Chapter 16: Gypsum and Wax Products Flashcards
Hard replicas of hard and soft tissue of the patient’s oral cavity, made from gypsum products; also referred to as models
Casts
Casts generally made from dental plaster or stone and used for patient ed, treatment planning, and tracking the progress of treatment, as with orthodontic models; these casts are also known as study models
Diagnostic Casts
Cast generally made from one of the dental stones that are strong enough to resist the stresses of fabricating an indirect restoration or prosthesis
Working casts
Replicas of the prepared teeth that are generally removable from the working cast
Dies
The weakest, most porous form of gypsum product used in dentistry
Model plaster
A stronger, less porous form of gypsum product used in dentistry
Dental stone
The densest form of gypsum product used in dentistry
Die stone
Refers to the process of vibrating the flowable gypsum product into an impression; this process must produce a cast that is an exact replica of the impression.
Pouring
The process of removing excess hardened gypsum from the cast for ease in working with the cast and appearance in presentation
Trimming
A range of melting points of the individual components of wax
Melting range
The movement of wax as it approaches the melting range
Flow
A wax film that remains on an object after the wax is removed
Excess residue
A duplicate of a restoration carved in wax
Wax pattern
A way of fabricating a metal restoration by encasing the wax pattern in stone and then vaporizing the wax under high temperatures to leave an empty impression space once occupied by the wax; molten metal is then cast into the space and takes the shape of the pattern
Lost wax technique
