MATERIALS DEFINITION “Impression is defined as negative likeness or copy in reverse of surface of an object, an imprint of teeth and adjacent structures for use in dentistry.”. Impression materials are of three types: the rigid type, the thermoplastic type, and the elastic type. Enter your email address to subscribe to this blog and receive notifications of new posts by email. 1. chemical reaction or physical change 2. Bruxism – Causes, Symptoms and Treatment (Night or Day Grinding). E.g. The process makes it necessary that whatever the activity, there is a need for monitoring through proper documentation. Polysulfides Polyether, Addition silicones, Condensation silicones, E.g. The combination of putty and fluid silicones can be a good choice. 2/23/2016 2 … Example- Plaster of Paris. 1. Primary impression materials Impression compound Alginate Impression material classification and basic requirements: Classification of impression materials: Non elastic - used in mouth with no undercuts or no teeth. Inelastic Materials. Required fields are marked *. Notify me of follow-up comments by email. Electronic impressions IMPRESSION. It is the negative replica of the structures of the oral cavity be it hard(tooth) or soft(gingiva, mucous membrane) structures, which are used to fabricate the cast or model of the patient, and for making crowns, dentures, and other prosthesis. The function of an impression material is to accurately record the dimensions of the … You should always understand that a Patient to Doctor interaction is the only way to properly diagnose the problem and decide its cure. A. As the name signifies Muco static means no pressure is applied On the tissues while taking Impression. The figures show the different test apparatus, instruments and components. 1. (adsbygoogle = window.adsbygoogle || []).push({}); II) Based on type of impression & area of use, A) Edentulous- For complete denture prosthesis, IV) Based on the amount of pressure applied, ii) Circular motion (with glass slab & spatula), VI) Based on the tray used for impression. All the content in this blog is only for educational and informational purpose. Classification of impression material. Impression materials that are used today can be classified according to their composition, mechanism of setting, mechanical properties, and applications. Dental Impression is the negative replica of hard and soft tissues of the mouth. cooled with no change in chemical makeup. Mucostatic Impression technique. Impression materials can be classified according to their composition, setting reac-. impression compound; ii) Irreversible (thermosest) E.g. Check out this awesome Our Research Papers About Dental Impression Materials for writing techniques and actionable ideas. Definition: It is the negative replica of the structures of the oral cavity be it hard(tooth) or soft(gingiva, mucous membrane) structures, which are used to fabricate the cast or model of the patient, and for making crowns, dentures, and other prosthesis. – Some restorative materials simulate the appearance of the tissues that are being replaced. no change in structure or shape. i) Reversible (thermoplastic) E.g. E.g. ZOE impression paste, Elastomers for CD, e.g. Zoe impression paste, Impression plaster. Elastic materials expand and contract with. 16.2 Classification of impression materials Many criteria may be used to classify impression materials. Zinc oxide eugenol. Click to share on Twitter (Opens in new window), Click to share on WhatsApp (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Pinterest (Opens in new window). Dental Drugs and Pregnancy – Safety and Contraindications, Classification of Desensitizing Agents used in management of Dentin Hypersensitivity, Periodontal Curettes – Types, Uses Differences and Numbering, Dry Socket Pictures | Pictures of Alveolar Osteitis, Kennedy’s Classification of Edentulous Space and Applegate’s Rules, Protocol for Management and handling of Dental Hospital Waste - Color coding for waste disposal, Types of Bevels and their Uses in Tooth or Cavity Preperation. All three types have advantages and disadvantages. Impression material is of liquid or semi-solid nature when first mixed and placed in the mouth. Required fields are marked *. Your email address will not be published. There are 4 groups of elastomers; polysulfide, condensation silicone, addition silicone and polyether; each differ in their setting mechanism and their physical and chemical properties. Wax and impression compound 3. Table 8-1 shows the classification based on the setting mechanism and mechanical characteristics. Elastomeric impression materials are in common use. Thumb sucking: How can I help my child quit thumb sucking? This blog doesn’t  provide any medical/dental advice, diagnosis or treatment. Hydrocolloids (aqueous) - … Pericoronitis – Infection associated with Wisdom Teeth, Dental Implants: Indications and contraindications, Ameloblastoma: Symptoms Causes and Radiographic feature of Jaw tumor. In prosthodontics, impression materials are used to record intraoral structures for the fabrication of definitive restorations. Your email address will not be published. Occlusal. d ental materials 28 (2012) 756–762 757 Table 1 – Composition and mixing ratios for commercial alginate impression materials. Which of the following classifications of impression materials can also be referred to as (bite) registration? 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