Question 1

Which of the following is true about polymers?

Accepted Answer

A)  They are large,long-chain molecules. 
B)  They are small,long-chain molecules. 
C)  They are large,short-chain molecules. 
D)  They are small,short-chain molecules. 
A)  They are large,long-chain molecules. 
B)  They are small,long-chain molecules. 
C)  They are large,short-chain molecules. 
D)  They are small,short-chain molecules.

Question 2

Which of the following correctly represents the stages seen when acrylic powder and liquid are mixed together?

Accepted Answer

A)  Dough,sandy,rubber,and stringy 
B)  Stringy,sandy,dough,and rubber 
C)  Sandy,stringy,dough,and rubber 
D)  Rubber,stringy,dough,and sandy 
A)  Dough,sandy,rubber,and stringy 
B)  Stringy,sandy,dough,and rubber 
C)  Sandy,stringy,dough,and rubber 
D)  Rubber,stringy,dough,and sandy

Question 3

How are dentures customized?

Accepted Answer

A)  Recreating diastemas 
B)  Placing restorations in the acrylic teeth 
C)  Changing acrylic shades to match skin tone 
D)  All of the above are possible. 
A)  Recreating diastemas 
B)  Placing restorations in the acrylic teeth 
C)  Changing acrylic shades to match skin tone 
D)  All of the above are possible.

Question 4

Which of the following is true regarding addition polymerization?

Accepted Answer

A)  It occurs in three stages: initiation,margination,and condensation. 
B)  Monomers have a core of two silicon atoms joined by a double bond. 
C)  One carbon atom has two hydrogen atoms attached,and the other carbon atom has attached to it one hydrogen atom and one reactive group called a free radical. 
D)  The reaction produces by-products such as water,hydrogen gas,or alcohol that may compromise the physical properties or handling characteristics. 
A)  It occurs in three stages: initiation,margination,and condensation. 
B)  Monomers have a core of two silicon atoms joined by a double bond. 
C)  One carbon atom has two hydrogen atoms attached,and the other carbon atom has attached to it one hydrogen atom and one reactive group called a free radical. 
D)  The reaction produces by-products such as water,hydrogen gas,or alcohol that may compromise the physical properties or handling characteristics.

Question 5

The monomer will _____ if the temperature becomes too great during the polymerization process.

Accepted Answer

A)  vaporize and produce porosity 
B)  cause crazing of the material 
C)  bleach the denture white 
D)  warp the prosthesis 
A)  vaporize and produce porosity 
B)  cause crazing of the material 
C)  bleach the denture white 
D)  warp the prosthesis

Question 6

What are record bases used for?

Accepted Answer

A)  To obtain secondary impressions for creation of secondary or master casts 
B)  To establish the proper dimension between upper and lower arches 
C)  To obtain final crown and bridge impressions 
D)  To fabricate porcelain veneers 
A)  To obtain secondary impressions for creation of secondary or master casts 
B)  To establish the proper dimension between upper and lower arches 
C)  To obtain final crown and bridge impressions 
D)  To fabricate porcelain veneers

Question 7

Which of the following is the correct sequence to prepare a broken denture for denture repair with chemical-cured acrylic repair material?
1)Place a coating of the liquid monomer on the roughened surface to wet and prime them.
2)Pour plaster or stone in the prosthesis to create a cast on which to stabilize the parts while they are being repaired.
3)Piece the broken pieces together with sticky wax.
4)Cut the fracture line with an acrylic bur.

Accepted Answer

A)  1,3,2,4 
B)  2,1,4,3 
C)  3,2,1,4 
D)  3,2,4,1 
A)  1,3,2,4 
B)  2,1,4,3 
C)  3,2,1,4 
D)  3,2,4,1

Question 8

What are denture teeth usually made of?

Accepted Answer

A)  Plastic 
B)  Porcelain 
C)  Composite resin 
D)  Any of the above 
A)  Plastic 
B)  Porcelain 
C)  Composite resin 
D)  Any of the above

Question 9

Which of the following is true regarding the properties of acrylic resins used in dentistry?

Accepted Answer

A)  Denture bases conduct temperature very well. 
B)  Heat-cured acrylic resins shrink about 0.6% by volume. 
C)  The strength of acrylic resins is comparable with dental amalgam. 
D)  The coefficient of thermal expansion of acrylic resins is more than twice that of composite resins. 
A)  Denture bases conduct temperature very well. 
B)  Heat-cured acrylic resins shrink about 0.6% by volume. 
C)  The strength of acrylic resins is comparable with dental amalgam. 
D)  The coefficient of thermal expansion of acrylic resins is more than twice that of composite resins.

Question 10

Home care of dentures would not include which of the following?

Accepted Answer

A)  Soaking in mouthwash to remove odors 
B)  Brushing with a denture brush after meals 
C)  Using a denture toothpaste to remove plaque 
D)  Soaking in white vinegar to remove calculus 
A)  Soaking in mouthwash to remove odors 
B)  Brushing with a denture brush after meals 
C)  Using a denture toothpaste to remove plaque 
D)  Soaking in white vinegar to remove calculus

Question 11

The most common form of polymerization in dentistry is:

Accepted Answer

A)  tertiary. 
B)  addition. 
C)  propagation. 
D)  condensation. 
A)  tertiary. 
B)  addition. 
C)  propagation. 
D)  condensation.

Question 12

Why do some clinicians place three or four 2-mm-diameter holes in the wax spacer in the anterior and posterior ridge regions?

Accepted Answer

A)  The spacer creates a uniform thickness for impression material. 
B)  The holes help prevent the wax from separating from the stone model. 
C)  Placing holes creates a mesh for bonding of acrylic to a metal framework. 
D)  It helps orient the tissue-bearing side of the tray toward the teeth. 
A)  The spacer creates a uniform thickness for impression material. 
B)  The holes help prevent the wax from separating from the stone model. 
C)  Placing holes creates a mesh for bonding of acrylic to a metal framework. 
D)  It helps orient the tissue-bearing side of the tray toward the teeth.

Question 13

Which of the following is true of long-term soft liners for complete and partial dentures?

Accepted Answer

A)  Silicone long-term liners are less stable over the long term than acrylic long-term liners because they have softeners that leach out. 
B)  Long-term liners may not be processed with the application of heat. 
C)  Long-term soft liners often do not form a good bond to old acrylic. 
D)  Silicone liners are easy to adjust. 
A)  Silicone long-term liners are less stable over the long term than acrylic long-term liners because they have softeners that leach out. 
B)  Long-term liners may not be processed with the application of heat. 
C)  Long-term soft liners often do not form a good bond to old acrylic. 
D)  Silicone liners are easy to adjust.

Question 14

Which of the following is not true about cross-linked polymers?

Accepted Answer

A)  The bonds are weak. 
B)  The bond is stronger and stiffer. 
C)  They have short chain atoms attached. 
D)  The material is not easily manipulated. 
A)  The bonds are weak. 
B)  The bond is stronger and stiffer. 
C)  They have short chain atoms attached. 
D)  The material is not easily manipulated.

Question 15

Match the items with the correct description below.
-Cross-linked polymers

Accepted Answer

A) A long-chain,high-molecular-weight molecule produced by the linking of many low-molecular-weight monomer molecules 
B) A polymer composed of numerous methyl methacrylate monomers linked together in a long chain 
C) The joining of adjacent long-chain polymers by bonding of short chains along their sides 
D) The act of forming polymers.The process can be activated by chemicals,heat,or light. 
E) Low-molecular-weight molecules that are joined to form polymers 
A) A long-chain,high-molecular-weight molecule produced by the linking of many low-molecular-weight monomer molecules 
B) A polymer composed of numerous methyl methacrylate monomers linked together in a long chain 
C) The joining of adjacent long-chain polymers by bonding of short chains along their sides 
D) The act of forming polymers.The process can be activated by chemicals,heat,or light. 
E) Low-molecular-weight molecules that are joined to form polymers

Question 16

Which of the following laboratory devices helps keep the monomer from evaporating during polymerization and creates a denser acrylic?

Accepted Answer

A)  Lathe 
B)  Pressure pot 
C)  Bunsen burner 
D)  Vacuum-forming machine 
A)  Lathe 
B)  Pressure pot 
C)  Bunsen burner 
D)  Vacuum-forming machine

Question 17

Match the items with the correct description below.
-Poly (methyl methacrylate)

Accepted Answer

A) A long-chain,high-molecular-weight molecule produced by the linking of many low-molecular-weight monomer molecules 
B) A polymer composed of numerous methyl methacrylate monomers linked together in a long chain 
C) The joining of adjacent long-chain polymers by bonding of short chains along their sides 
D) The act of forming polymers.The process can be activated by chemicals,heat,or light. 
E) Low-molecular-weight molecules that are joined to form polymers 
A) A long-chain,high-molecular-weight molecule produced by the linking of many low-molecular-weight monomer molecules 
B) A polymer composed of numerous methyl methacrylate monomers linked together in a long chain 
C) The joining of adjacent long-chain polymers by bonding of short chains along their sides 
D) The act of forming polymers.The process can be activated by chemicals,heat,or light. 
E) Low-molecular-weight molecules that are joined to form polymers

Which of the following is true about polymers?

Which of the following correctly represents the stages seen when acrylic powder and liquid are mixed together?

How are dentures customized?

Which of the following is true regarding addition polymerization?

The monomer will _____ if the temperature becomes too great during the polymerization process.

What are record bases used for?

What are denture teeth usually made of?

Which of the following is true regarding the properties of acrylic resins used in dentistry?

Home care of dentures would not include which of the following?

The most common form of polymerization in dentistry is:

Why do some clinicians place three or four 2-mm-diameter holes in the wax spacer in the anterior and posterior ridge regions?

Which of the following is true of long-term soft liners for complete and partial dentures?

Which of the following is not true about cross-linked polymers?

Match the items with the correct description below. -Cross-linked polymers

Which of the following laboratory devices helps keep the monomer from evaporating during polymerization and creates a denser acrylic?

Match the items with the correct description below. -Poly (methyl methacrylate)

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

Casting Metals, solders, and Wrought Metal Alloys

Dental Implants

Abrasion, finishing, and Polishing

Dental Cement

Impression Materials

Gypsum and Wax Products

Provisional Restorations

Preventive and Corrective Oral Appliances

Filters

Exam 17: Polymers for Prosthetic Dentistry

Which of the following is true about polymers?

Which of the following correctly represents the stages seen when acrylic powder and liquid are mixed together?

How are dentures customized?

Which of the following is true regarding addition polymerization?

The monomer will _____ if the temperature becomes too great during the polymerization process.

What are record bases used for?

What are denture teeth usually made of?

Which of the following is true regarding the properties of acrylic resins used in dentistry?

Home care of dentures would not include which of the following?

The most common form of polymerization in dentistry is:

Why do some clinicians place three or four 2-mm-diameter holes in the wax spacer in the anterior and posterior ridge regions?

Which of the following is true of long-term soft liners for complete and partial dentures?

Which of the following is not true about cross-linked polymers?

Match the items with the correct description below. -Cross-linked polymers

Which of the following laboratory devices helps keep the monomer from evaporating during polymerization and creates a denser acrylic?

Match the items with the correct description below. -Poly (methyl methacrylate)

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

Casting Metals, solders, and Wrought Metal Alloys

Dental Implants

Abrasion, finishing, and Polishing

Dental Cement

Impression Materials

Gypsum and Wax Products

Provisional Restorations

Preventive and Corrective Oral Appliances

Filters