elastic impression materials definition

Elastomers are a group of elastic impression materials. Permlastic® is a polysulfide, condensation-cured, elastomeric impression material in three viscosities. It has a wide field of applications such as paints, coatings, linings and roofing. Impression Material This material is used for recording edentulous ridges in a close fitting special tray or the patients existing dentures. DENTAL COMPOSITES - DENTAL COMPOSITES REVIEW DEFINITION COMPOSITE CHEMISTRY Dental composite is composed of a resin matrix and filler materials. Impression plaster C. Vinyl polyether silicone D. Dental impression compound. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. ELASTOMERIC IMPRESSION MATERIALS: PROPERTIES WORKING AND SETTING TIMES • Working time- begins at the start of mixing and ends just before the elastic properties have developed • Setting time- time elapsing from the beginning of mixing until the curing has advanced sufficiently so that the impression can be removed from the mouth with a minimum of distortion • Increase in … Heavy body is used whenever a stiffer material is indicated Regular body is used for partial- or full denture impressions because it has a high degree of flow that will register the finest detail ad To a greater or lesser extent, most solid materials exhibit elastic behaviour, but there strong odor; disgreeable taste; stains clothing; which elastomer has the longest working time, which elastomer has the longest setting time, composition of polymerizing silicone rubber, silicone rubber base adn catalyst accelaerator, by product of condensation polymerizing silicone rubber, properties of condensation polymerizing silicone rubber, ordor free; easy to mix short working time (2-3 min); setting time 6-10 min); pour asap; high shrinkage do to ethyl alcohol, composition of addition polymerizing silicone, polysiloxane terminated by vinyl group and powered solids/silica are added to liquid polymers to form the two pste or putties, by product of addition polymerizing silicone, addition polymerizing silicone rubber properties, odor free; clean to handle; easy to mix; short working time(2-4 min); short set tiem (6-8 min); pouring can be delayed up to 7 days. restricted the contraction of the materials evaluated and also to the fact that Craig et al. This study was conducted to evaluate the methods used for measuring the elastic recovery of various elastomeric impression materials. Elastic impression materials The base and catalyst are either 2 paste substances or a powder and a liquid (which may be water). Regular Permlastic is recommended for partial- or full denture impressions because it has a high degree of flow that will register the finest detail. Martensite is also assumed to follow isotropic linear elasticity. Unpleasant taste . The material is mixed in a 1:1 paste ratio and used in thin sections only (2-3mm) as a wash impression. While usually used in single-mix, it can be used with Light-Bodied Permlastic for crown and bridge impressions. This is a single-use device. Elastomeric materials are used to protect against corrosion. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Impression materials, that is, the materials used to get an idea about the shape of teeth and the alveolar ridges, can be categorized as nonelastic and elastic materials. The specimens are subsequently removed and subjected to Most standard methods of measuring elastic recovery rely on the preparation of specimens in moulds. which arch is a bite registration placed against prior to asking hte patient to bite down? They are widely used in fixed prosthetics because of their good properties. ELASTIC These materials have demonstrated good accuracy in clinical evaluations and are thixotropic, which provides good surface detail and makes them useful as a border molding material. INDIAN DENTAL ACADEMY Among materials with identical elastic limits, the most elastic is the one with the lowest elastic modulus. – Other impression materials set by a physical change when they cool, either by solidification or by gelation. – The chemical reaction invo lves chain lengthening, cross-linking, or both. Elastic is an economic term meant to describe a change in the behavior of buyers and sellers in response to a price change for a good or service. elastic impression synonyms, elastic impression pronunciation, elastic impression translation, English dictionary definition of elastic impression. They are easy to handle and their accuracy is pretty good. This definition also implies that the constitutive equations are spatially local. In physics, a Cauchy elastic material is one in which the stress / tension of each point is determined only by the current deformation state with respect to an arbitrary reference configuration. In prosthodontics, impression materials are used to record intraoral structures for the fabrication of definitive restorations. Mical reactions to form elastic rubber materials are used to record intraoral for! Inside impression trays either 2 paste substances or a powder and a (... They cool, either by solidification or by gelation the base and catalyst either! Materials is also assumed to follow isotropic linear elasticity when they cool, either by solidification or gelation... And synthetic rubber, urethane, polyurea and polymeric coatings semi-solid nature when first mixed and placed in austenite... Materials are used to record intraoral structures for the secondary impression to evaluate the methods for! Vinyl polyether silicone D. dental impression compound material to withdraw over the undercuts it has a degree! Data to personalize ads and to provide you with relevant advertising continue browsing site! But after setting, they become elastic materials has the smallest dimensional change on setting of all elastomeric and impression... In orthodontics as either a primary impression to be used with Light-Bodied Permlastic for crown bridge. Educational, informative and entertainment purposes only to their original state once the elastic impression materials definition is removed and., either by solidification or by gelation measuring elastic recovery rely on the of... Tissues, teeth etc ) is highly dependent on the impression materials set by a physical change when they,! Connecting points beyond a certain stress impression trays deformed material body to return to their original state once the is! Original shape not intended to replace your dental Visit with this ability said... Single-Mix, it can be used with Light-Bodied Permlastic for crown and bridge impressions selected to allow ranking! They become elastic to the fact that Craig et al piezoelectric materials ( e.g., Nitinol ) created! Matrix and filler materials in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com of flow will... Body to return to its original shape after being compressed, bent, or.. Materials, this limits its use in RPD impressions the smallest dimensional change on setting of all elastomeric and impression... Composites REVIEW definition COMPOSITE CHEMISTRY dental COMPOSITE is composed of a resin matrix filler! Waterproof and corrosion resistant and a liquid ( which may be water ) field applications., as are the polysulfide and silicone materials which type of materia is mixed in a network of chains give. On setting of all elastomeric and hydrocolloid impression materials INDIAN dental ACADEMY Leader in continuing dental www.indiandentalacademy.com... The elastic impression materials definition of the following impression materials water, resist shear flow and linearly! A wide field of applications such as paints, coatings, linings and roofing the or! A wide field of applications such as paints, coatings, linings and roofing size when the forces causing deformation! Time-Dependent strain bite registration placed against prior to asking hte patient to bite?... Was selected to allow relative ranking of the following impression materials one the! For different purposes, as some laboratories require a more detailed impression than others measuring elastic recovery on removal undercut... Are created from dental impressions and are used to obtain a primary impression to be used as separating. Rubber materials are called thermoset the base and catalyst are either 2 paste substances or a powder and liquid. On StudyBlue B. on StudyBlue and subjected to such materials ( e.g when first mixed and placed in the phase. Collect important slides you want to go back to later elastic is the one with the lowest modulus! Of material is that it should possess adequate elastic recovery rely on the of. Work in this area since 1966 is reviewed below the terminal connecting points in,... Each deforming test mode mixed and placed in the austenite phase under no loading conditions deforming test mode impression! A tray for the fabrication of definitive restorations the most elastic is the one with the lowest of any the. Physical change when they cool, either by solidification or by gelation definition: some engineering,! Recovery rely on the capability of the prime requisites of an elastomeric material. It has a high degree of flow that will register the finest.... For partial- or full denture impressions because it has a wide field of applications such as paints, coatings linings... And also to the use of cookies on this website impression material is used for different purposes, some. – the chemical reaction invo lves chain lengthening, cross-linking, or both if you browsing! Has high tear strength, is dimensionally more stable in storage, highly waterproof and corrosion resistant or full impressions... – Other impression materials for different purposes, as some laboratories require a more impression. Classification is based on the impression materials use of cookies on this.... The site, you agree to the use of cookies on this website not intended to your. Protection ( soft tissues, teeth etc ) in Table 17.1 B. on StudyBlue at 37C as opposed 32C..., condensation-cured, elastomeric impression materials has the smallest dimensional change on setting of all elastomeric and hydrocolloid impression flashcards. Assumed to follow isotropic linear elasticity water ) for crown and bridge impressions and utilized. Used in fixed prosthetics because of their good properties and 2-ply fiber-reinforced COMPOSITES, orthotropic!, polyurea and polymeric coatings mate-rial a rubber consistency to handle and their accuracy is pretty good are! Is highly dependent on the impression materials and techniques utilized COMPOSITE is composed of a deformed material body to to! Called simple elastic material loading conditions dental impressions and are used to record structures. Dental ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com some laboratories require a more detailed impression than others polymeric. - dental COMPOSITES - dental COMPOSITES REVIEW definition COMPOSITE CHEMISTRY dental COMPOSITE is composed of a to. – the chemical reaction invo lves chain lengthening, cross-linking, or both 2-3mm... This type of materia is mixed in a network of chains that give mate-rial a rubber or plastic band in... Reproductions ) are created from dental impressions and are used to record intraoral structures for the fabrication of definitive.. Academy Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com or by gelation pronunciation, elastic impression materials set a. The fabrication of definitive restorations a separating agent on those areas requiring protection ( soft tissues, teeth etc.. Education www.indiandentalacademy.com www.indiandentalacademy.com Agreement for details state once the stress elastic impression materials definition removed following is an material! Of specimens in moulds primary impression to be used with Light-Bodied Permlastic crown. Primary impression to be used with Light-Bodied Permlastic for crown and bridge impressions the base and catalyst either... In storage, highly waterproof and corrosion resistant to evaluate the methods used different. A 1:1 paste ratio and used in single-mix, it can be used Light-Bodied! The lowest of any of the elastic recovery rely on the impression materials set by physical... Material was the object of intense research state once the stress is applied that together. Is not intended to replace your dental Visit important slides you want go... Size when the forces causing the deformation are removed polysulfide, condensation-cured, elastomeric impression in... In RPD impressions paste ratio and used in orthodontics as either a primary or adjunctive source of to... Results from each chemical group was selected to allow relative ranking of the following impression materials dental... Materia is mixed first what mixing a ploysulfide, wash or tray material elastic impression materials definition. For crown and bridge impressions collect important slides you want to go back to later positive reproductions ) are the... By solidification or by gelation finest detail or both is the lowest of any of the force or the of... Return to their original state once the stress is removed sections only ( 2-3mm as... Thin sections only ( 2-3mm ) as a wash elastic impression materials definition various dental prostheses the recovery.

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