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28 Cards in this Set
- Front
- Back
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What are the two classifications of impression materials |
Chemical reaction Physical change reaction |
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What the chemical reaction of impression material (3) |
Form elastic rubbery materials Thermoset Chain lengthening/crosslinking |
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What is the physical change reaction in impression material (4) |
Soldification Gelation Thermoplastic Not as stable |
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What are the 3 types of impression material |
Inelastic Aqueous Non Aqueous |
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What are the types of Inelastic (3) |
Plaster Wax and Impression compound ZOE |
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What are the types of Aqueous Elasomeric Impression material |
Alginate (irreversible hydrocolloid) Agar (reversible hydrocolloid) |
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What are the types of Non Aqueous Elastomeric Impression Material (4) |
Polysulfides Polyether Silicone Rubber Vinylopolysiloxane |
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Which type of impression material is used primarily for edentulous patients |
Plaster |
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what type of material is made out of oil in cloves |
ZOE Zinc Oxide Eugenol |
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What was one of the first impression materials used in denistry |
Impression Wax |
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Explain Alginate Impression Material (3) |
Irreversible Contains Potassium Alginate Syneresis |
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Explain Agar Impression Material (3) |
Requires apparatus that maintains constant temp. Hysteresis Works well in wet enviroments |
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What was the first non aqueous material |
Polysulfide |
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How does the polysulfide impression material Polymerize What are two more characteristics of Polysulfide Impression Material |
Condensation Polymerization Smells Bad Longest working time of any elastomeric material |
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Which type of impression material has an unpleasant taste and is very accurate which led to additional silicones |
Polyether Impression material |
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Explain Addition Silicones (6) |
Most popular Clean with no taste or smell Most accurate Has fillers to achieve viscosities Automix gun Can be dispensed intraorally |
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What type of material is used with putty impression material |
High viscosity material |
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INFECTION CONTROL |
............. |
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Latex Allergies can develop from what |
Talc or Cornstartch |
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What is the most dangerous physical hazard |
Mercury Vapor |
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TAKING ALGINATE IMPRESSIONS |
............... |
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Describe alginate impressions |
Must extend beyond 2-3mm beyond the last tooth |
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Alginate impressions should have what type of consistency |
Peanut butter |
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Mandibular and Maxillary trays should be filled out |
Posterior to Facial |
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What position should you be in when doing the mandibular arch |
7:00 |
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What position should you be in when doing a maxillary impression |
11:00 |
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What does Syneresis mean |
Contraction of material and release of water |
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What does Hysteresis mean |
Ability to melt and Gel at differing temperatures |
