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WorksheetsDental Materials Week 13
Total questions: 22
Worksheet time: 14mins
Select the uses of dental cements.
pulpal protection
liner/base
enamel protection
luting
cementing two components together such as an indirect restoration cemented on or in a tooth, including inlays, crowns, bridges, veneers, orthodontic brackets and bands, and posts and pins
(a)
a thin layer of material placed to protect the tooth from the components of dental materials and microleakage, to stimulate reparative dentin, or to act as a pulp capping
low-strength base/liner
high-strength base/liner
a thick layer of cement used to protect the tooth from chemical and thermal irritation
low-strength base/liner
high-strength base/liner
less viscous, flowing easily; material of _______ consistency can be drawn out to a 1-inch string with a spatula lifted from the center of the mass, suitable for luting
primary
secondary
tertiary
thick, putty-like, condensable; material of ________ consistency can be rolled into a ball or rope, suitable for use as a base
primary
secondary
tertiary
_______ hydroxide is used as a low-strength base/liner in cavity preparations in which dentin no longer covers the pulp.
Calcium
Sodium
Potassium
Hydrogen
The strength of cement is controlled by the powder added to the liquid in the correct ratio.
true
false
(a) acts as a protective barrier between preparation and restoration. It decreases the sensitivity.
Cavity varnish has been largely replaced by (a) because they work better & are more effective.
(a) base/liners provide thermal insulation and support for restorations.
Cements used as bases are mixed to secondary consistency—a thick putty-like consistency that is condensable and can be rolled into a ball or rope.
The use of this dental cement: a root canal sealer or to place temporary crowns or bridges.
This cannot be used near a composite because it can interfere with curing & can cause softening of the resin
Zinc Oxide Eugenol
Zinc Phosphate
Zinc Polycarboxylate
Resin-Based
Cement has an added effect to desensitize the pulp- has a scent of clove
obtundant effect
abundant effect
desensitizing effect
This is the oldest cement. The properties are powder and liquid. It is used for cementing ortho bands together.
Zinc Oxide Eugenol
Zinc Phosphate
Zinc Polycarboxylate
Resin-Based
This dental cement has a secondary consistency. Its properties include powder and liquid form. "Durelon"
It is used for the final cementation of a crown, bridge, inlay, onlay, or ortho bands.
Zinc Oxide Eugenol
Zinc Phosphate
Zinc Polycarboxylate
Resin-Based
This dental cement has a secondary consistency. Its properties include powder and liquid form. "Rely-X"
Its uses are for veneers, ortho, endo, and it is very common in cosmetic dentistry.
Zinc Oxide Eugenol
Zinc Phosphate
Zinc Polycarboxylate
Resin-Based
Most provisional restorations are in place for up to ____ weeks.
1 to 2
2 to 4
4 to 6
8 to 12
Provisional materials include metals, polycarbonate, ______, composites, and cements.
acrylics
diamond
glass ionomer
1. Customized crowns are more versatile and more consistently meet the criteria for successful provisional restorations.
2. Preformed crowns have the advantage of convenience, in that they are already pre-made in a variety of sizes and anatomic forms.
first statement true, second false
first statement false, second true
both true
both false
Metal crowns are generally used only in 1. ______ teeth, with polycarbonate forms used on 2. _______ teeth.
1. posterior 2. anterior
1. anterior 2. posterior
The (a) crown is the most durable of the preformed crowns, providing provisional coverage lasting months and even years
Intracoronal provisionals are used to close endo access.
true
false
