5/18/2023 0 Comments Dental impressionSilicones are of two types Addition silicone and Condensation silicone, classified based on the type of polymerization reaction that takes place during the setting process.Įlastomers are available in different consistencies ranging from light body to putty like consistency. The types of elastomeric impression materials are: Modifications in alginates include dust free alginates, siliconized alginates and alginates containing disinfectants.Įlastomers also known as rubber base impression materials are a group of rubber like polymers have high accuracy in impression making. The types of alginate include fast set (type 1) and normal set (type 2).Ĭhromatic alginates change color during the mixing and setting phases to help the dentist keep track of the process. Alginates are used to make preliminary impressions for dentulous and edentulous patients. It is an irreversible elastic hydrocolloid which is a mucous extract yielded from some brown sea weeds. On the basis of rigidity, they might be categorized as rigid, such as impression plaster and impression compound, and elastic such as alginate and elastomeric impression materials.Īlginate is a widely used dental impression material. Thermally setting materials are reversible while the chemically setting ones are irreversible. Based on the mode of setting, they are classified as thermal setting and chemical setting. The impression materials used in dentistry can be classified under various heads. What are the different types of impression materials?
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