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29 Cards in this Set
- Front
- Back
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A gelatinous material used to obtain impressions |
Colloid |
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Loss of water, causing shrinkage |
Syneresis |
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To bring a material to a desired temperature and consistency |
Tempering |
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A property of fluids with a high resistance to flow |
Viscous |
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material of choice in the dentistry for preliminary impressions |
Alginate |
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To transform a material from one physical state to another |
Hysteresis |
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Means water |
Hydro |
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A reproduction of someones bite with the use of wax or elastomeric material |
Occlusal Registraion |
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A substance that modifies or increases the rate of a chemical reaction |
Catalyst |
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Absorption of water, causing an object to swell |
Imbibition |
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What type of tray allows impression material to mechanically lock on |
Perforated |
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The organic substance of hydrocolloid material is |
Seaweed |
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Elastomeric materials would be selected for what types of impressions |
Final |
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Another name for Polysulfide |
Rubber Base |
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What impression material would you select to take a preliminary impression |
Alginate (Irreversible Hydrocolloid) |
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What type of tray would you select for a preliminary impression |
Perforated Tray |
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The maximum time allowed for mixing the alginate, loading the tray, and positioning the tray in the patient's mouth |
Working Time |
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The time from the start of the mix until the material has set |
Setting Time |
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Increases the setting time |
Cold Water |
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Reduces or shortens the setting time |
Warm Water |
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Covers one half of the arch |
Quadrant Tray |
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Covers the anterior portion of the arch |
Section Tray |
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Covers the entire arch |
Full-Arch Tray |
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Depth to allow ________ mm of material between the tray and incisal or occlusal edges of the teeth. |
2 to 3 |
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What is the shelf life of Alginate |
1 Year |
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What are the required structures on a maxillary impression? |
Hard Palate Tuberosities Vestibular Areas |
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What are the required structures on a mandibular impression? |
Retromolar Pad Lingual Frenum Tongue Space Mylohyoid Ridge Vestibular Areas |
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What is mouth wash used for? |
Clean Debris Before Impressions |
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What materials can be used for a bite registration? |
Baseplate Wax Polysiloxane Zinc Oxide-Eugenol (ZOE) |
