Quiz 5 Flashcards
Which cement gives off an exothermic reaction and must be spatulated over a wide area on a cool, dry, thick glass slab?
Zinc phosphate
Zinc phosphate cement gives off an exothermic reaction and must be spatulated over a wide area to dissipate heat.
How should cement be placed into an indirect restoration for delivery?
Add a thin lining to cover all internal walls of the casting.
This ensures a good seal and prevents excess cement from spilling out.
Which statement regarding polycarboxylate cement is correct when compared to zinc phosphate cement?
It is less irritating to the pulp.
Polycarboxylate cement forms a chemical bond and is generally used for cast restorations.
Which type of glass ionomer cement is designed for cementation of indirect restorations?
Type I
Type I glass ionomer is used for cementation of metal restorations.
Which type of cement is preferred for cementation of ceramic veneers?
Composite resin
Composite resin cement is specifically designed for ceramic or porcelain restorations.
How should the tooth surface be prepared when using composite resin cement?
Etched or treated with a bonding system.
The tooth should be free of debris and moisture, not completely dry.
What could occur if excess cement is left at the cavosurface margin of a crown?
Irritate the area and cause inflammation.
Excess cement can lead to discomfort and inflammation if not removed.
Which item would not use luting cement for placement?
Direct provisional restorations.
ZOE cements are used for direct provisional restorations.
What is the dental assistant’s priority when preparing dental cements?
Follow the manufacturer’s instructions.
Each material has specific mixing times and methods.
Which factor in the cementation procedure is influenced by fluffing the powder in the bottle before dispensing?
Powder-to-liquid ratio.
Proper fluffing ensures consistent dispensing and consistency.
Which statement is incorrect regarding minimizing water loss through evaporation?
Dispense the liquid first and then powder.
Dispensing powder first helps to minimize water loss.
What step should be followed before dispensing cement powder?
Fluff and measure the powder.
Most cement powder should be fluffed before dispensing.
Which cement inhibits recurrent decay?
Glass ionomer.
Glass ionomer contains fluoride, which helps inhibit recurrent caries.
Which type of glass ionomer cement is used for pit and fissure sealants?
Type IV
Type IV is specifically designed for pit and fissure sealants.
How should glass ionomer cement be mixed to increase the working time?
On a glass slab.
Mixing on a glass slab increases the working time of glass ionomer.
Which factor is not an advantage of using glass ionomer in premeasured capsules?
Results can vary.
Premeasured capsules provide consistent results.
Which type(s) of cements can be light-cured?
Composite resin cement
Glass ionomer can also be light-cured, while ZOE and polycarboxylate are self-cured.
What type of cement is frequently used to cement ceramic inlays and onlays?
Composite resin cement.
Composite resin is used for final cementation of porcelain restorations.
Which method would not be used to remove excess cement from an indirect restoration?
Pull excess cement down away from the casting.
This method can stretch or weaken the material.
Properly mixed glass ionomer cement should have a(n) _____ appearance.
glossy.
A glossy appearance indicates proper mixing.
Which statement is incorrect as it relates to preparing a tooth for a composite restoration?
Dry the enamel and dentin completely.
Dentin should be slightly moist to avoid desiccation.
How should the interior of a porcelain crown be treated before cementation?
Roughened using air abrasion.
This prepares the surface for better adhesion.
The provisional restoration should be lined with which type of cements for temporary coverage?
Zinc oxide–eugenol cement.
Unreinforced type I ZOE is often used for temporary cementation.
How should polycarboxylate cement appear when mixed correctly?
Glossy.
A glossy appearance indicates proper mixing of polycarboxylate cement.
Which technique will help to dissipate heat when mixing zinc phosphate cement?
Mixing on a cool glass slab.
This technique helps to manage the exothermic reaction.
Which of the following is the correct cementing consistency for zinc phosphate cement?
Stringy, breaking about 1 inch from the slab.
This consistency indicates proper mixing.
Which cement is the most acidic and irritating to the pulp?
Zinc phosphate.
Zinc phosphate contains phosphoric acid, causing irritation.
Which cement(s) is (are) versatile and least irritating to the pulp? (Select all that apply.)
Zinc oxide–eugenol cement, Glass ionomer cement, Polycarboxylate cement
ZOE and glass ionomer are versatile and least irritating; polycarboxylate is also less irritating.
If used as a base, zinc phosphate requires the use of a liner first.
True.
Zinc phosphate is irritating to the pulp, necessitating a liner.
When ready for use, properly mixed polycarboxylate cement should appear:
glossy.
A glossy appearance indicates that polycarboxylate cement is mixed correctly.
If used as a base, zinc phosphate requires the use of a liner first. True or False?
True
Zinc phosphate is irritating to the pulp, necessitating a liner when used as a base.
When ready for use, properly mixed polycarboxylate cement should appear _______.
glossy
The zinc phosphate cement designed for the accurate seating of precision castings is _______.
type I
After mixing permanent cement, the spatula and glass slab should be _______.
cleaned immediately with a wet gauze sponge and disinfected
When you are preparing a crown for temporary cementation, you should _______.
place a thin film thickness on the inner surface of the crown
Zinc phosphate cement is used _______.
all of the options
When mixing zinc phosphate cement, a cool, dry slab will ________ the setting time.
increase
The cement that bonds directly with enamel, dentin, and metallic materials is _______.
glass ionomer
