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dent mat 2
impression materials
Question | Answer |
---|---|
Types of Impression materials | inelasticelasticelastomers |
Uses of Inelastic materials | edentulous impressionsbite registrations |
Typesof Inelastic Impression materials | impression plastercompoundZOE |
Physical changes of Compound Impression Materials | compound water bathbunsen burner |
uses of ZOE as an impression material | secondary impression for denturesbite registration |
Types of elastic impression material | hydrocolloidselastomers |
Types of Hydrocolloids | reversible and irreversible |
types of elastomers | polysulfide, condesation silicone, polyethers, olyvinylsiloxane |
uses of reversible hydrocolloids | final impression crown and bridge |
Chemical reactions of reversible hydrocolloid | physical change sol----> gel by heat |
Composition of Reversible hydrocolloid: Agar | sol to gel |
Composition of Reversible hydrocolloid:Borax | strength |
Composition of Reversible hydrocolloid:potassium sulfate | setting of gypsum |
Composition of Reversible hydrocolloid:benzoates | preservative |
Composition of Reversible hydrocolloid:additive water | to balance |
Advantages of Reversible Hydrocolloids | CostUsable in a wet environmenet |
Disadvantages to a reversible hydrocolloid | suneresisimbibitioncross contaminations |
Uses of polysulfides | final impression crown and bridgefinal impression dentures |
Chemical Reaction of Polysulfides | polymerization |
Uses of condensation silicone | final impression crown and bridgefinal impression denture |
Chemical Reaction of Codensation silicone | polymerization |
Uses of polyvinylsiloxane | final impression crown and bridgefinal impression denturebite registration |
Chemical Reaction of Polyvinylsiloxane | polymerization |
uses of polyethers | final impression crown and bridgefinal impression denturebite registration |
Chemical reaction of polyethers | polymerization |