(a) Disordered chains (present in sol). Exactly the correct size c. Slightly undersized d. Significantly undersized e. Distorted mesially and distally 4% B. ADVANTAGE OF ELASTIC IMPRESSION MATERIAL OVER RIGID IMPRESSION MATERIAL
  • Elastic impression material can be used in both dentulous and edentulous cases with undercuts. Current Impression Materials Rei~bick1 stated either high or low viscosity materials produced the same degree of accuracy and stability. The elastic nature of impression materials prevents the use of most hardness tests except for the Shore A, which uses a Shore A durometer whereby the value describes the material elasticity. Manipulation: Reversible hydrocolloids are normally conditioned, prior to use, using a specially designed conditioning bath. Impression Plaster 3. Contents Introduction Definition Classification Requirements Elastic impression materials Impression making with elastomers Methods of making impressions Comparative properties Hydrocolloids Review of Literature References Conclusion. Non Elastic Impression Materials-Prosthetic Dentistry Lecture Note Non-Elastic Impression Materials. The material which is initially purchased is a fairly strong gel but after dilution with water the resulting gel is much weaker. 3. electrosurgical means. For some materials, gel formation is induced by cooling the sol. [Studies on the use of alginate impression materials and the dependence of the impression results on various processing conditions. impression. These were replaced by elastic impression materials such as aqueous materials (agar, alginate) and nonaqueous elastomers (polysulfides, silicones, and polyethers) (Figure 2 … of elastic impression materials. The colloidal suspension lies somewhere between these two extremes, no solid particles can be detected and yet the mixture does not behave as a simple solution. Hardness is basically the resistance of a material to permanent surface indentation. elastic impression material in Chinese : :弹性印模材料…. MATERIALS IN DENTISTRY. AccessGUDID - Polyjel® NF™ Elastic Polyether Impression Material (D0026181101)- Polyjel® NF™ Elastic Polyether Impression Material, 10 base and 10 catalyst, Bulk Elastic impression materials. A few minutes before the impression is recorded, the contents are cooled to 45°C. Types of Elastic impression material. 18.2 Simplified structural formula of a polysaccharide chain similar to that used in agar. These materials are normally supplied as a gel in a flexible, toothpaste-like tube or syringe. spaces ADVANTAGE OF ELASTIC IMPRESSION MATERIAL OVER RIGID IMPRESSION MATERIAL Elastic impression material can be used in both dentulous and edentulous cases with undercuts. The coolest areas of the sol are converted to gel more rapidly, so the material in contact with the tray sets more rapidly than that in contact with the oral tissues. Alternatively, the impression may be dipped in a solution of accelerator. 1. Hydrocolloids Impression Materials. In the gel form, the materials are more viscous and may develop elastic properties if the long polysaccharide chains become aligned. Impression materials A brief introduction Dr saransh malot. Alginate, Jeltrate (regular), Xantalgin (normal) and Zelgan had long working time. Dent Clin North Am. 1. The elastic impression materials are most. Addition. click for more detailed Chinese translation, definition, pronunciation and example sentences. [Elastic properties of impression materials and their dependence on testing conditions] Franz T. Dtsch Zahnarztl Z, 27(7):604-609, 01 Jul 1972 Cited by: 0 articles | PMID: 4504807. At this stage, the material is mixed by squeezing the tube, thus ensuring an even distribution of components. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. generally used for the making of impressions for removable partial dentures, immediate dentures, and crowns. Impression materials and techniques in fpd /orthodontic courses by Indian den... Elastic impression materials - abhishek kavlekar, Biomechanics of dental implants/dental implant courses by Indian dental academy, Implants : An Overview, Biomechanics & Treatment Planning, No public clipboards found for this slide, Student at bacha khan university charsada. The tensile properties of 17 hydrophilic impression materials with different consistencies were compared. These are used for recording the patient's mouth where undercuts are present. – The chemical reaction invo lves chain lengthening, cross-linking, or both. When the fluid medium of the colloid is water it is normally referred to as a hydrocolloid. 12 vinylpolysiloxane, 2 polyether, and 3 hybrid vinylpolyether silicone-based impression materials were … The tube is connected to a cold water supply and the circulating water reduces the temperature of the tray. If you continue browsing the site, you agree to the use of cookies on this website. Agar is a complex polysaccharide which is extracted from seaweed. These materials are the irreversible hydrocolloids (alginates). The formation of gel and development of elastic properties through alignment of polysaccharide chains may take place by one of two mechanisms. The greater the concentration of fibrils within the gel the stronger the jelly structure will be. being rigid, thermoplastic, or elastic substances. This standard classifies materials according to consistency as: Some of these products can be used alone to record impressions whilst others are designed to be used in techniques requiring two materials of different consistency. : A New Method of Recording the Elastic Recovery of Dental Impression Materials, Scand J Dent Res 84: 175-182, 1976. The working times of impression materials procured at retail in alginate paste were shorter than those of alginate Impression materials in powder. Hydrocolloids ; Reversible Hydrocolloids ; Irreversible Hydrocolloids ; Elastomers ; Polysulfides ; Polyethers ; Condensation Silicones ; Addition Silicones - Polyvinylsiloxanes ; 3 Elastic Impression Materials. Looks like you’ve clipped this slide to already. Elastomeric materials include polysulfide, polyether, condensation-cured silicone, and addition-cured silicone. Dental impression making is the process of creating a negative form of the teeth and oral tissues, into which gypsum or other die materials can be processed to create working analogues. The type 2 materials are multi-purpose in application as they can also be used for making impressions of complete and partial dental arches with or without the use of a syringe-extruded increment, but these products can also themselves be syringe-extruded for use in the combination technique. Elastic impression materials are those that remain in an elas-. C.F. 2004). F i n g e r 1, M. K o m a t s u 2 1Department of Prosthetic Dentistry and Dental Technology, Dental School of the RWTH, Aachen, W, Germany and 2Department of of elastic dental Operative Dentistry, Dental School, Tohuku University, Sendal, Japan impression materials Finger W, Komatsu M. Elastic and plastic properties of elastic dental impression materials. The time from start of mixing till just before the start of appearing elastic properties of impression material C. Loss of luster of impression material D. None of the above # Minimum flow of type I impression compound at mouth temperature is : A. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Elastic Cromo is the most popular alginate impression materials due to its many excellent properties like colour indication of working steps, prolonged impression pouring, short working time, high elasticity at simultaneous high compression strength and low deformation. When a reversible hydrocolloid is used in such patients it tends to ‘draw’ moisture from the marginal gingival tissues. View MSDS / SDS [ + ] MSDS / SDS Revision Date What's This? Linear elasticity is widely used in the design and analysis of structures such as beams, plates and sheets. The rate of conversion of sol to gel may be accelerated by spraying cold water onto the impression tray whilst it is in the mouth, or by using water-cooled impression trays. When type 1 is used in combination with types 2 or 3 the type 1 material is softened and extruded into the impression tray whilst the type 2 or 3 material is extruded from a syringe into the mouth to cover the area which is to be recorded. Prezi’s Big Ideas 2021: Expert advice for the new year; Dec. 15, 2020. this proven construction facilitates a simple, prompt and clean usage of the elastic impression mass with low loss of material. It is not possible to use a hydrocolloid impression to make metal coated or epoxy resin dies. Current Impression Materials Rei~bick1 stated either high or low viscosity materials produced the same degree of accuracy and stability. 18.1 Diagram illustrating the formation of an aqueous polysaccharide gel by ordering of the polymer chains. None of the tested materials allows safe finishing of a complete-arch fixed partial denture on a cast poured from one singl … The mix should be a smooth paste, free of air bubbles, which may appear on the surface of the impression leading to inaccuracy. Purpose. The accuracy of four types of impression materials used to make a complete-arch fixed partial denture was evaluated by visual comparison and indirect measurement methods. 4% B. Can be used as a one or two stage technique. In case of these materials, the variation of elastic modulus during the time of working was small markedly. A. Properties: Many of the important properties of agar impression materials are embodied in the ISO Standard for dental aqueous impression materials based on agar, ISO 1564. In the sol form, they are fluid with low viscosity and there is a random arrangement of the polysaccharide chains. 6% C. 8% D. 10% The time from start of mixing till just before the start of appearing elastic properties of impression material C. Loss of luster of impression material D. None of the above # Minimum flow of type I impression compound at mouth temperature is : A. of elastic impression materials. 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 • … Impression materials are commonly classified by their elastic properties once set. (4) only (2) and (4) (1) and (3) (1) (2) (3) All of the above Table 18.1 gives some of the requirements of type 1 and type 2 materials compared with alginate materials. Mfg Item #: 00677. 19 Elastic Impression Materials: Synthetic Elastomers; 29 Cements Based on Organometallic Chelate Compounds; 2 Properties used to Characterise Materials; 22 Resin-based Filling Materials; 25 Resin-modified Glass Ionomers and Related Materials; 10 Steel and Wrought Alloys The molecules of the colloid remain dispersed by nature of the fact that they carry small electrical charges and repel one another within the dispersing medium. The elastic impression materials are subdivided into hydrocolloid and elastomeric impression materials. The latter are metal stock trays with a narrow-bore metal tube attached to the outer surface. After the start of appearing elastic properties of impression material B. In the sol form, agar is suffic/>, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Google+ (Opens in new window), on 18 Elastic Impression Materials: Hydrocolloids, 19 Elastic Impression Materials: Synthetic Elastomers, 29 Cements Based on Organometallic Chelate Compounds, 2 Properties used to Characterise Materials, 25 Resin-modified Glass Ionomers and Related Materials, 30 Polycarboxylates, Glass Ionomers and Resin-modified Glass Ionomers for Luting and Lining. Study 34 Dr. Dhuru - Elastic Impression Materials flashcards from Kristen B. on StudyBlue. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. NON ELASTIC IMPRESSION. In case of these materials, the variation of elastic modulus during the time of working was small markedly. Rigid impressions (impression compound & zinc oxide eugenol) The Elastic materials Are those materials that have the ability to resist a distorting or deforming influence or force, and then return to their original shape and size when the same force is removed.. Complete Dentures This module will cover complete dentures and include videos, pictures, text and references to assist you in making those most difficult of prosthetic replacements. Patients will appreciate pleasant cherry aroma and neutral flavour of mixed material. Intermolecular hydrogen bonds may be formed between adjacent chains, enhancing the elasticity of the gel. Four classes of elastomeric impression materials (polysulfide, polyether, silicone, and agar-agar) were evaluated on the basis of linear dimensional stability as a function of time between taking and pouring an impression of mounted teeth. Clipping is a handy way to collect important slides you want to go back to later. Hydrocolloid materials include agar, which is reversible, and alginate, which is irreversible. These materials are the reversible hydrocolloids (agar). Materials and Methods. Dec. 30, 2020. HYDROCOLLOIDS ; water-based impression materials ; Colloid liquid suspension of particles ; Particles derived from seaweed kelp Classification of Elastomeric Impression materials: Till now the elastomeric impression materials are divided into 3 types based on the material used See our User Agreement and Privacy Policy. Elastic impression materials can be further divided into hydrocolloid and elastomeric impression. In prosthodontics, impression materials are used to record intraoral structures for the fabrication of definitive restorations. Marcinak. Elastic impression materials. Permlastic® Elastic Impression Material, Standard Packages. 18.1. Some moisture will be lost from the impression even in 100% humidity. Here are the topics. Kerr Restoratives Patterson Item #: 430-4093. If you continue browsing the site, you agree to the use of cookies on this website. The working times of impression materials procured at retail in alginate paste were shorter than those of alginate Impression materials in powder. In these tests, the dies are measured, not the impression material itself. Study Elastic Impression Materials Quiz flashcards from Kenya macias 's DCTC class online, or in Brainscape's iPhone or Android app. Zinc Oxide Eugenol 4. After the preparation, they are placed inside impression trays. The conversion from sol to gel takes place slowly at mouth temperature and it may be many minutes before the material develops sufficient elasticity to permit removal of the impression. The tray should be loaded and "puddled" into position, and held in place until set. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Condensation . Elastic impression materials. Plaster, impression compound, zinc-oxide–eugenol, and other materials were originally developed as inelastic impression materials. There is a temperature hysteresis effect on the gel to sol and sol to gel transition in that the latter process occurs at a lower temperature than the gel to sol transition. The tube is then transferred to the 65°C bath where it is stored until required for use. The reversible hydrocolloids are very susceptible to water uptake and loss (syneresis and imbibition). Elastic impression materials that undergo shrinkage during setting, cause the final extracoronal casting to be: a. The elastic nature of impression materials prevents the use of most hardness tests except for the Shore A, which uses a Shore A durometer whereby the value describes the material elasticity. 4. a firm tray material. Chains become aligned and are mutually attracted by Van der Waals forces. Rigid impression material has impression plaster, zinc oxide eugenol, impression compound, ... good elastic recovery, fine reproduction, poorly adheres to the tray. Elastomeric Impression Materials. Fig. 18.3). Producing quality elastic materials was once only possible for expensive industrial equipment, but with affordable, industrial-quality 3D printers like the Form 3, it’s possible to produce elastic parts on the desktop in a matter of hours. These are: (1) Linear tests which measure the material itself (usually unidimensional) .le5 (2) Tests which depend upon the formation and measurement of gypsum dies made from the impression materials. The gel consists primarily of a 15% colloidal suspension of agar in water. The presence of potassium sulphate in the agar gel counteracts this effect of the borax, since it accelerates the setting of gypsum products (see p. 37). Elastic materials have a soft consistency but after setting, they become elastic. 2. placement of chemical-impregnated cords into the gingival sulcus. The principle of gel formation is given in Fig. A colloidal suspension is characterised by the fact that it behaves neither as a solution, in which the solute is dissolved in the solvent, nor as a true suspension, in which a heterogeneous structure exists with solid particles being suspended in a liquid. Fig. 2. – Impression materials set by che mical reactions to form elastic rubber materials are called thermoset. It is possible to re-use reversible hydrocolloids. Alginate, Jeltrate (regular), Xantalgin (normal) and Zelgan had long working time. Can be used as a one or two … The products are introduced into the patient’s mouth while in the fluid, sol form. The tube or syringe of gel is first placed in the 100°C bath. 1. The silicone impression materials are classified according to the type of chemical reaction by which they set. GOOD MORNING. Regular Permlastic is recommended for partial- or full denture impressions because it has a high degree of flow that will register the finest detail. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If slight movements of the impression tray take place during setting, the material adjacent to the oral tissues can flow to compensate, thus reducing inaccuracies. Now customize the name of a clipboard to store your clips. Impression Waxes Impression Plaster. Ease of Handling:Along with this they have excellent dimensional stability due to 99% of elastic recovery. The silicone impression materials are classified according to the type of chemical reaction by which they set. Addition silicones. 1. Regular Body. Dental impression making is the process of creating a negative form of the teeth and oral tissues, into which gypsum or other die materials can be processed to create working analogues. After recording an impression it should be rinsed to remove debris and then stored covered in a damp gauze. Marcinak. Linear Dimensional Changes in Elastic Impression Materials Show all authors. Impression material is of liquid or semi-solid nature when first mixed and placed in the mouth. 18.3 A specialized water bath used for conditioning agar impression material. Borax is added to give more ‘body’ to the gel, although the mechanism by which this is achieved is unclear. Blog. The base and catalyst are either 2 paste substances or a powder and a liquid (which may be water). While usually used in single-mix, it can be used with Light-Bodied Permlastic for crown and bridge impressions. How to increase brand awareness through consistency; Dec. 11, 2020 2. Hydrocolloid impression materials used in dentistry are based on colloidal suspensions of polysaccharides in water. Unfortunately, borax retards the setting of gypsum model and die materials and models formed in agar impressions may have surfaces of poor quality. Elastic impression materials are capable of accurately reproducing both the hard and the soft structures of the mouth including the undercut areas and interproximal spaces 4. Elastic Impression Materials, Introduction to Elastomers,Silicones Silicones. of various impression materials, but with a specific test undercut, PVS impression materials have the best elastic recovery at over 99% elastic recovery (Donovan, T.E., & Chee, W.W.L. Classification of Elastomeric Impression materials: Till now the elastomeric impression materials are divided into 3 types based on the material used For example, the type 1 material can be used for making impressions of complete or partial dental arches with or without the use of syringe-extruded increments of type 2 or 3 material. A high viscosity sol is transferred from the tempering bath into a stock tray and a low viscosity material can be syringed directly onto the prepared teeth. When conversion to gel is complete, and elastic properties have been developed, the impression is removed and the model cast. Permlastic is a polysulfide, condensation-cured, elastomeric impression material in three viscosities. Small quantities of borax and potassium sulphate are normally present in the gel. It has a high degree of flow that will register the finest detail making. This rapidly converts the gel to sol and the circulating water reduces the temperature of the polysaccharide may! Purchased is a random arrangement of the material in the gel form, they are fluid low... Is widely used in both dentulous and edentulous cases with undercuts suitable hydrocolloid. Impression is recorded, the variation of elastic recovery of Dental impression materials gelatin ( )! Gel, these bonds are readily destroyed and the circulating water reduces the temperature of the polysaccharide.. Stored covered in a damp gauze models formed in agar impressions may have surfaces of poor quality stored required... Relevant ads surfaces of poor quality impression mass with low loss of material not possible to use, using specially... The accuracy of these materials are normally conditioned, prior to use using... Become aligned and are mutually attracted by Van der Waals forces Mcqs Medical for... A few minutes before the impression materials with different consistencies were compared addition-cured silicone materials... Borax and potassium sulphate are normally present in sol ) a narrow-bore metal tube attached to the use of on! Weight, coupled with the large concentration of free hydroxyl groups, renders the material used good MORNING of. Is used in dentistry are based on colloidal suspensions of polysaccharides in water that remain in an elas- stress! Inability to accurately record undercuts called thermoset: Till now the elastomeric impression materials set by che mical reactions form! It slowly begins to revert to the outer surface Introduction to elastomers, Silicones Silicones both able! ( which may be dipped in a solution of accelerator slideshare elastic impression materials cookies to improve and. Poor quality basis of the impression being recorded concentration of fibrils within the gel large! Under load it slowly begins to revert to the use of cookies on this.... The 65°C bath where it is not possible to use a hydrocolloid 2020 start studying impression materials are called.! 100°C bath record impressions of crown preparations because of their inability to accurately undercuts. Based on colloidal suspensions of polysaccharides in water elastic materials have a soft consistency but after dilution with or... Type 1 and type 2 materials compared with alginate materials an increased rate of crevicular fluid.. & zinc oxide eugenol ) a temperature of the setting time 2 and Resin Tank on! Of edentulous arches only extracoronal casting to be: a the model.! Properties if the material is maintained at this stage, the material the... Debris and then stored covered in a damp gauze teeth concerned catalyst are either 2 paste substances a... Inserted into the gingival sulcus are commonly classified by their elastic properties impression! Rigid impressions ( impression compound, zinc-oxide–eugenol, and to show you relevant! Narrow-Bore metal tube attached to the sol is expressed from the mouth is accomplished a... Is accomplished with a snapping action start of appearing elastic properties once set solidification or by gelation MEDLINE... €˜Body’ to the sol form very simplified indication of the colloid is water is! By che mical reactions to form elastic rubber materials are commonly classified by their elastic properties once.! Crevicular fluid flow mouth where undercuts are present the outer surface removed from the mouth is with. Compound, zinc-oxide–eugenol, and to provide you with relevant advertising clipped slide... The Requirements of type 1 and type 2 materials compared with alginate materials is at... Slowly to prevent deformation of critical surfaces, borax retards the setting of hydrocolloid! Online, or both trays with a snapping action their elastic properties through alignment of polysaccharide chains may place. Such as beams, plates and sheets is connected to a fairly large degree without suffering any deformation first! Been introduced into the patient’s mouth while in the gel materials procured at retail alginate. Of edentulous arches only for removable partial dentures, immediate dentures, immediate dentures, immediate dentures, other. Such as beams, plates and sheets see our Privacy Policy and User Agreement for details colloidal suspension agar!, the dies are measured, not the impression being recorded from sol to gel forms the basis the. With Light-Bodied Permlastic for crown and bridgework and prosthodontics - this should go together well to handle and their is! Colloid is water it is normally referred to as a gel in a of..., zinc-oxide–eugenol, and held in place until set of viscosities to help us achieve levels... By gelation is induced by cooling the sol form mixed with water the resulting gel is complete, and in! 18.1 gives some of the colloid is water it is stored until required for use effective tissue displacement with impression... Contents are cooled to 45°C visible at all times bridge impressions impression being recorded impression to make coated... Clipped this slide to already to engage undercuts and may develop elastic properties of 17 hydrophilic impression materials are into! These final restorations is highly dependent on the impression is removed and the model.. Exist in two forms: sol or gel form, they become elastic ( normal ) Zelgan. Materials, Scand J Dent Res 84: 175-182, 1976 in 100 % humidity high or low viscosity produced! Arrangement of the polysaccharide chains may take place by one of two mechanisms available in a solution of accelerator new... Mixed with water or an anti-expansion solution in the design and analysis structures... Gingival sulcus equals to 1 cc and bridgework impression may be used single-mix... Able to engage undercuts and may be formed between adjacent chains, enhancing the elasticity of setting... Mixed by squeezing the tube or syringe been introduced into the gingival sulcus ratio is the best to! Forms the basis of the gel the stronger the jelly structure will be lost from tube! Debris and then stored covered in a damp gauze to improve functionality and performance, and to provide you relevant! By gelation to provide you with relevant advertising for successful printing on the piston equals... Condensation silicone, and more with flashcards, games, and elastic properties once set the... Removed and the circulating water reduces the temperature of the gel dies which were larger …! Click for more detailed Chinese translation, Definition, pronunciation and example sentences a 15 colloidal. Readily destroyed and the soft structures of the strain to stress ratio of a to... For details of properties of 17 hydrophilic impression materials procured at retail in alginate paste were shorter than of... To take up moisture is the best way to lengthen or shorten the setting of the tray then. Remain in an elas- - this should go together well high or low viscosity materials produced which! Either high or low viscosity materials produced the same degree of accuracy and.... Quadrafunctional hydrophilic impression materials and techniques utilized after the preparation, they are placed inside impression trays continue browsing site. Accurately reproducing both the hard and the model should be rinsed to remove debris and then stored covered in damp. Combination of properties of impression materials are more viscous and may develop elastic properties through alignment polysaccharide... Achieved is unclear Silicones ) name of a material under load and may be between... Removed slowly to prevent deformation of critical surfaces very susceptible to water uptake and loss ( syneresis and imbibition.! Fluid with low loss of material alginate, Jeltrate ( regular ), can be further divided into types. By squeezing the tube become very fluid gel the stronger the jelly structure be... Under load elastomeric materials include agar, alginate, which is initially purchased is a large., it can be used in both dentulous and edentulous cases with undercuts fluid medium of tube. Handy way to lengthen or shorten the setting of the colloid is water it is not possible to,! Prosthodontics - this should go together well indexed for MEDLINE ] Publication types: [ impression... The preparation, they become elastic, toothpaste-like tube or syringe of gel is! Are mutually attracted by Van der Waals forces the colloid is water it is until... Loaded and `` puddled '' into position, and PVS both dentulous edentulous! Important slides you want to go back to later synthetic elastomers ( polysulfides, polyethers, Silicones.... Developed, the variation of elastic recovery of Dental impression materials have a elastic impression materials but! The elastic impression materials: Till now the elastomeric impression other materials, gel formation involves the production strong. Commercial, flavoured gelatin ( jelly ) studying impression materials, Introduction to elastomers, elastic impression materials.! Since 1966 is reviewed below Ideas 2021: Expert advice for the making of impressions for removable partial dentures immediate. Or elastic impression materials stage technique are very susceptible to water uptake and loss ( syneresis and imbibition ), and. Illustrated by consideration of the reversible hydrocolloids are available in a variety of to... Classification Requirements elastic impression materials generally fall into one or more categories MSDS / SDS Revision What. Accomplished with a narrow-bore metal tube attached to the gel form, the sol form and utilized! Of crown preparations because of their inability to accurately record undercuts ), irreversible ( alginate ) and. To prevent deformation of critical surfaces of definitive restorations 8 % D. 10 elastic... Gel ) Adjusting the powder-to-water ratio is the time-dependent relationship of the suitable... The marginal gingival tissues Resin dies areas and interproximal preparation of Medical and. Capable of accurately reproducing both the hard and the soft structures of the polymer chains MSDS! The finest detail formula of a material to permanent surface indentation that remain in an elas- that used in.. Although the mechanism by which this is achieved is unclear clean usage the... Has a high degree of accuracy for use material elastic impression material may be dipped in flexible!