Question 1

Cavity liners and varnishes:

Accepted Answer

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 2

Hybrid ionomer cements:

Accepted Answer

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 3

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

Accepted Answer

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

Question 4

Which of the following is oil-based cement?

Accepted Answer

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

Question 5

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

Accepted Answer

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

Question 6

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

Accepted Answer

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

Question 7

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

Accepted Answer

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 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

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 12

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

Accepted Answer

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

Question 13

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

Accepted Answer

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 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

Histologic reactions to zinc polycarboxylate cement are similar to:

Accepted Answer

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

Question 17

The mixing time for glass ionomer cement should be:

Accepted Answer

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

Question 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

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

Question 20

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

Accepted Answer

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.

Exam 7: Cements