impression Materials Elastic- dr. Sumit Goel - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Three types of impression materials were investigated: polyether, addition cure and condensation cure silicones. Condensation cured silicones can be used in either a single-stage impression technique or a two-stage technique. Condensation silicone impression material: Chemical composition: The material is supplied as a base and an accelerator in a low consistency and putty-like consistency. The base is composed of a linear silicone called polydimethylsiloxane and fillers (either calcium carbonate or silica). Condensation Silicone Impression Material. The condensation silicones have a different level of density and setting than the addition silicones, so the two-step technique must be used. ppt. Define silicone rubber impression material. Fast removal Slow removal IMPRESSION MATERIALS Distortion related to setting reaction. Stomaflex represents group of reliable materials intended for everyday use in your dental office. Impression materials. Addition silicone impression material (group 8-b) youtube. Chemically there are 4 kinds ; 1) polysulphid ; 2) Condensation polymerizing silicone ; 3) Additional polymerizing silicone ; 4) Polyether ; 28 1- Polysulphide rubber impression materials. This innovative system compound of classical Putty and low-viscosity Light material offers more accurately detail reproduction, comfortable handling and very high tolerance to the moisture. lecture for undergraduate dental students who r eyeing for a comprehensive knowledge regarding elastomers SILECT ® – Premium condensation-curing silicone. Addition silicone impression material (group 8-b) youtube. Their colors, in addition to making it easy to identify each product, create an excellent color … Product benefits. Silicone by addition. These are condensation and addition silicone. materials viz., polysulfide, condensation silicone, addition silicone and polyether. Silicone, being a more elastic material, allows for more uses for dentists than alginate. The high surface tension of about 50 mJ/m 2 for the base and of 38 mJ/m 2 for the accelerator of a polyether system is caused by polar carbonyl and ether groups, respectively. Our silicones, available in different hardnesses and consistencies, adapt to different impression techniques: double impression (putty/wash), sandwich and single-phase. Elastic Impression Materials and Denture Adhesives – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 70f57a-OTViM They are silicones designed for the impression of fixed prosthesis by its high density after the polymerization.. Silicone impression material The silicone impression materials are classified according to the type of chemical reaction by which they set. This grants us the ability to pour extra models as needed for a number of months after we take the impressions, streamlining making occlusal appliances or performing a diagnostic equilibration. Polyethers Condensation silicone Addition silicone Impression materials of choice for Implants Polyether - Being hydrophilic in nature, this is the material of choice for implant impressions. Find many great new & used options and get the best deals for COLTENE Speedex Putty (Condensation Silicon) Rubber Base Impression Material. at the best online … The purpose of this article is to review impression materials used for fabricating fixed restorations in dentistry. 2) Didnt have major changes during storage that agar and alginate have. In the two-stage technique any compression of the primary putty impression on reseating over the wash during the secondary impression will be compensated for to some degree by the shrinkage of the material. It is a new type of condensation silicone with excellent characteristics of initial fluidity. It offers superior consistency and consistent physical properties. Organopolysiloxane Dental Impression material 900ml. View Products. Addition silicone impression materials have a poly-merization shrinkage lower than condensation silicone impression materials (5,30,31). Four impression materials were used: two condensation silicones (Oranwash L - Zhermack and Xantopren L Blue - Heraeus Kulzer) and two addition silicones (Elite H-D + regular body - Zhermack and Flexitime correct flow - Heraeus Kulzer). dental college, Jammu 2 Lecturer, Department of prosthodontics & crown and bridges, Indira Gandhi govt. Materials described include irreversible hydrocolloid, reversible hydrocolloid, polysulfide, condensation reaction silicone, addition reaction silicone, polyether, and alginate substitutes. HYDROCOMPATIBLE CONDENSATION SILICONES (POLYSILOXANES) FOR HIGH-PRECISION IMPRESSIONS … Silect ® – Precision C-silicone. The design principles and methods for making custom impression trays are described. Darby's Condensation Silicone Putty is a two part base/catalyst impression system that is soft and malleable during mixing. A nonionic surfactant can be added to the paste in the manufacturing process to render a degree of hydrophilicity to the surface of the material. Of these, addition silicone and polyether are most commonly used (Daou, E. 2010). alphasil ® PERFECT. and silicone impression materials have been modified so that the working time, viscosity, and flexibility of the polyethers have been improved and, with the introduction of addition silicones, their accuracy has become exceptional. The new technique pairs a silicone impression putty with a light body wash material. Ethyl alcohol is the reaction by-product. Hamalian TA(1), Nasr E, Chidiac JJ. 0 . It is useful in processing cold cure acrylic partials, repairs, relines and denture re-bases. > Impression materials > Condensation-curing silicones. With regard to impressions, for example, silicone is used in cases of root canals, soft structures and bone tissues, in addition to implants and functional impressions of full dentures. Top quality – made in germany. The set material is less rigid than polyether (though stiffer than polysulfide). Author information: (1)Division of Prosthodontics, Columbia University College of Dental Medicine, New York, NY, USA. VPS Pe PS, Silicone 100 log TIME (minutes) REACTION CONVERSION (%) CONTINUOUS PHASE: Polymer = Mercaptan Functional Polysulfide Crosslinking Agent = Sulfur and/or Lead Peroxide I am a believer in taking diagnostic impressions with VPS material. When should they be used? Type iv gypsum compatibility with five addition-reaction silicone. substance out of which a thing can be made: I bought the material for the drapes. 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