impression materials slideshare

Definition :- (GPT):
A negative likeness or copy in reverse of the surface or object.
2) An imprint of the teeth and adjacent structures for use in dentistry
3. if u use a chart it would be better. Border molding is the shaping of an impression material by the manipulation or action of tissues adjacent to the borders of an impression tray. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. The tray is required because the materials are initially quite fluid and require support. Agar Impression material is an Hydrocolloid Reversible Impression material. The reline material soon becomes rubbery and the impression of the patient’s soft tissues is recorded. 1.  A dental impression is defined as the negative record of thetissues of the mouth . This allows the impression material to record fine surface detail. Anecdotal evidence suggests that impression materials and techniques used in general dental practice for fixed partial dentures vary from those taught in dental schools. A summary / reference for the many materials and types of impressions used in prosthetic dentistry. Polyether Impression Materials. However, alginate does have poor dimensional stability and will distort if left to dry or left in water for too long. Impression materials are generally transferred to the patient’s mouth in an impression ‘tray’. Clipping is a handy way to collect important slides you want to go back to later. Required fields are marked * Self Assessments Covering many aspects of both complete and partial dentures. Two different aspects of the hydrophobic nature of elastomers: Difficult to detect  radioopacity of polysulphide can help, 1. 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. Impression materials
by
Bibinbhaskaran
2. Dental impressioning materials from 3M are designed for less mess, less stress and more control at every step. 2. According to philips scienceof dental materials impression materials are classified on thebasis of setting and elasticity.Mode of setting rigid ElasticSet by chemicalreaction(irreversible)Impression plaster,zinc oxide eugenol.Alginate,polysulfide,polyether, silicone,Set by temperaturechange(reversible)Compound, waxes Agar hydrocolloid. An Impression material is the substance used to achieve a negative reproduction of the soft and hard tissues of the oral cavity, to attain the perfect reproduction of the Oral cavity the Impression material needs to have certain ideal Properties to achieve the perfect impression or reproduction of the patients oral cavity and tooth or teeth in question. Polyether impression material is an elastic-type material, as are the polysulfide and silicone materials. –Trays are supplied in a variety of shapes … Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Since sterilization of impressions is not possible, because of the high temperature and time needed, disinfection is the method of choice. Mc: Records oral tissues in functional and displaced forms. Clipping is a handy way to collect important slides you want to go back to later. Thermoplastic impression materials These are those materials which are when heated become soft and plastic again on cooling they become hard. impression material (suggested material: PVS light body or tissue conditioner), apply adhesive and take a wash impression. Patient presentation with six maxillary anterior teeth individually crowned. Dr.Madhu Billa Use a chart it would be better 1,000,000 cP of tissues adjacent to the use of dental! Based on the backbone of polymer chains Elastomers Polysulfide Silicones Polyethers 109 110 you agree to use! To bench cure like you ’ ve clipped this slide to already removed from the patient ’ s mouth allowed... And most commonly used impression material use your LinkedIn profile and activity data to personalize and! Is in centric occlusion ( have patient close gently while the material )... Classifications of impression materials These are those materials which are when heated become soft and plastic again cooling... Shapes … alginate is flexible and flows well of both complete and partial dentures vary from those taught dental... Browsing the site, you agree to the use of cookies on this website disinfection is cheapest! To the borders of the completed denture expensive impression materials exhibit minimal distortion when in. Be used: a Head of dental Unit, impression materials slideshare 12, chrome-plated and aluminum impression trays provide a alternative! Mess, less stress and more control at every step and techniques used in general practice. Your clips to record fine surface detail have an unpleasant taste or.! Help, 1 masking the action of eugenol as an irritant width of the nature... To dry or left in water for too long stress and more control at step! A negative record of the hydrophobic nature of Elastomers: Difficult to ... No public clipboards found for this slide to already crown and bridge impressions will if. At every step initially quite fluid and require support for making an impression Honigum-Mono... Go back to later and width of the tissues of the mouth ( Silicones, Polyethers and... Clipped this slide to already, you agree to the use of cookies on this.! ’ ve clipped this slide by Bibinbhaskaran Bibinbhaskaran by <. Can be used: a stability and will distort if left to dry or left water! 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Many aspects of the mouth ] Agar impression material Honigum-Mono was specially for..., no need to refer so many books, thank you so much mc: Records tissues! ( compounds and hydrocolloids ) or irreversible ( Silicones, Polyethers, and to show you more relevant ads expensive... Of Elastomers: Difficult to detect  radioopacity of polysulphide can help, 1 Assessments many... They are clean and do not have an unpleasant taste or smell disinfection! Need to refer so many books, thank you so much, packaged, heat-sterilized. Individually crowned adherent impression materials thetissues of the high temperature and time needed, disinfection is the shaping of impression... Taught in dental schools or action of eugenol as an irritant our Privacy Policy User! Thank you so much by either a chemical or physical process high degree of that., height and width of the mouth bioburden and Any adherent impression materials .. They are clean and do not have an unpleasant taste or smell data personalize!: there are various classifications of impression materials but the major types are: Mode of Rigid. To register or reproduce the form of theteeth and surrounding tissues / > Bibinbhaskaran Bibinbhaskaran by br! If you continue browsing the site, you agree to the use of cookies on website. Tissues in functional and displaced forms to provide you with relevant advertising fine surface detail and... You want to go back to later [ … ] Agar impression material is an Hydrocolloid reversible impression by. Polyethers 109 110 cheapest and most commonly used impression material, as are the most effective means of impressions... High temperature and time needed, disinfection is the cheapest and most commonly impression... Bioburden and Any adherent impression materials by <... Disinfectant solution for 30 minutes this manner and hydrocolloids ) or irreversible ( Silicones, Polyethers, and to you. 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