Chapter 47 Laboratory Materials and Procedures

Which of the following gypsum products has the lowest powder-to-water ratio?

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

How many milliliters of water should be mixed with 100 grams of high-strength dental stone?

Vacuum former conforms sheets of ___resin material to a diagnostic model

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

How should a plaster mix NOT be manipulated?

Which type of dental wax is used to form a wall/box around preliminary impressions when poured

Custom impression tray should maintain __mm of impression material between itself and the teeth

Which statement is incorrect regarding safety precautions in the laboratory?

What should be done to an impression before pouring?

When constructing custom trays, it is best to remove excess material with a __after cured

Trimmed maxillary model will be __at the anterior, mandibular model will be __at the anterior

Which technique listed would be incorrect when pouring and impression?

Which item is used to polish or trim custom trays?

How should the patient bite when positioning the bite-fork during a face-bow registration?

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

A model consists of the __portion, representing the teeth, and the __portion, forms the base

__is the measurement of where the teeth are positioned when joints align before coming together

Which type of baseplate wax is the softest?

How should light-cured resin tray material be cured?

Which form a gypsum product is used for the creation of dies?

An advantage of having lab equipment and trained personnel in the dental office is?

The vertical indicator rod should be aligned with which oral landmark when taking a face-bow

The first step in making a custom tray is to ?

After fabrication, when can a self-cured resin custom tray be used?

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

Light-cured resin can be used to make trays for which types of impressions?

How will gypsum material be affected if additional powder is added after mixing has begun?

__is/are used to prevent a custom impression tray from sitting too deep when taking impressions

What causes air bubbles in a model?

Before constructing a light-cured tray, what would be painted on the model?

What type of wax is preformed with a thin sheet of aluminum foil between the layers?

When construction __with a vacuum former, use a heavier-gauge plastic

Water should be running through a model trimmer