Elsevier-Chapter 06: composites, Glass Ionomers, and Compomers

All of the following are reasons for incremental placement of composites except:

a. it allows adequate light penetration for depth of cure.

b. it eliminates polymerization shrinkage.

c. there is less curing time with smaller increments.

d. darker shades require more curing time with larger increments.

b. it eliminates polymerization shrinkage.

Your 2 o'clock patient is coming in for a class IV composite on tooth number 9. Which composite material would you not choose?

a. nanohybrid

b. macrofill

c. microfill

d. universal

b. macrofill

Resin-modified glass ionomer composites (RMGICs) are more esthetic-like composites but can recharge with fluoride ions in the oral cavity from toothpaste and water and re-release them. This allows for protection against recurrent decay.

a. Both statements are true.

b. Both statements are false.

c. The first statement is true; the second statement is false.

d. The first statement is false; the second statement is true.

a. Both statements are true.

The function of the silane coupling agent in composite resins is to:

a. give the composite strength.

b. bind the matrix to the filler.

c. reduce the oxygen-inhibited layer.

d. give the composite its shade.

b. bind the matrix to the filler.

The curing light in your office is broken, and you cannot get a loaner. Which type of composite could you still use?

a. Chemical cure

b. Dual cure

c. Light cure

d. None of the above

a. Chemical cure

Chemical cure composite resins are self-curing.

a. True

b. False

a. True

Curing lights should be checked with a radiometer.

a. True

b. False

a. True

Glass ionomers are not good insulators.

a. True

b. False

b. False

The patient does not need eye protection when using a curing light, as the light is in the patient's mouth.

a. True

b. False

b. False

The thin surface layer on polymerized (cured) composites, which contains unreacted monomers that allow for additional increments to be added, is called the:

a. hybrid layer.

b. oxygen-inhibited layer.

c. adhesive layer.

d. smear layer.

b. oxygen-inhibited layer.

Glass ionomers have greater radiopacity than dentin, making them identifiable on radiographs.

a. True

b. False

a. True

Direct composite restorations have less polymerization shrinkage than indirect composite restorations because they are molded directly to the tooth upon placement. Indirect composite restorations must be cemented for placement.

a. Both statements are true.

b. Both statements are false.

c. The first statement is true; the second statement is false.

d. The first statement is false; the second statement is true.

d. The first statement is false; the second statement is true.

Which of the following materials chemically bond to the tooth structure itself without a bonding agent?

a. nanohybrid resins

b. compomers

c. giomers

d. glass ionomers

d. glass ionomers

A class II, DO composite has been placed on #30. Which of the following areas should be cured after removing the matrix and prior to finishing/polishing?

a. Occlusal

b. Mesial

c. Distal buccal/lingual

d. If you cured the composite before taking the band off, you do not need to cure again.

c. Distal buccal/lingual

The delivery tip of flowable composite syringes can be thrown in the trash.

a. True

b. False

b. False

Sectional matrix bands come pre-formed and are for class II composites.

a. True

b. False

a. True

It is best to wait until the tooth is dry before selecting the shade of composite to be used.

a. True

b. False

b. False

All of the following are benefits of glass ionomer except:

a. fluoride release.

b. it does not require a bonding agent.

c. it chemically adheres to the tooth structure.

d. it has greater strength than a composite.

d. it has greater strength than a composite.

Which of the following restorations would be an ideal use for a compomer?

a. Class I restoration on #19

b. Class II restoration on #13

c. Class III restoration on #7

d. Class IV restoration on #8

c. Class III restoration on #7

Darker shades of composite require longer light curing times. Too much filler can make a composite resin difficult to work with.

a. Both statements are true.

b. Both statements are false.

c. The first statement is true; the second statement is false.

d. The first statement is false; the second statement is true.

a. Both statements are true.