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Polyvinyl siloxane (PVS), also called poly-vinyl siloxane, vinyl polysiloxane (VPS), or vinylpolysiloxane, is an addition-reaction silicone elastomer (an addition silicone). It is a viscous liquid that cures (solidifies) quickly into a rubber-like solid, taking the shape of whatever surface it was lying against while curing.
Polyvinyl siloxane is an addition silicone which is chemically similar to impression silicones with modifications to the flexibility. [17] The advantages of Polyvinyl siloxane include its accuracy, ease of handling and dimensional stability. However, the material shrinks on curing and has a short working time. [18]
Polyvinyl siloxane (vinyl polysiloxane) is used to make dental impressions and industrial impressions. The use of a poly-siloxane precursor in polymer derived ceramics allows the formation of ceramic bodies with complex shapes, although the significant shrinkage in pyrolysis needs to be taken into account. [citation needed]
Pages in category "Impression material" The following 7 pages are in this category, out of 7 total. ... Polyvinyl siloxane; S. Silicone; Z. Zinc oxide eugenol
Polyvinyl siloxane impression material is one of several very accurate impression materials used when the final impression is taken of the maxillary and mandibular ridges. A wax rim is fabricated to assist the dentist or denturist in establishing the vertical dimension of occlusion .
Polyvinyl siloxane, a liquid that can quickly solidify, is used to make an impression of the desired area and gets examined so that the impression matches the defective spot. Impression is transformed into a cast using type III dental stone (a substance similar to plastic). Newly formed cast is then used to make a wax model.