Question 1

Match the items with the correct description below.
-Base-metal alloy

Accepted Answer

A) Alloy composed of non-noble metals 
B) A mixture of two or more metals 
C) Alloy containing at least 60% noble metals,40% of which must be gold 
D) Classification of metal based on its high cost 
E) Alloy composed of metals that do not corrode readily 
A) Alloy composed of non-noble metals 
B) A mixture of two or more metals 
C) Alloy containing at least 60% noble metals,40% of which must be gold 
D) Classification of metal based on its high cost 
E) Alloy composed of metals that do not corrode readily

Question 2

Which of the following would not be considered an extracoronal restoration?

Accepted Answer

A)  Inlay 
B)  Onlay 
C)  Crown 
A)  Inlay 
B)  Onlay 
C)  Crown

Question 3

During conventional root canal therapy,the root canal space is sealed with _____ so that bacteria cannot grow in the space.

Accepted Answer

A)  gutta percha 
B)  chlorobutanol 
C)  zinc phosphate 
D)  silver amalgam 
A)  gutta percha 
B)  chlorobutanol 
C)  zinc phosphate 
D)  silver amalgam

Question 4

Which of the following base metals has the highest incidence of allergic response?

Accepted Answer

A)  Nickel 
B)  Chromium 
C)  Beryllium 
D)  Gallium 
A)  Nickel 
B)  Chromium 
C)  Beryllium 
D)  Gallium

Question 5

Match the items with the correct description below.
-Noble alloy

Accepted Answer

A) Alloy composed of non-noble metals 
B) A mixture of two or more metals 
C) Alloy containing at least 60% noble metals,40% of which must be gold 
D) Classification of metal based on its high cost 
E) Alloy composed of metals that do not corrode readily 
A) Alloy composed of non-noble metals 
B) A mixture of two or more metals 
C) Alloy containing at least 60% noble metals,40% of which must be gold 
D) Classification of metal based on its high cost 
E) Alloy composed of metals that do not corrode readily

Question 6

Why is flux used when gold castings are soldered?

Accepted Answer

A)  Prevent greening of the gold casting 
B)  Lower the melting range of the solder 
C)  Remove surface oxides so that the solder will flow freely 
D)  Prevent uneven heating of the unit,causing the gold to crack 
A)  Prevent greening of the gold casting 
B)  Lower the melting range of the solder 
C)  Remove surface oxides so that the solder will flow freely 
D)  Prevent uneven heating of the unit,causing the gold to crack

Question 7

Identify the wrought metals used for orthodontic wires.

Accepted Answer

Orthodontic wires are composed mostly of

Question 8

Why are silver-based solders used primarily in dentistry?

Accepted Answer

A)  Add contacts to a bridge 
B)  Join together units of a bridge 
C)  Create wires,brackets,and bands used in orthodontics 
D)  Solder wire components to removable orthodontic appliances 
A)  Add contacts to a bridge 
B)  Join together units of a bridge 
C)  Create wires,brackets,and bands used in orthodontics 
D)  Solder wire components to removable orthodontic appliances

Question 9

Why is flux used with solder?

Accepted Answer

A)  Increase adhesion 
B)  Prevent cracking 
C)  Remove oxidation 
D)  Reduce solder flow 
A)  Increase adhesion 
B)  Prevent cracking 
C)  Remove oxidation 
D)  Reduce solder flow

Question 10

The metals in porcelain bonding alloys are selected and blended so that they have which of the following properties?

Accepted Answer

A)  Small amounts of metals such as indium,iron,tin,or gallium are added to form oxides on the metal surface to which the porcelain will bond. 
B)  They have the ability to withstand the low temperatures at which porcelain is fired without distorting or melting. 
C)  They have a higher thermal expansion than gold alloys used for all-metal crowns. 
D)  Titanium and titanium alloys are added for easy handling. 
A)  Small amounts of metals such as indium,iron,tin,or gallium are added to form oxides on the metal surface to which the porcelain will bond. 
B)  They have the ability to withstand the low temperatures at which porcelain is fired without distorting or melting. 
C)  They have a higher thermal expansion than gold alloys used for all-metal crowns. 
D)  Titanium and titanium alloys are added for easy handling.

Question 11

How is the arch wire held to the orthodontic bracket?

Accepted Answer

A)  Cement 
B)  Magnets 
C)  Capillary adhesion 
D)  Ligature wire or elastics 
A)  Cement 
B)  Magnets 
C)  Capillary adhesion 
D)  Ligature wire or elastics

Question 12

Which of the following statements is true of noble dental casting alloys?

Accepted Answer

A)  They require gold and must contain at least 25% noble metals by weight. 
B)  They do not require gold and require less than 25% by weight of noble metals. 
C)  They do not require any gold but must contain at least 25% noble metals by weight. 
D)  They must contain at least 60% by weight of noble alloys,of which gold must account for at least 40% by weight. 
A)  They require gold and must contain at least 25% noble metals by weight. 
B)  They do not require gold and require less than 25% by weight of noble metals. 
C)  They do not require any gold but must contain at least 25% noble metals by weight. 
D)  They must contain at least 60% by weight of noble alloys,of which gold must account for at least 40% by weight.

Question 13

Match the items with the correct description below.
-High-noble alloy

Accepted Answer

A) Alloy composed of non-noble metals 
B) A mixture of two or more metals 
C) Alloy containing at least 60% noble metals,40% of which must be gold 
D) Classification of metal based on its high cost 
E) Alloy composed of metals that do not corrode readily 
A) Alloy composed of non-noble metals 
B) A mixture of two or more metals 
C) Alloy containing at least 60% noble metals,40% of which must be gold 
D) Classification of metal based on its high cost 
E) Alloy composed of metals that do not corrode readily

Question 14

Patients who have an adverse reaction to base-metal appliances such as partial dentures are typically allergic to which metal?

Accepted Answer

A)  Chrome 
B)  Cobalt 
C)  Nickel 
D)  Titanium 
A)  Chrome 
B)  Cobalt 
C)  Nickel 
D)  Titanium

Question 15

Which of the following is true of the preparation of the metal substructure for porcelain-bonded-to-metal crowns?

Accepted Answer

A)  The metal substructure should have sharp angles. 
B)  The metal substructure must be concave in shape. 
C)  The metal substructure must be at least 1.5 mm thick. 
D)  To make room for the metal substructure and porcelain,these crowns require greater reduction of the tooth than all-metal crowns. 
A)  The metal substructure should have sharp angles. 
B)  The metal substructure must be concave in shape. 
C)  The metal substructure must be at least 1.5 mm thick. 
D)  To make room for the metal substructure and porcelain,these crowns require greater reduction of the tooth than all-metal crowns.

Match the items with the correct description below. -Base-metal alloy

Which of the following would not be considered an extracoronal restoration?

During conventional root canal therapy,the root canal space is sealed with _____ so that bacteria cannot grow in the space.

Which of the following base metals has the highest incidence of allergic response?

Match the items with the correct description below. -Noble alloy

Why is flux used when gold castings are soldered?

Identify the wrought metals used for orthodontic wires.

Why are silver-based solders used primarily in dentistry?

Why is flux used with solder?

The metals in porcelain bonding alloys are selected and blended so that they have which of the following properties?

How is the arch wire held to the orthodontic bracket?

Which of the following statements is true of noble dental casting alloys?

Match the items with the correct description below. -High-noble alloy

Patients who have an adverse reaction to base-metal appliances such as partial dentures are typically allergic to which metal?

Which of the following is true of the preparation of the metal substructure for porcelain-bonded-to-metal crowns?

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

Dental Amalgam

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 11: Casting Metals, solders, and Wrought Metal Alloys

Match the items with the correct description below. -Base-metal alloy

Which of the following would not be considered an extracoronal restoration?

During conventional root canal therapy,the root canal space is sealed with _____ so that bacteria cannot grow in the space.

Which of the following base metals has the highest incidence of allergic response?

Match the items with the correct description below. -Noble alloy

Why is flux used when gold castings are soldered?

Identify the wrought metals used for orthodontic wires.

Why are silver-based solders used primarily in dentistry?

Why is flux used with solder?

The metals in porcelain bonding alloys are selected and blended so that they have which of the following properties?

How is the arch wire held to the orthodontic bracket?

Which of the following statements is true of noble dental casting alloys?

Match the items with the correct description below. -High-noble alloy

Patients who have an adverse reaction to base-metal appliances such as partial dentures are typically allergic to which metal?

Which of the following is true of the preparation of the metal substructure for porcelain-bonded-to-metal crowns?

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

Dental Amalgam

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