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19 Cards in this Set
- Front
- Back
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What colour are VPS adhesive and what are they used with |
Polyvinyl siloxane and polyether impression materials |
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What colour are rubber base adhesive and what are they used with |
Brown and used with rubber base impression materials |
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What colour are silicone adhesives and what are they used with |
Orange - pink used with silicone impression materials |
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What is a gelatinous substance called |
Colloid |
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Which Impressions is a hydrocolloid used for |
Preliminary and Final |
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What are the two types of hydrocolloid |
Irreversible which is changed by chemical factors, and reversible which is changed by thermal factors |
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What are the 6 main components of alginate |
Potassium alginate calcium sulphate Trisodium phosphate diatomaceous earth zinc oxide potassium titanium fluoride |
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Prevent interference with the setting in the surface strength of the product used when making the model |
Potassium titanium fluoride |
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Adds bulk to the material |
Zinc oxide |
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A filler that adds bulk to to the material |
Diatomaceous earth |
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Added to slow down the reaction time for mixing |
Trisodium phosphate |
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Reacts with the potassium alginate to form the gel |
Calcium sulphate |
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Derived from seaweed, is used as a thickening agent, used in some ice creams |
Potassium alginate |
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What do hydrocolloid have difficulty with standing |
Tensile stress, tearing, and elastic strain, stretching. |
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What can a slight change in the surroundings do to an impression |
Cause dimensional change and distort |
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Alginate impression materials must be poured up within how long |
One hour of taking the impression |
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Absorption of water causing an object to swell |
Imbibition |
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Loss of water causing something to shrink |
Syneresis |
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How do you store an impression |
In a plastic biohazard bag covered with a slightly moistened towel |
