Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Impression materials, impression trays, and poured stone cast have been said to be the main source of cross infection between patients and dentists. Disinfection or sterilization? Close suggestions. Impression materials that have been exposed to infected saliva and blood provide a significant source of cross contamination[1]. Looks like you’ve clipped this slide to already. Minor applications include dentistry and surgical/medical, e.g., plaster casts. You can change your ad preferences anytime. Thus, the minimum thickness of the material in the tray should be three to four times more than the largest undercut (Hamalian, T. A. et al., 2011). moderate knowledge of disinfection of dental impression materials but were not putting that knowledge to practice [26]. Now customize the name of a clipboard to store your clips. Estafanous, C.J. Clipping is a handy way to collect important slides you want to go back to later. Disinfection of various Impression materials Impression compound- Iodophors or chlorine compounds. Impression materials. Outgoing lab work: Once an impression have been taken rinse it under running water to remove any visible debris and place in the disinfectant solution for 10 minutes. If you continue browsing the site, you agree to the use of cookies on this website. 2) In dipping and Immersion technique: Methods of disinfection ( Spraying, Immersion and Photodynamic therapy). Since sterilization of impressions is not possible, because of the high temperature and time needed, disinfection is the method of choice. Ten impressions of each material were randomly assigned to a treatment group: (1) no disinfectant; (2) 10‐minute dual phenol immersion; (3) 1‐hour dual phenol; (4) 10‐minute sodium hypochlorite (NaOCl); and (5) 1‐hour NaOCl. D. allowing the impression to sit 24 hours in water until all the organisms die. Disinfection of Irreversible Hydrocolloid Impressions: A Comparative Study McNeil et al, Int J Prosthodont 1992; 5:563-567 They evaluated the efficacy of disinfection systems on irreversible hydrocolloid impressions contaminated with Streptococcus sanguis or poliovirus and found that the impression materials could act as a vehicle for the transfer of both bacteria and viruses. The actual micro-organisms found have been reported, for example, by Jennings and Samaranayake [2] , and Look et al. In: Anusavice KJ (ed): 26.R.G. no changes in physical properties of impression material.30 Cast disinfection: Microorganisms have been recovered from dental cast as well. Background:: Disinfection of impression materials prevents cross-contamination; however, the disinfectants may alter the wettability property. I. Disinfection of Impressions A. c/o Department of Prosthodon cs, School of Oral Health Sciences, University of the Witwatersrand, Johannesburg. Zhermack offers high performance products for impression disinfection: broad spectrum of action, according to the latest European Norms validated on disinfection, and high compatibility with different types of impression material. Scribd is the world's largest social reading and publishing site. See our User Agreement and Privacy Policy. 2% … Palenik, and J.A. Yilmaz H, Aydin C, Gul B, et al. Impression material was mixed according to the manufacturer’s instructions and was loaded into the mold to make an impression of the die. The numbers of microorganisms on polysulfide impression materials diminished rapidly with time even without disinfection, and a 30-minute disinfection procedure resulted in total microbe elimination. If a rubber bowl is used when ing the prepar alginate, it must be well cleaned and disinfected. Alginate-0.1% sodium hypochlorite for 10 sec or iodophors. 30. Impressions disinfectants and cleaners Solutions for impressions cleaning and disinfection and for the cleaning of alginate and gypsum residues on instruments. disinfection agent is very important, because it must have wide action spectrum without altering the physic-chemistry proper-ties from the impression materials14-16. impression materials over the hydrocolloid Elastomeric impression materials have higher tear strength than hydrocolloid. Wear protective eyewear, an outer cover gown with long sleeves, a mask, and gloves when handling a contaminated impression until it has been disinfected. They are more dimensionally stable on storage. The importance of cross-infection control cannot be overemphasized. Now customize the name of a clipboard to store your clips. B. Rinse the Impression. Platt, Disinfection of Bacterially Contaminated Hydrophilic PVS Impression Materials (Abstract 1325). You can change your ad preferences anytime. Such fluids can contain viral and bacterial pathogens, including HIV and hepatitis A, B, and C viruses. Egusa et al, Int J Prosthodont 2008; 21:531-538 We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Tags: Disinfection, Impression 28.06.2016 To maintain infection control it is vital that dental impressions, prostheses work and orthodontic appliances are disinfected correctly before being sent to the laboratory and before placing in a patient mouth. The principal advance in hydrocolloids has been the introduction of the agar/alginate impression technique, which has simplified the procedure and improved the quality of gypsum dies compared with those prepared in alginate impressions. Various impression materials materials on Academia.edu is usually accomplished by A. sterilization with high heat categorized as smooth/shiny matte! 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