Which item is used to polish or trim custom trays, provisional coverage, dentures, and indirect restorations?
Dental Lathe
Which form of gypsum product is used for the creation of dies?
High-strength stone
Which of the following gypsum products has the lowest powder-to-water ratio?
High-strength stone
A model consists of the _____ portion, which represents the teeth and tissues of the mouth, and the _____ portion, which forms the base of the cast.
anatomic, art
A trimmed maxillary model will be _____ at the anterior portion, and the mandibular model will be _____ at the anterior portion.
pointed, rounded
When constructing ______ with a vacuum former, use a heavier-gauge, flexible plastic that does not require a spacer but does require an attachment for the strap.
a mouth guard
Which type of dental wax is often used to form a wall or box around a preliminary impression when it is poured up?
Boxing wax
Which type of wax is preformed with a thin sheet of aluminum foil between the layers?
Bite wafers
Which type of baseplate wax is softest?
I
Which methods are used to protect against biohazard contamination from impressions?
All answers are correct
Water should be running through a model trimmer
when trimming.
How will gypsum material be affected if additional powder is added after mixing has begun?
Weaker
How many milliliters of water should be mixed with 100 grams of high-strength dental stone?
19 to 24
A custom impression tray should fit and adapt well to the model and should maintain ____ mm of impression material between itself and the teeth.
3 to 4
Which of the following is/are to prevent a custom impression tray from sitting too deeply when taking impressions?
Spacer stops
The first step in making a custom tray is to
place blockout material to fill undercuts in the preliminary cast.
After fabrication, when can a self-cured resin custom tray be used?
After 24 hours
When would a light gauge, vacuum-formed resin material be used?
Bleaching trays & Provisional coverage
Light-cured resin can be used to make trays for which types of impressions?
All answers are correct
In minutes, how long should one wait before removing a model from an impression after pouring?
45 to 60
What should be done to an impression before pouring?
Use a gentle stream of air to remove excess moistur
Before constructing a light-cured tray, what would be painted on the model?
Separating medium
When constructing custom trays, it is best to remove excess material with a _______ after it has cured.
lab knife
What device holds maxillary and mandibular models in an occlusal relationship?
Articulator
What causes air bubbles in a model?
Improper pouring of the impression