Alkyl silicate (Cross linking) 2. These are condensation and addition silicone. – Addition silicone impression materials are also called vinyl polysiloxanes and […] Addition silicone. sions : addition silicone, condensation silicone, polysul-fide and polyether (18,21,28). 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. Condensation SiliconeCondensation Silicone Impression MaterialImpression Material 11. Addition silicones have become the most used impression material in advanced restorative dentistry. A silicone mold lends itself well for resin or plaster casting, as well Skin safe and food safe silicone mold rubbers are also available. LMW silicone polymer with terminal OH groups 2. A dental precise impression material comprises condensation or addition type room temperature-vulcanizing silicone, and further contains 0.1 to 10.0 weight % of at least one protein soluble or slightly soluble in water optionally with 0.05 to 5.0 weight % of at least one hydrophilic nature-affording agent selected from hydrophilic silicone oils and nonionic surface active agents. Darby's Condensation Silicone Putty is a two part base/catalyst impression system that is soft and malleable during mixing. – They are clean and do not have an unpleasant taste or smell. Silicone impression materials that set by condensation polymerization contain an accelerator consisting of a stannous sulfate. This premium impression material offers excellent technical properties such as very low shrinkage and … ... 2. condensation silicone 3. polyethers 4. addition silicone. Addition Silicones – Addition silicones are the most popular type of elastomeric impression material, especially for crown and bridge impressions. Types of Silicone Rubber. Composition of Polysulfide Impression Materials. When should they be used? Composition: Base paste 1. Our best C-silicone – SILECT® – was developed using our many years of experience and chemical expertise and employing state-of-the-art production technologies. In the 1950s the rubber base materials, first in the form of the polysulfide and later the silicone, began to be used as dental impression materials (9). polymerize more slowly liberate ethyl alcohol as a byproduct of the polymerization reaction undergo high shrinkage during the first 24 hours. It is useful in processing cold cure acrylic partials, repairs, relines and denture re-bases. It offers superior consistency and consistent physical properties. – They are the most accurate, stable, and expensive impression materials. Fillers (Colloidal silica or titanium dioxide) (white) Catalyst paste 1. 2 paste system (base and accelerator. There are two types of silicone impression material, addition and condensation (reflecting each of their setting reactions). - works better with gypsum than elastomeric impression materials. Zetaplus System, Zhermack’s first ever silicone range, has been on the market for over 30 years and provides a versatile solution to the diverse demands of daily clinical practice. CHEMISTRY A. Silicone, being a more elastic material, allows for more uses for dentists than alginate. Kit: 3.5 lb Jar Base Putty, 3 x 20 ml Tubes Catalyst Paste Silicones are inherently hydrophobic and as such require excellent moisture control for optimal use. Condensation silicones. The fabri-cation of a casting requires an impression material that Popular type of elastomeric impression materials silicones are inherently hydrophobic and as such require excellent moisture for. 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