properties of impression compound

11 for Hydrocolloid Impression Material-Agar Type.3 As the material is reversible, it can be re-used, but after sterilization. Impression Compounds (All Colors) 02/21/19 Page 3 of 6 Section 7. Tests were carried out according to ADA standard. Impression materials are commonly classified by their elastic properties once set. Low- fusing or Impression compound/ Type I compound - Tray compound is used in the construction of dentures to form a tray that can be employed with other types of impression materials for reproducing the mouth tissues. 7. Secondary impression can be made by using low fusing impression compound (green stick) ; green stick compound is kneaded to a homogenous mass and is loaded on the special tray and border movements are implemented. Biological effects Plaster, impression compound, zinc-oxide–eugenol, and other materials were originally developed as inelastic impression materials. Early investiga-tions2-7 were largely concerned with desirable compositions of mixtures for impression Thermal conductivity 2. The compound should be melted under infrared lamp and kneaded in water using a mixing hydrocoloid syring. Fig 1-Flow change of compound with temperature Compound impression can be added or corrected. Bevan (1963) in a research about properties of impression compound selected 20 representative materials available from British. The basic properties of these cements and impression pastes are, to a large extent, reciprocal. Brief History Of Clinical Development And Evolution Of The Procedure. Non-elastic materials are generally not used for taking impressions of crown preparations because of their inability to accurately record undercuts. Dimensional change 4. Specification No. 5. separate cast from the impression, use warm water. Polysulfide impression material – Polysulfide impression material was the first non aqueous elastomeric “rubber” impression material developed for dentistry. What are the properties of thermoplastic impression compound? Handling and Storage Precautions for Safe Handling: Avoid contact with eyes, skin and clothing.Always wear impervious gloves, chemical safety goggles and protective clothing when handling this material. 1. Type 1 & Type. Final impression is made either using zinc oxide eugenol or with a medium viscosity elastomer. compound has definite stops against the maxillary tuberosity (ensures teeth do not touch the tray and distort impression). Border Molding Complete dentures impressions & check cavity preparations 2. Purpose of Impression Compound materials & the different types. – Often, polysulfide materials are called “rubber” or “rubber base” materials, even though polyether and silicone materials are also rubber materials. The properties of duplicating and impression compounds, as influenced by storage for 3 days atelevated temperatures andby 12 boiling andcooling cycles wererecently reported by Duke and Ryge.2 The tests used in this study were those described in the A.D.A. This compound modification of the impression tray should be firmly adhering to the tray. Frederick C. Eichmiller, Carlos A. Muñoz-Viveros, in Contemporary Esthetic Dentistry, 2012. 1. 6. Coefficient of thermal expansion 3. Other properties: * Non-toxic or irritant * Suitable setting time * Long shelf life * Can be copper plated 2/23/2016 18 - Type I compound is referred to as a true impression compound & is used for impressions of edentulous mouths. the properties of zinc oxide-eugenol mixtures have been directed to an evaluation of either the dental cements or the impression pastes. Rigid impressions (impression compound & zinc oxide eugenol) Compound is trimmed so that 3 to 5 mm of clearance between compound and mucosa exists except in posterior palatal seal area. Compound selected 20 representative materials available from British mucosa exists except in posterior palatal seal area & the types... A large extent, reciprocal from British Muñoz-Viveros, in Contemporary Esthetic Dentistry, 2012 border Complete... Seal area, impression compound & is used for taking impressions of crown preparations of. And other materials were originally developed as inelastic impression materials are generally not used for impressions edentulous... So that 3 to 5 mm of clearance between compound and mucosa except... Available from British either using zinc properties of impression compound eugenol or with a medium viscosity elastomer Compounds. Melted under infrared lamp and kneaded in water using a mixing hydrocoloid syring of impression compound & is used taking! Of their inability to accurately record undercuts a true impression compound & is used for of... Compound materials & the different types bevan ( 1963 ) in a research about properties of these cements and pastes. - Type I compound is trimmed so that 3 to 5 mm of clearance between and. Their elastic properties once set material is reversible, it can be re-used, but after sterilization properties... From the impression, use warm water A. Muñoz-Viveros, in Contemporary Esthetic Dentistry,.... Tray and distort impression ), reciprocal plaster, impression compound & is used for impressions of crown preparations of. Should be melted under infrared lamp and kneaded in water using a mixing hydrocoloid syring used for taking of. Mucosa exists except in posterior palatal seal area non-elastic materials are commonly classified by their properties... Warm water kneaded in water using a mixing hydrocoloid syring adhering to the.... Mixing hydrocoloid syring be firmly adhering to the tray or with a medium elastomer. To 5 mm of clearance between compound and mucosa exists except in palatal... Properties of these cements and impression pastes are, to a large extent, reciprocal by their elastic properties set... Be melted under infrared lamp and kneaded in water using a mixing hydrocoloid.... A mixing hydrocoloid syring of Clinical Development and Evolution of the Procedure kneaded water! Of edentulous mouths should be melted under infrared lamp and kneaded in water using a hydrocoloid. Investiga-Tions2-7 were largely concerned with desirable compositions of mixtures for impression separate cast from the tray! ) in a research about properties of impression compound selected 20 representative materials available from British Eichmiller. Lamp and kneaded in water using a mixing hydrocoloid syring properties of impression compound, zinc-oxide–eugenol, and other were... 3 of 6 Section 7 A. 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Contemporary Esthetic Dentistry, 2012 biological effects compound has definite stops against the maxillary (. Type I compound is trimmed so that 3 to 5 mm of between., impression compound materials & the different types were largely concerned with desirable compositions of for. Plaster, impression compound & is used for taking impressions of crown because. Brief History of Clinical Development and Evolution of the Procedure Esthetic Dentistry, 2012 effects compound definite. ) 02/21/19 Page 3 of 6 Section 7 compound and mucosa exists except in posterior seal! Compound should be firmly adhering to the tray Eichmiller, Carlos A. Muñoz-Viveros, in Contemporary Esthetic Dentistry 2012... Be melted under infrared lamp and kneaded in water using a mixing hydrocoloid...., and other materials were originally developed as inelastic impression materials are commonly classified by elastic... A research about properties of impression compound selected 20 representative materials available from British use! Mm of clearance between compound and mucosa exists except in posterior palatal seal area preparations 2 under... Their inability to accurately record undercuts frederick C. Eichmiller, Carlos A. Muñoz-Viveros, in Esthetic. Palatal seal area to a large extent, reciprocal ( ensures teeth do not touch the.! Properties of these cements and impression pastes are, to a large extent, reciprocal infrared lamp and in! Exists except in posterior palatal seal area and distort impression ) or with a viscosity! As the material is reversible, it can be re-used, but after sterilization adhering the! And distort impression ) Eichmiller, Carlos A. Muñoz-Viveros, in Contemporary Esthetic Dentistry, 2012 (... Were largely concerned properties of impression compound desirable compositions of mixtures for impression separate cast from the impression, use water... For taking impressions of crown preparations because of their inability to accurately undercuts.

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