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Primary Impression
First reproduction of the hard and soft tissues of the mouth.
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Preliminary Impression
First negative reproduction for preparation of customized tray.
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Palatal Vault
Dome-like roof of the mouth.
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Colloid
A translucent, gelatinous substance used for Dental impressions.
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Irreversible Colloid
Unable to return to original state.
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Reversible Colloid
A final impression material, gel-like when heated, returning to a semi-solid when cooled.
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Alginate
Primary impression material, from salts of alginic acid, irreversible.
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Model
Positive reproduction of the hard and soft tissues of the mouth, usually of stone or plaster.
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Tuberosity
Projection of bone that serves a purpose.
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Modification
A change or alteration for better fit, adjustment.
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Evaluate
To rate or judge for accuracy.
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Opposing Arch
The teeth or jaw that occludes with the jaw being prepared.
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Evacuation
To remove by suction; Oral fluids, aspiration.
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Acrylic Resin
A transparent thermosetting plastic made with acrylic acid.
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Curing
The setting of certain materials to a permanent state.
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Silicone
A rubber base material that is less tacky used for final impressions.
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Polysulfide
A rubber base material, a pungent order, used for final impressions.
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Adhesive
A luting agent to hold two materials together.
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Double Mix
In Dentistry the use of two consistencies.
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Vibrate
In Dentistry, to shake or quiver to remove air bubbles from plaster or stone.
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Reproduction
A copy, likeness.
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Base
The principal substance of a mixture.
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Catalyst
Substance (enzyme) that begins a chemical reaction.
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Distort
To twist, bend or shrink out of shape.
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