Storage of the impression and transport to the dental lab 45 10. However, the method of disinfection should be verified with the material manufacturer to prevent distortion of the impression or loosening of the adhesive bond between the impression tray and the impression material. In 2008, Kotsiomiti et al. Most of the studies on impression disinfection focused on the dimen-sional changes and surface details3,10,14,15. of alginate impression material, preparing the mouth, making the impression, removal/inspection of the impression, and storage and disinfection. Impression materials, impression trays, and poured stone cast have been said to be the main source of cross infection between patients and dentists [1]. They stated that there were variations in the impression materials have been standards for definitive edentulous impressions. Major advances in impression materials and their application have occurred during the last decade, with greater emphasis being placed on rubber impression materials than on dental compound, zinc oxide-eugenol, and agar and alginate. spatulation. The efficiency of disinfection methods and their adverse effects on the materials are being evaluated since 19743. Method and Materials . Immediate measurement of the dry material and at 10 and 20 minutes after maintenance on the … Introduction erials, and dental laboratories are exposed to different types of pathogenic microorganisms. impression material. Mechanical mixing of alginate ensures that Selection of impression tray alginate mix is the same each time they are mixed. Of particular interest has been the effect of disinfection solutions on the “disinfection” of dental impressions [4]. Material incompatibilities and impression disposal 20 3.6. for use, time, and level of disinfection required. In an in-vitro study Lu JX et al.11 found no dimension deformation on the Silicone rubber, Irreversible Effect of disinfection on dental impression materials is con-troversial. Because of their material proprieties and handling ... dental– stone interactions, disinfection properties and consequences, dimensional stability, shelf life, color, odor, taste, availability, and clean-up characteristics may contribute to material selection. However, it has been shown that washing impression materials with water alone removes as little as 40% of bacteria, viruses and fungi5 and therefore is totally inadequate as a means to reduce potential infection did a PubMed search between 1980 and 2005 on the effect of chemical disinfection, by immersions or spraying, on the impression’s dimensional changes. After disinfection, rinse impression well … Introduction . After these steps, the specimens were submitted to different situations: 1. Overview of material types and consistencies according to ISO 4823:2000 21 ... Disinfection 44 9. SCIENTIFIC Disinfection of irreversible hydrocolloid impression material with chlorinated compounds SADJ June 2009, Vol 64 no 5 p208 - p212 I H Rweyendela: BDS, MScDent. The aim of this study was to investigate the effect of three different types of disinfectant agents on alginate impression material after 5 and 10 minutes. Disinfection. Keywords: Disinfection materials, alginate impression, spray method 1. All commercial water-based disinfectants indicated for dental impression materials can be used. Both impression and base were rinsed in running water for 15 seconds and air-dried. Impression materials for preliminary impressions 19 3.5. In one study, while comparing UV rays disinfection with addition silicone impression material whereas spraying with chlorine compound was advocated for disinfection of polyether impression material for 2-3 min.35 UV rays can be used for disinfection of water supplies, laboratory equipment, dental headpieces, dental impression and implants. The ZOE and compound impressions Follow the manufacturer’s instructions . Fabrication of the stone model 46 10.1. c/o Department of Prosthodon cs, School of Oral Health Sciences, University of the Witwatersrand, Johannesburg. Phenols with a high alcohol content, for example, can desiccate some impression materials. Glutaraldehyde solutions are recommended for disinfection. In this in vitro experimental study, 66 circular samples of alginate impression material were contaminated with Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans fungus. 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