Elsevier-Chapter 09: Dental Ceramics

Base metals require more porcelain layers to cover the dark color.

a. True

b. False

a. True

There is no final impression needed for CAD/CAM restorations. The final restoration can be viewed in 3D to make any adjustments before milling, which can eliminate most errors.

a. Both statements are true.

b. Both statements are false.

c. The first statement is true; the second statement is false.

d. The first statement is false; the second statement is true.

d. The first statement is false; the second statement is true.

All of the following can cause porcelain/ceramic failure except:

a. occlusal loading.

b. opposing gold restoration.

c. ultrasonic instrumentation.

d. inadequate oxide layer at the interface of the porcelain and metal.

b. opposing gold restoration.

It doesn't matter if you do not go through all of the abrasives when polishing ceramics, only that you achieve the desired luster.

a. True

b. False

b. False

Veneers can be used on premolars to give the appearance of correct alignment.

a. True

b. False

a. True

The material you should choose when cementing a lithium disilicate or leucite-reinforced ceramic crown is:

a. zinc oxide eugenol.

b. resin cement.

c. zinc phosphate.

d. glass ionomer.

b. resin cement.

Your patient wants a ceramic crown on #9. Which one would not be an option for this patient?

a. Leucite-reinforced ceramics

b. Lithium disilicate

c. Zirconia

d. None of the above

c. Zirconia

Zirconia restorations can be cemented with glass ionomer cements.

a. True

b. False

a. True

The ability of ceramics to resist compressive forces is more important than the ability to resist flexural forces.

a. True

b. False

b. False

Porcelain is fused to metal by which of the following?

a. Oxygen-inhibited layer

b. Hybrid layer

c. Mechanical bonding

d. Chemical bonding with oxides

d. Chemical bonding with oxides

The changing of porcelain from a powder to a solid mass is called:

a. annealing.

b. sintering.

c. addition polymerization.

d. etching.

b. sintering.

The ceramic processing technique in which ceramic powder is mixed with a water-based liquid to form a slip and pressed onto a porous refractory die is called:

a. slip casting.

b. lost wax casting.

c. sintering.

d. heat pressing.

a. slip casting.

You should have your patients remove lipstick before taking a shade. Use the operatory chair light to ensure the correct shade.

a. Both statements are true.

b. Both statements are false.

c. The first statement is true; the second statement is false.

d. The first statement is false; the second statement is true.

c. The first statement is true; the second statement is false.

Your patient is coming in for a three-unit bridge on #5-7 and has a problem with bruxism. Which of the following materials would you use?

a. Porcelain

b. Leucite-reinforced ceramic

c. Zirconia

d. Lithium disilicate

c. Zirconia