Dental Materials Test #1

A model consists of the __ portion (teeth and tissues) and the ___ portion (the base of the cast).

What does the term syneresis mean as it relates to alginate impressions?

What device holds maxillary and mandibular models in an occlusal relationship?

What causes air bubbles in a model?

In minutes, how long should one wait before removing a model from an impression after pouring?

Which impression material is used when an extremely accurate final impression is essential?

Which type of impression tray covers only half of a dental arch?

How should a plaster mix NOT be manipulated?

An impression is a positive reproduction of the teeth. The model created from the impression is a negative reproduction.

How is an alginate impression disinfected?

Which statement regarding infection control in the dental laboratory is accurate?

What type of impression tray is required with reverisble hydrocolloid?

Elastomeric materials use an Automix system. The extruder gun insert is either catalyst or base.

Which technique listed would be incorrect when pouring an impression?

What term is used when an alginate impression takes up water either form soaking or wrapping in a wet paper towel?

Which impression is taken to produce a reproduction of the occlusal relationship of the teeth in centric occlusion?

How will a water temperature of 80 degrees affect an algiante mix?

Which type of elastomeric material has the highest viscosity?

Which instructions would be given to a patient obtaining a bite registration?

How are alginate impressions removed from the mouth?

Of the materials listed, which one is used most commonly for custom provisional coverage?

When assisting a dentist in taking an elastomeric impression, mix the light-bodied material first.

The first step in making a custom tray is to:

Which item is used to polish or trim custom trays, provisional coverage, dentures, and indirect restorations?

What is the most common type of provisional coverage used for crown and bridge preparations?

The two types of provisional coverage include ___ and ___ .

Which cement is most commonly used with provisional crowns?

Which provisional, preformed crowns are used on anterior teeth, when appearance is important?

What can be done to alleviate the gag reflex when taking alginate impressions?

Which of the following is an acceptable method for altering the setting time of alginate impression material?

When would a light gauge, vacuum-formed resin material be used?

Which type of wax is performed with a thin sheet of aluminum foil between the layers?

Which irreversible hydrocolloid material is used most widely for preliminary impressions?

What are preliminary impressions used to make?

Which form of gypsum products is used for the creation of dies?

Which type of dental wax is used to construct occlusal rims and set denture teeth in the wax-up?

Which portion of the maxillary impression tray should be seated in the mouth first?

What instructions are given regarding home care instructions for a patient with provisional coverage?

Alginate impressions must be poured up within ___ so that distortion does not occur.

Which material is commonly used when taking a bite registration?