Deck 7: Cements

Question 1

Which of the following cements is oil based?

A) Zinc phosphate
B) Calcium hydroxide
C) Zinc oxide-eugenol
D) Zinc polycarboxylate
E) Glass ionomer

Answer 1

Zinc oxide-eugenol

Question 2

The mixing time for glass ionomer cement should be:

A) 10 to 20 seconds.
B) 20 to 30 seconds.
C) 30 to 60 seconds.
D) 2 minutes.
E) 7 minutes.

Answer 2

30 to 60 seconds.

Question 3

Which type of cement has a powder composed of aluminosilicate glass?

A) Zinc polycarboxylate
B) Zinc oxide-eugenol
C) Zinc phosphate
D) Glass ionomer

Answer 3

Glass ionomer

Question 4

Which of the following high-strength bases has the highest modulus of elasticity?

A) Glass ionomer
B) Resin modified glass ionomer
C) Zinc phosphate
D) Zinc polycarboxylate

Question 5

The hybrid ionomer cement liquid should be dispensed by holding the vial _____ to the mixing pad.The cement is applied to a _____ tooth.

A) at an angle; dry
B) at an angle; slightly moist
C) vertically; dry
D) vertically; slightly moist

Question 6

The purpose of cooling the glass mixing slab when mixing glass ionomer cement is to:

A) incorporate water into the mix.
B) slow the setting reaction.
C) accelerate the setting reaction.
D) allow more powder to be incorporated into the liquid.

Question 7

Which type of cement for final cementation has the highest compressive strength?

A) Compomer
B) Hybrid ionomer
C) Glass ionomer
D) Zinc phosphate
E) Zinc polycarboxylate

Question 8

Which solvent is useful for removal of set zinc oxide-eugenol cement?

A) Ether
B) Orange oil
C) Ethyl alcohol
D) Turpentine
E) Water

Question 9

Which of the following statements is true of hybrid ionomer cements?

A) They are oil-based cements.
B) They are recommended for cementation of lower-strength all-ceramic inlays, onlays, or crowns.
C) They may be used for cementation of zirconia-based all-ceramic crowns and bridges.
D) They are resin-modified zinc polycarboxylate cements.

Question 10

Which type of cement is composed of dimethacrylate resin and glass filler?

A) Zinc polycarboxylate
B) Zinc phosphate
C) Zinc oxide-eugenol
D) Esthetic resin
E) Glass ionomer

Question 11

Effective thermal protection requires that a base be at least _____ mm thick.

A) 0.05
B) 0.5
C) 1.5
D) 5

Question 12

Which of the following cements has a sedative effect on the pulp?

A) Glass ionomer
B) Zinc phosphate
C) Zinc polycarboxylate
D) Calcium hydroxide
E) Zinc oxide-eugenol

Question 13

Which of the following statements is(are)true of zinc polycarboxylate cement?

A) It is stronger than zinc phosphate cement.
B) It is more irritating to the pulp than zinc phosphate cement.
C) It is less irritating to the pulp than zinc phosphate cement.
D) A and B are both true.
E) A and C are both true.

Question 14

Which of the following is oil-based cement?

A) Glass ionomer
B) Hybrid ionomer
C) Zinc polycarboxylate
D) Zinc oxide-eugenol

Question 15

Which of the following is strong cement that may be used for permanent restorations such as crowns and bridges?

A) Calcium hydroxide
B) Varnish
C) Zinc polycarboxylate
D) Unreinforced zinc oxide-eugenol
E) Unreinforced zinc oxide-noneugenol

Question 16

Which of the following statements is(are)true of glass ionomer cements?

A) Fluoride may be added to the powder for an anticariogenic effect.
B) A calcium hydroxide base is not recommended when glass ionomer cement is used in a deep cavity.
C) Some retention is gained through chemical bonding as well as mechanical bonding.
D) A, B, and C are all true statements.
E) A and C are both true statements.

Question 17

The maximum working time for zinc polycarboxylate cement is _____ seconds.

A) 30
B) 60
C) 90
D) 120

Question 18

Which of the following statements is true of the manipulation of zinc polycarboxylate cement?

A) The liquid is added to the powder.
B) The mixing time is about 3 minutes.
C) The cement should be mixed over a large area of the mixing surface.
D) The proper consistency is creamy.

Question 19

Compomer cement is indicated for cementation of which of the following types of restorations?

A) Ceramic-metal crowns
B) Traditional all-ceramic crowns
C) Traditional all-ceramic inlays
D) A, B, and C
E) A and C

Question 20

Cements are generally hard,brittle materials formed when a powdered _____ is mixed with a liquid.

A) monomer
B) acrylic resin
C) oxide or glass
D) quartz

Question 21

Self-adhesive resin cements eliminate the need for primer and bond.They are as strong as adhesive resin cements.

A) Statement 1 is correct; statement 2 is correct.
B) Statement 1 is incorrect; statement 2 is correct.
C) Statement 1 is correct; statement 2 is incorrect.
D) Statement 1 is incorrect; statement 2 is incorrect.

Question 22

Which of the following cements is used most frequently as a temporary filling?

A) Zinc phosphate
B) Glass ionomer
C) Zinc oxide-eugenol
D) Zinc polycarboxylate
E) Compomer

Question 23

Esthetic resin cements are used to:

A) bond metal restorations.
B) bond ceramic restorations.
C) bond orthodontic brackets.
D) fill root canals.

Question 24

The cement closest to glass ionomer in compressive and tensile strength is:

A) zinc polycarboxylate.
B) zinc oxide-eugenol.
C) hybrid ionomer.
D) adhesive resin.

Question 25

Cavity liners and varnishes:

A) function as a protective barrier between dentin and the restorative material.
B) protect the pulp from the high pH of calcium hydroxide.
C) minimize the ingress of oral fluids at the restoration-tooth interface.
D) do A, B, and C.
E) do A and C.

Question 26

Which materials may be used as a base for composites but not with traditional ceramics?

A) Compomer
B) Glass ionomer
C) Hybrid ionomer
D) A, B, and C
E) A and C

Question 27

Orthodontic bands may be cemented with which of the following cement(s)?

A) Glass ionomer
B) Zinc phosphate
C) Zinc oxide-eugenol
D) A and C
E) B and C

Question 28

Which of the following materials used as bases is supplied as a single-paste compule that does not require mixing?

A) Zinc phosphate
B) Zinc polycarboxylate
C) Compomer
D) Glass ionomer
E) Hybrid ionomer

Question 29

Zinc oxide-eugenol cement is a single paste system.Zinc oxide-eugenol cements should be mixed with a plastic spatula.

A) Statement 1 is correct; statement 2 is correct.
B) Statement 1 is incorrect; statement 2 is correct.
C) Statement 1 is correct; statement 2 is incorrect.
D) Statement 1 is incorrect; statement 2 is incorrect.

Question 30

Direct and indirect bonding of orthodontic brackets is accomplished primarily with the use of _____ cements.

A) calcium hydroxide
B) glass ionomer
C) zinc phosphate
D) resin
E) compomer

Question 31

Properties of zinc polycarboxylate cement include:

A) high viscosity.
B) moderate strength.
C) mild acidity.
D) all of the above.
E) only B and C.

Question 32

Cavity varnishes are applied in order to:

A) insulate the pulp from deep or large restorations.
B) reduce leakage around margins and walls of the restoration-tooth interface.
C) stimulate the formation of reparative dentin.
D) function as a therapeutic base.

Question 33

Histologic reactions to zinc polycarboxylate cement are similar to:

A) zinc oxide-eugenol.
B) resin-modified ionomer.
C) glass ionomer.
D) zinc phosphate.

Question 34

Adhesive resin cement would not be used in the cementation of:

A) metal ceramic crown.
B) alloys.
C) indirect esthetic restoration.
D) all of the above.
E) A and B only.

Question 35

Which of the following cements is used for pulp capping?

A) Zinc phosphate
B) Zinc oxide-eugenol
C) Zinc polycarboxylate
D) Calcium hydroxide
E) Glass ionomer

Question 36

The main function of dental cements is to:

A) retain restorations on prepared teeth.
B) insulate the pulp.
C) reinforce missing tooth structure.
D) initiate formation of reparative dentin.

Question 37

Hybrid ionomer cements:

A) are used to cement core buildups.
B) are used to cement all ceramic restorations.
C) bond orthodontic appliances.
D) are all of the above.

Question 38

Which of the following cements is used in order to stimulate the formation of reparative dentin?

A) Zinc phosphate
B) Zinc polycarboxylate
C) Calcium hydroxide
D) Zinc oxide-eugenol
E) Hybrid ionomer

Question 39

Rosin,29%,is added to Type I zinc oxide-eugenol cement powder to:

A) reduce brittleness.
B) accelerate set.
C) act as a sedative.
D) do only A and C

Question 40

Which of the following is not a water-based cement?

A) Glass ionomer
B) Zinc oxide-eugenol
C) Zinc polycarboxylate
D) Hybrid ionomer

Question 41

Temporary resin cements eliminate the problem of:

A) needing a bonding agent.
B) potential contamination by zinc oxide-eugenol cement.
C) needing a glass ionomer.
D) needing a resin cement.

Question 42

Orthodontic bands are cemented using:

A) glass ionomer cement.
B) resin-modified cement.
C) zinc oxide-eugenol cement.
D) calcium hydroxide.