Deck 45: Dental Cements

Question 1

Which factor(s)influence the cementation procedure?

A)Humidity
B)Temperature
C)Mixing time
D)All of the above

Answer 1

All of the above

Question 2

When working with dental cements,which statement is incorrect regarding minimizing water loss through evaporation?

A)Dispense powder first and then liquid.
B)Dispense the liquid first and then powder.
C)Dispense liquid when it is time to mix the cement.
D)Keep the lid on the liquid when not in use.

Answer 2

Dispense the liquid first and then powder.

Question 3

When are temporary cements used?

A)Cementing veneers
B)Placing a provisional crown
C)Cementing cast restorations
D)Restoring teeth

Answer 3

Placing a provisional crown

Question 4

How should glass ionomer cement be mixed to increase the working time?

A)Quickly
B)Slowly
C)On a glass slab
D)On a paper pad

Question 5

Which type of glass ionomer cement is used to cement orthodontic appliances?

A)I
B)II
C)III
D)I, II, or III

Question 6

Which type of dental cement is used as an adhesive for permanent indirect restorations?

A)Temporary
B)Luting
C)Provisional
D)Liner

Question 7

Which type of cement is preferred for cementation of ceramic veneers?

A)Zinc phosphate
B)Polycarboxylate
C)Glass ionomer
D)Composite resin

Question 8

Which cement that gives off an exothermic reaction and must be speculated over a wide area on a cool,dry,thick glass slab?

A)Zinc oxide eugenol
B)Polycarboxylate
C)Zinc phosphate
D)Composite resin

Question 9

Which statement best represents the dental assistant's priority when preparing dental cements?

A)Work quickly.
B)Mix in all powder at once.
C)Follow the manufacturer's instructions.
D)Change ratios depending on temperature.

Question 10

Which item listed would not use luting cement for placement?

A)Laminate veneers
B)Orthodontic fixed appliances
C)Direct provisional restorations
D)Indirect restorations

Question 11

When compared to zinc phosphate cement,which statement regarding polycarboxylate cement is correct?

A)It forms a mechanical bond to tooth structure.
B)It is generally used as temporary sedative cement.
C)It is less irritating to the pulp.
D)It is mixed on a glass slab.

Question 12

What would occur if there were a delay between mixing a luting material and placing the indirect restoration?

A)Decreased viscosity
B)Initial set begins
C)Improved thermal properties
D)Improved wettability

Question 13

How should cement be placed into an indirect restoration for delivery?

A)Fill casting until it is overflowing.
B)Add a thin lining to cover all internal walls of the casting.
C)Fill to the top margin of the crown.
D)Add a thin layer on the very bottom of the crown.

Question 14

How should dental cements be dispensed for mixing?

A)Dispense the liquid into the powder.
B)Dispense the powder first and then the liquid.
C)Dispense the material prior to beginning the procedure.
D)Dispense by hold the bottle of liquid at a 45-degree angle to ensure accurate drop size.

Question 15

Which factor is not an advantage of using glass ionomer in premeasured capsules?

A)Consistent results can be produced.
B)They can be triturated to eliminate mixing.
C)They are more convenient.
D)Results can vary.

Question 16

Which cement inhibits recurrent decay?

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

Question 17

What could occur if excess cement is left at the cavosurface margin of a crown?

A)Slowly dissolve, thus loosening the crown.
B)Irritate the area and cause inflammation.
C)Demineralize the enamel.
D)Create an occlusal prematurity.

Question 18

When composite resin cement is used,how should the tooth surface be prepared?

A)Free of all plaque and debris
B)Etched or treated with a bonding system
C)Sprayed with water before cementation
D)Both a and b

Question 19

Which type of glass ionomer cement is designed for restoring areas of erosion near the gingiva?

A)I
B)II
C)III
D)IV

Question 20

What step(s)should be followed before dispensing cement powder?

A)Pack the powder.
B)Fluff the powder.
C)Measure the powder.
D)Do both b and C

Question 21

What type of cement is frequently used to cement provisional crowns?

A)Type I ZOE
B)Type II ZOE
C)Composite resin
D)Glass ionomer

Question 22

Which type(s)of cements can be light-cured?

A)Composite resin
B)Glass ionomer
C)ZOE
D)Both a and b

Question 23

Which of the following is true regarding zinc phosphate cement?

A)Mix on a cool glass slab.
B)Add large increments of powder.
C)Spatulate over a small area of the slab.
D)Mix quickly.

Question 24

Properly mixed glass ionomer cement should have a glossy appearance.

Question 25

How should polycarboxylate cement appear once setting has initiated?

A)Stringy or weblike
B)Glossy
C)Powdery
D)All of the above

Question 26

How should the interior of a porcelain crown be treated before cementation?

A)Roughened using air abrasion
B)Cleaned with pumice
C)Moistened
D)Polished

Question 27

The provisional restoration should be lined with luting cement when being placed for temporary coverage.

A)True
B)False

Question 28

Which statement is incorrect as it relates to preparing a tooth for a composite restoration?

A)Rinse for 30 seconds.
B)Etch enamel and dentin for 15 seconds.
C)Dentin should be slightly moist.
D)Dry the enamel and dentin completely.

Question 29

If used as a base,zinc phosphate requires the use of a liner first.

Question 30

Which cement is the most acidic and irritating to the pulp?

A)Zinc phosphate
B)ZOE
C)Composite resin
D)Glass ionomer

Question 31

Which cement is versatile and the least irritating to the pulp? (Select all that apply.)

A)Zinc oxide eugenol cement
B)Glass ionomer cement
C)Composite resin cement
D)Zinc phosphate cement
E)Polycarboxylate cement

Question 32

Which method would not be used to remove excess cement from an indirect restoration?

A)Use an explorer.
B)Use a firm fulcrum.
C)Move instruments in a horizontal direction.
D)Pull excess cement down away from the casting.

Question 33

Which technique will help to dissipate heat when mixing zinc phosphate cement?

A)Mix on a cool glass slab.
B)Add large increments of powder.
C)Spatulate over a small area of the slab.
D)Mix quickly.