Classification of Impressions
Irreversible Hydrocolloid
Reversible Hydrocolloid
Elastomeric Materials
Occlusal Registration
100
The three classifications of impressions taken in dental procedures consist of
What is preliminary, final, and occlusal
100
What is the irreversibly hydrocolloid most widely used for preliminary impressions
What is alginate
100
Term used to describe change in temperate that causes the reversible material to transform from one physical state to another
What is hysteresis
100
"Having rubber like qualities"
What is elastomeric
100
Most often referred to as the bite registration
What is occlusal registration
200
Impressions are a _ reproduction of those structures, and the model created from the impression is the positive reproduction of the structures.
What is negative
200
What 2 phases does hydrocolloid materials have
What is sol (solution) and gel (solid)
200
Reversible material is made up approximately 85 percent water and 13 percent__?
What is algar
200
Elastomeric materials are self-curing and supplied as a base and a ___
What is catalyst
200
The paste has no odor or taste for the patient
What is polysiloxane bite registration paste
300
Impressions are two basic types:
What is stock trays and custom trays
300
A slight change in the surroundings can distort the impression and can cause
What is dimensional change
300
An organic substance derived from seaweed
What is agar
300
The ability to flow into and around the details of the prepared tooth
What is Light-bodied material/syringe-type or wash-type
300
Material that is odor free, non-staining, and relatively easy to mix
What is condensation silicone
400
Stock trays should extend approximately ___ beyond the third molar, retromolar, or tuberosity area of the arch.
What is 2 -3 mm
400
Room temperature of __ is best when mixing alginate
What is 70 degrees
400
Reversible hydrocolloid material is placed in
What is plastic tubes
400
The stage in which the appearance of elasticity and proceeds through a gradual change to a solid, rubbery mass
What is final set
400
Has little to no resistance to bite closure and is a fast setting material
What is zinc oxide- eugenol (ZOE)
500
What is used if the patient has an unusual high palate when trying to get an impression
What is utility wax
500
What is the water-to-powder ration on an adult mandibular impression
What is 2:2
500
The syringe material is liquefied by placing it in __ degree storage bath as the tray material
150
500
Have high dimensional stability and low tear resistance, making them easy to handle when making a final impression
What is Polysiloxane
500
The base of silicone impression material
What is polydimethyl siloxane
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