins 
D)  All of the above are possible. 
A)  Weakens over time 
B)  Stains surrounding tooth 
C)  Breaks down at the margins 
D)  All of the above are possible.

Question 8

Describe the different particle shapes in amalgam alloys.

Accepted Answer

•Lathe-cut alloy: Irregularly shaped par

Question 9

Why is the cavity preparation slightly overfilled during the placement and condensation of amalgam?

Accepted Answer

A)  Increases the overall height of the patient's bite forced to the surface during the condensation process 
B)  Makes sure no material goes to waste in the amalgam well 
C)  Forms the initial surface anatomy when the patient occludes against the opposing dentition 
D)  Allows enough material to carve to contours and remove excess mercury 
A)  Increases the overall height of the patient's bite forced to the surface during the condensation process 
B)  Makes sure no material goes to waste in the amalgam well 
C)  Forms the initial surface anatomy when the patient occludes against the opposing dentition 
D)  Allows enough material to carve to contours and remove excess mercury

Question 10

List the main components of amalgam alloy and describe their function.

Accepted Answer

•Silver: Strength,corrosion
•T

Question 11

Why is it not as necessary to polish today's generation of amalgam restorations as it was to polish earlier amalgams?

Accepted Answer

A)  They are high in copper,which is shiny. 
B)  They are low in copper and don't tarnish. 
C)  They are well burnished to finish them. 
D)  They set faster,so it is not necessary. 
A)  They are high in copper,which is shiny. 
B)  They are low in copper and don't tarnish. 
C)  They are well burnished to finish them. 
D)  They set faster,so it is not necessary.

Question 12

When the silver-based alloy used to create dental amalgam is mixed with _____,the reaction that occurs is called amalgamation.

Accepted Answer

A)  methyl methacrylate 
B)  a bonding agent 
C)  an acid etchant 
D)  mercury 
A)  methyl methacrylate 
B)  a bonding agent 
C)  an acid etchant 
D)  mercury

Question 13

Creep is a phenomenon associated with the gamma-_____ phase seen with _____-copper amalgam alloys.

Accepted Answer

A)  1;high 
B)  1;low 
C)  2;high 
D)  2;low 
A)  1;high 
B)  1;low 
C)  2;high 
D)  2;low

Question 14

Match the items with the correct description below.
-Phase that consists of mercury reacting with the silver

Accepted Answer

A) Gamma phase (Ƴ) 
B) Gamma-1 phase (Ƴ1) 
C) Gamma-2 phase (Ƴ2) 
A) Gamma phase (Ƴ) 
B) Gamma-1 phase (Ƴ1) 
C) Gamma-2 phase (Ƴ2)

Question 15

Which of the following metals is used to control the rate of set of the amalgam?

Accepted Answer

A)  Silver 
B)  Copper 
C)  Tin 
D)  Mercury 
A)  Silver 
B)  Copper 
C)  Tin 
D)  Mercury

Question 16

List the advantages and disadvantages of amalgam.

Accepted Answer

Advantages
•Can withstand high chewing f

Question 17

High-copper alloys gain about 50% of their compressive strength:

Accepted Answer

A)  after 1 hour. 
B)  after 10 hours. 
C)  after 24 hours. 
D)  immediately. 
A)  after 1 hour. 
B)  after 10 hours. 
C)  after 24 hours. 
D)  immediately.

Question 18

Match the items with the correct description below.
-Strongest phase

Accepted Answer

A) Gamma phase (Ƴ) 
B) Gamma-1 phase (Ƴ1) 
C) Gamma-2 phase (Ƴ2) 
A) Gamma phase (Ƴ) 
B) Gamma-1 phase (Ƴ1) 
C) Gamma-2 phase (Ƴ2)

Question 19

When spherical high-copper dental amalgam alloys are contrasted with admixed dental amalgam alloys,the spherical alloy:

Accepted Answer

A)  needs approximately 10% more mercury than the admixed alloy for the amalgamation process. 
B)  has very little resistance to condensation into the cavity preparation and feels soft compared with an admixed amalgam. 
C)  displaces a matrix band and keeps it in contact with the adjacent tooth in class II preparations better than admixed amalgams. 
D)  has lower 1-hour and 24-hour compressive strengths than admixed amalgams. 
A)  needs approximately 10% more mercury than the admixed alloy for the amalgamation process. 
B)  has very little resistance to condensation into the cavity preparation and feels soft compared with an admixed amalgam. 
C)  displaces a matrix band and keeps it in contact with the adjacent tooth in class II preparations better than admixed amalgams. 
D)  has lower 1-hour and 24-hour compressive strengths than admixed amalgams.

Question 20

Which of the following is true concerning mercury safety procedures in the dental office?

Accepted Answer

A)  A "mercury-free" amalgam is available for use in the United States. 
B)  The elemental mercury used in amalgam is more toxic than organic mercury. 
C)  Dental offices contribute an insignificant amount of mercury to the environment. 
D)  Studies have shown mercury levels in most dental offices to be far below OSHA's recommended minimum. 
A)  A "mercury-free" amalgam is available for use in the United States. 
B)  The elemental mercury used in amalgam is more toxic than organic mercury. 
C)  Dental offices contribute an insignificant amount of mercury to the environment. 
D)  Studies have shown mercury levels in most dental offices to be far below OSHA's recommended minimum.

Match the items with the correct description below. -Phase that consists of mercury reacting with tin

Which of the following is true of tarnish?

Spherical alloys require _ mercury to wet the particles and generally set _ than lathe-cut particles.

Patients should be advised to avoid chewing on a newly placed amalgam for at least:

It takes up to _____ for most amalgams to gain their maximum strength.

Polishing of amalgam restorations should be:

What is the result if an amalgam restoration corrodes?

Describe the different particle shapes in amalgam alloys.

Why is the cavity preparation slightly overfilled during the placement and condensation of amalgam?

List the main components of amalgam alloy and describe their function.

Why is it not as necessary to polish today's generation of amalgam restorations as it was to polish earlier amalgams?

When the silver-based alloy used to create dental amalgam is mixed with _____,the reaction that occurs is called amalgamation.

Creep is a phenomenon associated with the gamma-_ phase seen with _-copper amalgam alloys.

Match the items with the correct description below. -Phase that consists of mercury reacting with the silver

Which of the following metals is used to control the rate of set of the amalgam?

List the advantages and disadvantages of amalgam.

High-copper alloys gain about 50% of their compressive strength:

Match the items with the correct description below. -Strongest phase

When spherical high-copper dental amalgam alloys are contrasted with admixed dental amalgam alloys,the spherical alloy:

Which of the following is true concerning mercury safety procedures in the dental office?

Introduction to Dental Materials

Oral Environment and Patient Considerations

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

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 10: Dental Amalgam

Match the items with the correct description below. -Phase that consists of mercury reacting with tin

Which of the following is true of tarnish?

Spherical alloys require _____ mercury to wet the particles and generally set _____ than lathe-cut particles.

Patients should be advised to avoid chewing on a newly placed amalgam for at least:

It takes up to _____ for most amalgams to gain their maximum strength.

Polishing of amalgam restorations should be:

What is the result if an amalgam restoration corrodes?

Describe the different particle shapes in amalgam alloys.

Why is the cavity preparation slightly overfilled during the placement and condensation of amalgam?

List the main components of amalgam alloy and describe their function.

Why is it not as necessary to polish today's generation of amalgam restorations as it was to polish earlier amalgams?

When the silver-based alloy used to create dental amalgam is mixed with _____,the reaction that occurs is called amalgamation.

Creep is a phenomenon associated with the gamma-_____ phase seen with _____-copper amalgam alloys.

Match the items with the correct description below. -Phase that consists of mercury reacting with the silver

Which of the following metals is used to control the rate of set of the amalgam?

List the advantages and disadvantages of amalgam.

High-copper alloys gain about 50% of their compressive strength:

Match the items with the correct description below. -Strongest phase

When spherical high-copper dental amalgam alloys are contrasted with admixed dental amalgam alloys,the spherical alloy:

Which of the following is true concerning mercury safety procedures in the dental office?

Introduction to Dental Materials

Oral Environment and Patient Considerations

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

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

Spherical alloys require _ mercury to wet the particles and generally set _ than lathe-cut particles.

Creep is a phenomenon associated with the gamma-_ phase seen with _-copper amalgam alloys.