2 paste system (base and accelerator. 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. Silicone, being a more elastic material, allows for more uses for dentists than alginate. – Addition silicone impression materials are also called vinyl polysiloxanes and […] sions : addition silicone, condensation silicone, polysul-fide and polyether (18,21,28). Alkyl silicate (Cross linking) 2. Addition Silicones – Addition silicones are the most popular type of elastomeric impression material, especially for crown and bridge impressions. Silicone impression materials that set by condensation polymerization contain an accelerator consisting of a stannous sulfate. 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. Our best C-silicone – SILECT® – was developed using our many years of experience and chemical expertise and employing state-of-the-art production technologies. A silicone mold lends itself well for resin or plaster casting, as well Skin safe and food safe silicone mold rubbers are also available. 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. When should they be used? Kit: 3.5 lb Jar Base Putty, 3 x 20 ml Tubes Catalyst Paste It offers superior consistency and consistent physical properties. These are condensation and addition silicone. polymerize more slowly liberate ethyl alcohol as a byproduct of the polymerization reaction undergo high shrinkage during the first 24 hours. – They are clean and do not have an unpleasant taste or smell. This premium impression material offers excellent technical properties such as very low shrinkage and … Types of Silicone Rubber. Silicones are inherently hydrophobic and as such require excellent moisture control for optimal use. 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). It is useful in processing cold cure acrylic partials, repairs, relines and denture re-bases. Addition silicone. ... 2. condensation silicone 3. polyethers 4. addition silicone. Composition: Base paste 1. The fabri-cation of a casting requires an impression material that Fillers (Colloidal silica or titanium dioxide) (white) Catalyst paste 1. Composition of Polysulfide Impression Materials. - works better with gypsum than elastomeric impression materials. LMW silicone polymer with terminal OH groups 2. Condensation SiliconeCondensation Silicone Impression MaterialImpression Material 11. Addition silicones have become the most used impression material in advanced restorative dentistry. – They are the most accurate, stable, and expensive impression materials. CHEMISTRY A. Darby's Condensation Silicone Putty is a two part base/catalyst impression system that is soft and malleable during mixing. There are two types of silicone impression material, addition and condensation (reflecting each of their setting reactions). Condensation silicones. Become the most accurate, stable, and expensive impression materials fillers ( Colloidal silica or dioxide.: 3.5 lb Jar Base Putty, 3 x 20 ml Tubes Catalyst Paste 1 is a two part impression! 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