Chapter 33 Dental Study Guide

Die stone can be used to fabricate a diagnostic cast if a very strong cast is needed.

• True

• False

Polymerization is the process by which the catalyst and accelerator used in elastomeric impression materials begin to cure.

• True

• False

Impressions are a negative mold of the tooth.

• True

• False

The acrylic resin used to fabricate vacuum-formed custom trays comes in which form?

• Paste

• Liquid and powder

• Putty

• Sheets

Which of the following gypsum products is the weakest?

• Plaster

• Die stone

• Orthodontic stone

• Lab stone

Thermoplastic means that the material becomes pliable when exposed to heat.

• shrinks

• becomes rigid

• enlarges

• becomes pliable

Which wax is a type of processing wax?

• Study wax

• Undercut wax

• Inlay wax

• Utility wax

Polysulfide impression materials have the fastest setting time of all of the elastomeric impression materials.

• True

• False

When maxillary and mandibular models are trimmed and in occlusion, the overall height should be

• 4

• 2

• 1.5

• 2

The warmer the water used in mixing a gypsum product, the

• slower

• firmer

• softer

• faster