7/23/2023 0 Comments Polyether impression material![]() Impression materials that are currently popular include hydrocolloids, addition silicones, polyethers, and polysulfides. Ĭommon impression materials used in restorative dentistry In a laboratory setting, it should be dimensionally stable for accurate pouring of multiple casts and should not affect dimensional accuracy upon disinfection. ![]() Clinically, it should produce an accurate impression secondary to its adaptability to oral structures, have a consistency that is dimensionally stable to resist tearing but results in an atraumatic removal, set within a reasonable amount of time, demonstrate biocompatibility to include a hypoallergenic nature, and have a reasonable cost per use. Ideal characteristics of impression materialsĪn ideal impression material should exhibit certain characteristics in the clinical and laboratory environment. Often, the choice of impression materials depends on the subjective choice of the operator based on personal preferences and past experience with particular materials. Materials used without adequate knowledge of their characteristics can impair a successful outcome. Accurate impressions depend on identifying the applications that do or do not fit each material’s characteristics. ![]() Master casts are used for producing complete dentures, removable partial dentures, crowns, fixed partial dentures, and implant prostheses. Diagnostic casts are used to aid in treatment planning. The more common types of impressions are used for fabricating diagnostic and master casts. The accuracy of these final restorations depends greatly on the impression materials and techniques. Making a cast in gypsum materials from an impression of dental anatomy aids dentists in designing and constructing removable and fixed prostheses. The relationship between static and mobile oral structures must be reproduced accurately for an optimum cast. Accurate impressions are necessary for construction of any dental prosthesis. Impression materials are used to record intraoral structures for the fabrication of definitive restorations. Many impression materials are suitable for use in dentistry. ![]() ![]()
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