polyvinylsiloksan

Polyvinylsiloxane, often abbreviated as PVS, is a type of silicone-based dental impression material. It is a two-part system that undergoes a process called addition polymerization, where two components are mixed together to create a flexible, elastic material. This chemical reaction is typically triggered by a platinum catalyst. PVS materials are known for their high dimensional stability, meaning they retain their shape and accuracy over time, which is crucial for dental restorations. They also exhibit excellent elasticity, allowing for easy removal from the mouth without distortion.

The properties of PVS make it a popular choice for a variety of dental applications, including taking impressions for crowns, bridges, dentures, and implants. It is available in different viscosities, ranging from very low to very high, allowing dentists to select the appropriate material for specific clinical needs. The setting time of PVS can also be controlled by adjusting the amount of catalyst used. Once set, PVS impressions are resistant to tearing and accurately capture fine details of the oral tissues. Disinfection of PVS impressions is generally straightforward, as they are compatible with common dental disinfectants.