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Silastic material-HongYe silicone Date:2013-04-23

The 1950s the Silastic printed touch materials and polyether India in the 1970s touch materials and created a new era of repair techniques. Such accurate material modulus, dimensional stability and maneuverability, making a wide range of clinical applications. This article describes a new, comfortable silicone impression material (Optosil Comfort and Xantopren the Comfort, Heraeus Kulzer), this material will all kinds of printed touch material advantages rolled into one.
Since the 1950s, the precision modulus with the addition polymerization of silicone rubber, condensation silicone rubber and polyether rubber has a dominant position in clinical practice. Silastic India touch materials, including ointments - ointments and ointment - liquid system. The main component of the ointment is polysiloxane, after the addition of catalyst polymerization. Polycondensation silicone rubber (C Silastic) in the polycondensation process, there will be ethanol molecules from precipitation. Volatile make ethanol in the process saved India to touch the material shrinkage. The extent of the contraction depends on the proportion of filler in the material properties and materials. Polymerization process in India touch the material to produce ethanol through improved formulation to solve. Addition polymerization Silastic Silastic) (A class in 1976, higher accuracy, transgender smaller, more resilient, biocompatible better. By changing one filler in different proportions, can be made into the different viscosity and mobility products. However, a drawback of the addition polymerization of silicone rubber in use latex and gums shrink liquid can affect the polymerization. Therefore, to reconcile the addition polymerization of silicone rubber can not wear gloves, nor liquid used in conjunction with the gingival retraction. Addition polymerization too high hydrophobicity of silicone rubber in the mouth moist environment is also an unfavorable features. In addition, the smooth surface of the plaster model is also affected by the impact of the India touch the material hydrophilic, so some of the addition polymerization of silicone rubber products by adding hydrophilic substances. The other drawback of the addition polymerization of silicone rubber is a short operating time, and to reconcile when the ratio of substrate and catalyst requirements.
In the 1970s, the polyether rubber impression material. Polyether rubber in the polymerization does not produce other substances, so it is a long time to ensure that no deformation. Most studies have shown that it modulo accuracy and Silastic, or not much difference. Operability and hydrophilicity of the polyether rubber is very good, but it is also affected by the effects of gingival retraction fluid control, there are certain problems and its biocompatibility. Comfort system: the polycondensation of silicon rubber the Optosil the Comfort and Xantopren Comfort Silastic latest launched by Heraeus Kulzer comfort system combines the advantages of early types of products. Optosil the Comfort ointment cured hard texture based on different modulo technology, for different purposes. In the second modulo method can be used to take the initial impression tray layer can be used as a modulo France, as the edge of the material in the preparation of functional impression. Xantopren Comfort viscosity, good fluidity, two modulo method can be used for preparation of secondary impression. Can also be used to check the prosthesis fit. Material properties
According to the manufacturer introduced the silicone rubber in the Comfort of Xantopren contain the polyether ingredients, so it is hydrophilic. Stability and replication of the fine structure in the material it is comparable with the addition polymerization of silicone rubber. In addition, it also is not used gingival retraction fluids and latex. Comfort silicone rubber in optosil use a modified polymer formula, and add a ball packing, so that its accuracy is as good as with the addition polymerization of silicone rubber. According to the manufacturer's instructions, Optosil the Comfort ointment and supporting catalyst mixed use, because it is not sensitive to latex, so you can hand to reconcile. Xantopren Comfort silicone rubber is on the 4: 1 twin-tube, mixing gun play when the material after the front of the mixing head is automatically mixed. The modulo technology Silastic modulo technology a modulo method and the second is to take two kinds of mold method. In the second modulo law, the first oil paste silicon rubber to make the initial impression, then the initial impression dressing (such as the removal of an impression on the undercut and production of row overflows Road). The initial impression on the second impression of silicon rubber to take the final impression. With moderate or low mobility materials placed in a modulo Preparation impression tray, mobility good material on the tooth preparation around in the mouth, then modulo the tray into the mouth at once. If done correctly, once the modulo France the same system to take accurate impression.
Mixed results due to the current study, to evaluate the accuracy of various modulo some difficulties. If the technology is used properly but the common view that a different impression accuracy is less than the material itself deformation. Modulo with the tray on the accuracy of the impression, you should use a metal or hard plastic tray. Silastic India touch material thickness of 1.5mm to 2.5mm modulo the most accurate, it is recommended to use individual tray.

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Keywords for the information:Silicone  Silicone rubber  silicon 

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