Question 1

What is the organic matrix of composite resins made up of?

Accepted Answer

A)  BIS-GMA 
B)  Glass 
C)  Silica 
D)  Quartz 
A)  BIS-GMA 
B)  Glass 
C)  Silica 
D)  Quartz A

Question 2

In the polymerization process for composite resins,an activator causes an initiator molecule to form a _____ that breaks one of the carbon-to-carbon double bonds to form a single bond and another free radical.

Accepted Answer

A)  ketone 
B)  g-phase 
C)  eutectic 
D)  free radical 
A)  ketone 
B)  g-phase 
C)  eutectic 
D)  free radical D

Question 3

Which of the following is correct regarding nanohybrid composite resins?

Accepted Answer

A)  These are weak composites. 
B)  These composites cannot be polished to a high shine. 
C)  The shrinkage has been reduced from roughly 3% with earlier composites to less than 1% with some of the nanohybrids. 
D)  With more resin than previous generations,these composites shrink less when polymerized. 
A)  These are weak composites. 
B)  These composites cannot be polished to a high shine. 
C)  The shrinkage has been reduced from roughly 3% with earlier composites to less than 1% with some of the nanohybrids. 
D)  With more resin than previous generations,these composites shrink less when polymerized. C

Question 4

The fillers used in composite resins are:

Accepted Answer

A)  bis-GMAs. 
B)  inorganic silica particles. 
C)  urethane dimethacrylates (UDMAs). 
D)  low-molecular-weight monomers called TEGDMAs. 
A)  bis-GMAs. 
B)  inorganic silica particles. 
C)  urethane dimethacrylates (UDMAs). 
D)  low-molecular-weight monomers called TEGDMAs.

Question 5

Which of the following are advantages of laboratory-processed composite restorations over directly placed composites?
1)The restoration is denser.
2)The restoration polymerizes more completely.
3)More stress is created internally on the composite and the walls of the cavity preparation.

Accepted Answer

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

Question 6

Which statement is correct about flowable composite resins?

Accepted Answer

A)  They are useful for class I but not class V restorations. 
B)  They are useful as liners in large cavity preparations because they adapt to the preparation better than more viscous materials such as hybrid and packable composites. 
C)  They are high-viscosity,light-cured resins that may be lightly filled (about 40%)or more heavily filled (up to 70%). 
D)  They have a high elastic modulus,which allows them to cushion stresses created by polymerization shrinkage or heavy occlusal loads. 
A)  They are useful for class I but not class V restorations. 
B)  They are useful as liners in large cavity preparations because they adapt to the preparation better than more viscous materials such as hybrid and packable composites. 
C)  They are high-viscosity,light-cured resins that may be lightly filled (about 40%)or more heavily filled (up to 70%). 
D)  They have a high elastic modulus,which allows them to cushion stresses created by polymerization shrinkage or heavy occlusal loads.

Question 7

It is recommended to _____ to reduce sticking of the composite material to the placement instrument.

Accepted Answer

A)  use a little of an unfilled resin 
B)  use a little of the bonding agent 
C)  use a specially coated instrument 
D)  wet the composite instrument with alcohol 
A)  use a little of an unfilled resin 
B)  use a little of the bonding agent 
C)  use a specially coated instrument 
D)  wet the composite instrument with alcohol

Question 8

To avoid shrinkage,how should composite resins be placed into a preparation?

Accepted Answer

A)  In large increments 
B)  In small increments 
C)  The material does not shrink. 
A)  In large increments 
B)  In small increments 
C)  The material does not shrink.

Question 9

Some composite resin materials give off heat when cured.What is this called?

Accepted Answer

A)  Chemical reaction 
B)  Exothermic reaction 
C)  Thermal conductivity 
D)  None of the above 
A)  Chemical reaction 
B)  Exothermic reaction 
C)  Thermal conductivity 
D)  None of the above

Question 10

The use of two different restorative materials in the same restoration is referred to as what?

Accepted Answer

A)  Veneer technique 
B)  Hybrid technique 
C)  Layered technique 
D)  Sandwich technique 
A)  Veneer technique 
B)  Hybrid technique 
C)  Layered technique 
D)  Sandwich technique

Question 11

Match the items with the correct description below.
-Macrofilled composite

Accepted Answer

A) A light-cured,low-viscosity composite resin that contains fewer filler particles 
B) An early generation of composite that contained filler particles ranging from 10 to 100 mm in diameter 
C) A composite that contains all nano-sized fillers to enhance physical properties 
D) A composite that contains both macrofill and microfill particles 
E) A composite that contains very small filler particles averaging 0.04 mm in diameter 
A) A light-cured,low-viscosity composite resin that contains fewer filler particles 
B) An early generation of composite that contained filler particles ranging from 10 to 100 mm in diameter 
C) A composite that contains all nano-sized fillers to enhance physical properties 
D) A composite that contains both macrofill and microfill particles 
E) A composite that contains very small filler particles averaging 0.04 mm in diameter

Question 12

What is the possible outcome of repeated low-level exposure to the blue curing light?

Accepted Answer

A)  Cataract 
B)  Blindness 
C)  Detached retina 
D)  Macular degeneration 
A)  Cataract 
B)  Blindness 
C)  Detached retina 
D)  Macular degeneration

Question 13

Nanohybrids have a particle size of _____ microns (mm).

Accepted Answer

A)  0.1 to 0.4 
B)  310 to 100 
C)  0.03 to 0.5 
D)  0.005 to 0.020 
A)  0.1 to 0.4 
B)  310 to 100 
C)  0.03 to 0.5 
D)  0.005 to 0.020

Question 14

Match the items with the correct description below.
-Microfilled composite

Accepted Answer

A) A light-cured,low-viscosity composite resin that contains fewer filler particles 
B) An early generation of composite that contained filler particles ranging from 10 to 100 mm in diameter 
C) A composite that contains all nano-sized fillers to enhance physical properties 
D) A composite that contains both macrofill and microfill particles 
E) A composite that contains very small filler particles averaging 0.04 mm in diameter 
A) A light-cured,low-viscosity composite resin that contains fewer filler particles 
B) An early generation of composite that contained filler particles ranging from 10 to 100 mm in diameter 
C) A composite that contains all nano-sized fillers to enhance physical properties 
D) A composite that contains both macrofill and microfill particles 
E) A composite that contains very small filler particles averaging 0.04 mm in diameter

Question 15

Which of the following is an advantage of composite resin versus amalgam?

Accepted Answer

A)  Wear 
B)  Abrasion 
C)  Longevity 
D)  Thermal conductivity 
A)  Wear 
B)  Abrasion 
C)  Longevity 
D)  Thermal conductivity

Question 16

What type of restorative material is used for the atraumatic restorative treatment (ART)of caries?

Accepted Answer

A)  Compomer 
B)  Conventional composite resin 
C)  Hybrid (resin-modified)ionomer 
D)  High-viscosity glass ionomer composite 
A)  Compomer 
B)  Conventional composite resin 
C)  Hybrid (resin-modified)ionomer 
D)  High-viscosity glass ionomer composite

Question 17

Match the items with the correct description below.
-Flowable composite

Accepted Answer

A) A light-cured,low-viscosity composite resin that contains fewer filler particles 
B) An early generation of composite that contained filler particles ranging from 10 to 100 mm in diameter 
C) A composite that contains all nano-sized fillers to enhance physical properties 
D) A composite that contains both macrofill and microfill particles 
E) A composite that contains very small filler particles averaging 0.04 mm in diameter 
A) A light-cured,low-viscosity composite resin that contains fewer filler particles 
B) An early generation of composite that contained filler particles ranging from 10 to 100 mm in diameter 
C) A composite that contains all nano-sized fillers to enhance physical properties 
D) A composite that contains both macrofill and microfill particles 
E) A composite that contains very small filler particles averaging 0.04 mm in diameter

Question 18

The catalyst paste of a chemically cured composite resin contains _____ as an activator.

Accepted Answer

A)  dimethacrylate 
B)  a tertiary amine 
C)  benzoyl peroxide 
D)  camphoroquinone 
A)  dimethacrylate 
B)  a tertiary amine 
C)  benzoyl peroxide 
D)  camphoroquinone

Question 19

List the advantages and disadvantages of glass ionomer cements.

Accepted Answer

Advantages
•Chemically bond to enamel an

Question 20

In general,it is recommended that light-cured composite be placed in increments no thicker than ____ mm.

Accepted Answer

A)  1.0 
B)  2.0 
C)  4.0 
D)  8.0 
A)  1.0 
B)  2.0 
C)  4.0 
D)  8.0

What is the organic matrix of composite resins made up of?

In the polymerization process for composite resins,an activator causes an initiator molecule to form a _____ that breaks one of the carbon-to-carbon double bonds to form a single bond and another free radical.

Which of the following is correct regarding nanohybrid composite resins?

The fillers used in composite resins are:

Which of the following are advantages of laboratory-processed composite restorations over directly placed composites? 1)The restoration is denser. 2)The restoration polymerizes more completely. 3)More stress is created internally on the composite and the walls of the cavity preparation.

Which statement is correct about flowable composite resins?

It is recommended to _____ to reduce sticking of the composite material to the placement instrument.

To avoid shrinkage,how should composite resins be placed into a preparation?

Some composite resin materials give off heat when cured.What is this called?

The use of two different restorative materials in the same restoration is referred to as what?

Match the items with the correct description below. -Macrofilled composite

What is the possible outcome of repeated low-level exposure to the blue curing light?

Nanohybrids have a particle size of _____ microns (mm).

Match the items with the correct description below. -Microfilled composite

Which of the following is an advantage of composite resin versus amalgam?

What type of restorative material is used for the atraumatic restorative treatment (ART)of caries?

Match the items with the correct description below. -Flowable composite

The catalyst paste of a chemically cured composite resin contains _____ as an activator.

List the advantages and disadvantages of glass ionomer cements.

In general,it is recommended that light-cured composite be placed in increments no thicker than ____ mm.

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

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

Polymers for Prosthetic Dentistry

Provisional Restorations

Preventive and Corrective Oral Appliances

Filters

Exam 6: Composites, glass Ionomers, and Compomers

What is the organic matrix of composite resins made up of?

In the polymerization process for composite resins,an activator causes an initiator molecule to form a _____ that breaks one of the carbon-to-carbon double bonds to form a single bond and another free radical.

Which of the following is correct regarding nanohybrid composite resins?

The fillers used in composite resins are:

Which of the following are advantages of laboratory-processed composite restorations over directly placed composites? 1)The restoration is denser. 2)The restoration polymerizes more completely. 3)More stress is created internally on the composite and the walls of the cavity preparation.

Which statement is correct about flowable composite resins?

It is recommended to _____ to reduce sticking of the composite material to the placement instrument.

To avoid shrinkage,how should composite resins be placed into a preparation?

Some composite resin materials give off heat when cured.What is this called?

The use of two different restorative materials in the same restoration is referred to as what?

Match the items with the correct description below. -Macrofilled composite

What is the possible outcome of repeated low-level exposure to the blue curing light?

Nanohybrids have a particle size of _____ microns (mm).

Match the items with the correct description below. -Microfilled composite

Which of the following is an advantage of composite resin versus amalgam?

What type of restorative material is used for the atraumatic restorative treatment (ART)of caries?

Match the items with the correct description below. -Flowable composite

The catalyst paste of a chemically cured composite resin contains _____ as an activator.

List the advantages and disadvantages of glass ionomer cements.

In general,it is recommended that light-cured composite be placed in increments no thicker than ____ mm.

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

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

Polymers for Prosthetic Dentistry

Provisional Restorations

Preventive and Corrective Oral Appliances

Filters