Chapter 33 Study Guide Quiz

The process of placing wax around the borders of a tray used for alginate impressions is called

• waxing

• beading

• rim locking

• luting

Preformed temporary metal crowns are made of steel.

• True

• False

What is the purpose of calcinating raw gypsum?

• To add water

• To remove water

• To add air

• To remove excess air

Polysulfide is available in more forms than silicone.

• True

• False

Sticky wax is used to form a wax box around an impression prior to pouring it with gypsum.

• True

• False

What should the operator do next after the bitefork is inserted into the patient's mouth?

• Loosen the release screws

• Tighten the finger screws

• Secure the facebow to the bitefork

• Disinfect the facebow

When taking alginate impressions, it is best to take the maxillary impression first.

• True

• False

Elastomeric impression materials are commonly used for removable prosthetics.

• True

• False

After a custom self-curing acrylic tray has been made, it should be allowed to set for use.

• 10 minutes

• 1 hour

• 24 hours

• 12 hours

Before trimming plaster models, dry models should be soaked in water for

• 2 minutes

• 10 minutes

• 5 minutes

• 24 hours