Question 1

Modern dental amalgams are considered to be high in _____ content compared with their predecessors.

Accepted Answer

A)  copper 
B)  silver 
C)  zinc 
D)  tin 
A)  copper 
B)  silver 
C)  zinc 
D)  tin

Question 2

Match the items with the correct description below.
-Phase that is weak and corrodes easily

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 3

Amalgam goes through three phases when setting,the weakest of which is the _____ phase.

Accepted Answer

A)  gamma 
B)  gamma-1 
C)  gamma-2 
A)  gamma 
B)  gamma-1 
C)  gamma-2

Question 4

Which of the following may happen if a newly placed amalgam contracts excessively?

Accepted Answer

A)  It can put pressure on the cusps. 
B)  It will open gaps at the margins,contribute to leakage of fluids and bacteria,and cause sensitivity. 
C)  It can cause pain with biting pressure. 
D)  It can result in fracture of the cusps. 
A)  It can put pressure on the cusps. 
B)  It will open gaps at the margins,contribute to leakage of fluids and bacteria,and cause sensitivity. 
C)  It can cause pain with biting pressure. 
D)  It can result in fracture of the cusps.

Question 5

Which of the following would not be hygienic when amalgam material is used?

Accepted Answer

A)  The floor is carpeted. 
B)  The rubber dam is placed. 
C)  The assistant uses the HVE. 
D)  Staff wears PPE when handling. 
A)  The floor is carpeted. 
B)  The rubber dam is placed. 
C)  The assistant uses the HVE. 
D)  Staff wears PPE when handling.

Question 6

Amalgam restorations are a combination of which alloys?

Accepted Answer

A)  Copper and tin 
B)  Silver and mercury 
C)  Specific amounts of each of the above 
A)  Copper and tin 
B)  Silver and mercury 
C)  Specific amounts of each of the above

Question 7

Match the items with the correct description below.
-The silver alloy 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 8

For what reason have insurance carriers seen a reduction in the use of dental amalgam for posterior restorations by approximately 45% in the past 20 years?

Accepted Answer

A)  Other direct restorative materials have superior durability,ease of handling,and physical characteristics. 
B)  Its wear resistance and compressive strength are inferior to composite resin and glass ionomer cement. 
C)  A study conducted by the National Institutes of Health (NIH)in 1991-1993 concluded that amalgam is not safe for human use. 
D)  Concerns by patients about its safety and its lack of esthetics have prompted many patients to request tooth-colored materials. 
A)  Other direct restorative materials have superior durability,ease of handling,and physical characteristics. 
B)  Its wear resistance and compressive strength are inferior to composite resin and glass ionomer cement. 
C)  A study conducted by the National Institutes of Health (NIH)in 1991-1993 concluded that amalgam is not safe for human use. 
D)  Concerns by patients about its safety and its lack of esthetics have prompted many patients to request tooth-colored materials.

Question 9

Match the items with the correct description below.
-Phase with the least corrosion

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 10

Undertriturated amalgam alloy has a _____ appearance and sets too _____,resulting in a weaker restoration.

Accepted Answer

A)  dry,crumbly;quickly 
B)  dry,crumbly;slowly 
C)  wet;quickly 
D)  wet;slowly 
A)  dry,crumbly;quickly 
B)  dry,crumbly;slowly 
C)  wet;quickly 
D)  wet;slowly

Question 11

Which of the following statements is true of high-copper amalgams in contrast to low-copper amalgams?

Accepted Answer

A)  High-copper amalgams are more durable than low-copper amalgams. 
B)  High-copper amalgams have more corrosion than low-copper amalgams. 
C)  High-copper amalgams have more deterioration at the margins than low-copper amalgams. 
D)  High-copper amalgams have more of the gamma-2 product than low-copper amalgams. 
A)  High-copper amalgams are more durable than low-copper amalgams. 
B)  High-copper amalgams have more corrosion than low-copper amalgams. 
C)  High-copper amalgams have more deterioration at the margins than low-copper amalgams. 
D)  High-copper amalgams have more of the gamma-2 product than low-copper amalgams.

Question 12

Why is the wet resin technique used under an amalgam restoration?

Accepted Answer

A)  Bond the amalgam to the tooth 
B)  Keep the tooth from staining 
C)  Decrease sensitivity 
D)  Seal dental tubules 
A)  Bond the amalgam to the tooth 
B)  Keep the tooth from staining 
C)  Decrease sensitivity 
D)  Seal dental tubules

Question 13

Compared to composites or glass ionomers,amalgams are higher in compression strength but weaker in:

Accepted Answer

A)  stress and shear. 
B)  stress and strain. 
C)  tension and shear. 
D)  flexion and tension. 
A)  stress and shear. 
B)  stress and strain. 
C)  tension and shear. 
D)  flexion and tension.

Question 14

What will occur if one attempts to carve amalgam once the amalgam is set?

Accepted Answer

A)  Seal the margins 
B)  Damage the margins 
C)  Make the surface dull 
D)  Make the surface shiny 
A)  Seal the margins 
B)  Damage the margins 
C)  Make the surface dull 
D)  Make the surface shiny

Question 15

High-copper amalgams do not have a _____ phase and are superior in their clinical performance to low-copper amalgams.

Accepted Answer

A)  gamma 
B)  gamma-1 
C)  gamma-2 
D)  gamma-1 or gamma-2 
A)  gamma 
B)  gamma-1 
C)  gamma-2 
D)  gamma-1 or gamma-2

Question 16

In the low-copper amalgams,zinc was responsible for the gradual _____ of the amalgam over time if moisture contamination was present during placement.

Accepted Answer

A)  tarnish 
B)  corrosion 
C)  expansion 
D)  contraction 
A)  tarnish 
B)  corrosion 
C)  expansion 
D)  contraction

Question 17

Which of the following statements is true regarding the strength of dental amalgam?

Accepted Answer

A)  Amalgams are stronger in compression than composites but weaker than glass ionomers. 
B)  Amalgams are relatively weak in tension and shear and therefore require adequate bulk to resist breaking. 
C)  Some high-copper amalgams gain approximately 80% of their strength in the first hour. 
D)  High-copper amalgams have a much higher compressive strength than low-copper amalgams once they have completely set at about 24 hours. 
A)  Amalgams are stronger in compression than composites but weaker than glass ionomers. 
B)  Amalgams are relatively weak in tension and shear and therefore require adequate bulk to resist breaking. 
C)  Some high-copper amalgams gain approximately 80% of their strength in the first hour. 
D)  High-copper amalgams have a much higher compressive strength than low-copper amalgams once they have completely set at about 24 hours.

Question 18

What mechanical device mixes the dental amalgam alloy and mercury?

Accepted Answer

A)  Condenser 
B)  Triturator 
C)  Carrier 
D)  Plugger 
A)  Condenser 
B)  Triturator 
C)  Carrier 
D)  Plugger

Question 19

How will properly triturated amalgam appear?

Accepted Answer

A)  A satiny ball 
B)  Dry and shiny 
C)  Shiny and wet 
D)  Dry and crumbled 
A)  A satiny ball 
B)  Dry and shiny 
C)  Shiny and wet 
D)  Dry and crumbled

Modern dental amalgams are considered to be high in _____ content compared with their predecessors.

Match the items with the correct description below. -Phase that is weak and corrodes easily

Amalgam goes through three phases when setting,the weakest of which is the _____ phase.

Which of the following may happen if a newly placed amalgam contracts excessively?

Which of the following would not be hygienic when amalgam material is used?

Amalgam restorations are a combination of which alloys?

Match the items with the correct description below. -The silver alloy phase

For what reason have insurance carriers seen a reduction in the use of dental amalgam for posterior restorations by approximately 45% in the past 20 years?

Match the items with the correct description below. -Phase with the least corrosion

Undertriturated amalgam alloy has a _ appearance and sets too _,resulting in a weaker restoration.

Which of the following statements is true of high-copper amalgams in contrast to low-copper amalgams?

Why is the wet resin technique used under an amalgam restoration?

Compared to composites or glass ionomers,amalgams are higher in compression strength but weaker in:

What will occur if one attempts to carve amalgam once the amalgam is set?

High-copper amalgams do not have a _____ phase and are superior in their clinical performance to low-copper amalgams.

In the low-copper amalgams,zinc was responsible for the gradual _____ of the amalgam over time if moisture contamination was present during placement.

Which of the following statements is true regarding the strength of dental amalgam?

What mechanical device mixes the dental amalgam alloy and mercury?

How will properly triturated amalgam appear?

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

Modern dental amalgams are considered to be high in _____ content compared with their predecessors.

Match the items with the correct description below. -Phase that is weak and corrodes easily

Amalgam goes through three phases when setting,the weakest of which is the _____ phase.

Which of the following may happen if a newly placed amalgam contracts excessively?

Which of the following would not be hygienic when amalgam material is used?

Amalgam restorations are a combination of which alloys?

Match the items with the correct description below. -The silver alloy phase

For what reason have insurance carriers seen a reduction in the use of dental amalgam for posterior restorations by approximately 45% in the past 20 years?

Match the items with the correct description below. -Phase with the least corrosion

Undertriturated amalgam alloy has a _____ appearance and sets too _____,resulting in a weaker restoration.

Which of the following statements is true of high-copper amalgams in contrast to low-copper amalgams?

Why is the wet resin technique used under an amalgam restoration?

Compared to composites or glass ionomers,amalgams are higher in compression strength but weaker in:

What will occur if one attempts to carve amalgam once the amalgam is set?

High-copper amalgams do not have a _____ phase and are superior in their clinical performance to low-copper amalgams.

In the low-copper amalgams,zinc was responsible for the gradual _____ of the amalgam over time if moisture contamination was present during placement.

Which of the following statements is true regarding the strength of dental amalgam?

What mechanical device mixes the dental amalgam alloy and mercury?

How will properly triturated amalgam appear?

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

Undertriturated amalgam alloy has a _ appearance and sets too _,resulting in a weaker restoration.