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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 |