![]() ![]() All lab putties have a reasonable setting time, are dimensionally very stable and highly accurate in detail reproduction. ![]() Every kind of lab putty can be stretched or compressed slightly while maintaining the ability to rebound without permanent deformation. Examples of addition reaction lab putty are Flexitime (Heraeus-Kulzer) and Matrix Form (Anaxdent North America). As with condensation reaction silicone, sulfur contamination from natural latex gloves can inhibit the setting reaction of addition reaction silicones and alternatives should be used if desired. #Dental impression putty free#The base and the catalyst are differentiated by color and the two are mixed by hand until a homogenous, streak free mass is achieved. When used as lab putty, this type of material is packaged as two high viscosity putties. Latex gloves have been implicated in interference of the setting reaction so a different glove material is suggested.Īddition reaction silicones are familiar to restorative dentists as cartridge dispensed polyvinylsiloxane (PVS) impression materials. #Dental impression putty skin#Some users report skin irritation from the catalyst and recommend using gloves while mixing this type of lab-putty. Examples of this type of lab putty are Sil-Tech (Ivoclar Vivadent) and Lab-Putty (Coltene/Whaledent). The highly filled putty base has less polymer and results in less polymerization shrinkage. The reaction and the by-product can lead to polymerization shrinkage, so this kind of material is generally packaged with a highly filled putty base and a lower viscosity catalyst activator. Lab putties may be differentiated by their chemistry:Ĭondensation reaction silicones irreversibly cure leaving ethyl alcohol as a by-product and aren’t meant to polymerize intra-orally. Lab putty is a silicone impression material and falls into the more general category of elastomeric impression materials. ![]() The usefulness extends into clinical applications as well – for instance, chairside space analysis and as a matrix for direct restorations. In the lab, it can be used for a variety of applications like restorative space analysis, as a matrix for provisional fabrication or as a guide for the fabrication of definitive restorations. Lab putty is the dental material's version of baseball’s utility player. ![]()
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