Custom Trays
The first step in making a custom tray is to
Place blockout material to fill undercuts
This piece of equipment sprays sand to create etching or pitting
Sandblaster
Dental models are also referred to as a ___________
Study cast
Which type of gypsum product is Type III
Dental Stone
Dental waxes can be made from __________ or _____________ products.
natural or synthetic
After how long, when can a self-cured resin custom tray be used?
24 hours
This holds models in position to aid in reproduction of the bite
Articulator
Should plaster be poured in the impression in large or small amounts.
small
Is paraffin wax derived from animals, plants, or minerals?
minerals
Which of the following is/are used to prevent a custom impression tray from sitting too deeply when taking the impression?
Spacer stops
This is used to trim and polish custom trays, provisional coverage, dentures, and indirect restorations
Dental Lathe
In minutes, how long should one wait before removing a model from an impression after pouring?
45 to 60
How will gypsum material be affected if additional powder is added after mixing has begun?
It will be weaker
Which type of dental wax is often used to form a wall or box around a preliminary impression when it is poured up?
Boxing
A custom impression tray should maintain ____ mm of impression material between itself and the teeth.
3 to 4
This determines the positional relationships of the maxillary arch to the temporomandibular joints.
Face bow
What is an advantage of a digital model?
Little physical space to store, easily accessible, easily duplicated, cannot be misplaced, unbreakable
Which of the gypsum products has the lowest powder-to-water ratio?
High strength stone
Which type of baseplate wax is softest?
Type I
How long should light-cured resin tray material be cured?
2 minutes
This is used to construct custom trays for bleaching and mouth guards
Vacuum former
What are the two parts of the dental model - be in depth what do they include?
Anatomic and art portion - Anatomic made from the alginate impression and includes teeth, gingiva, and details. The art portion is the base of the cast.
Which form of gypsum product is used for the creation of dies?
High strength/die
What are the three general classifications of waxes?
pattern, processing, and impression