Radka Vrbova
General University Hospital in Prague & Charles University, Czech Republic
Title: The study of the effect of disinfectants on the properties of impression materials and gypsum casts using different imaging methods
Biography
Biography: Radka Vrbova
Abstract
Statement of the problem: The disinfection of dental impressions is currently a necessary step before further processing in dental laboratories. However, the disinfection of impression materials can lead to the deterioration of their surface properties with negative impact on the quality of the resulting prosthetic work.
Objectives: The purpose of this study is to compare the effect of several commercially available disinfectants on the accuracy of various types of dental impression materials and their compatibility with gypsum including surface quality and structure evaluation.
Material & Methods: In this study alginate (Alligat fast set, Elastic Cromo, Kromopan, Phase Plus) and elastomeric (Variotime Medium Flow, Xantropen L blue, Impregum Soft) dental impression materials in combination with four disinfectants (Aseptoprint Liquid, Zeta 7 solution, Silosept, Dentaclean Form) and gypsum type 3 (Mramorit Blue) and type 4 (BegoStone plus) were tested. The dimensional changes were measured and the detail reproduction, compatibility with gypsum including observation of surface quality and surface structure were evaluated using three imaging methods - light microscopy, scanning electron microscopy (SEM) and micro computed tomography (micro-CT). The results were statistically analyzed using Statistica 12 software (StatSoft Inc.).
Findings: Dimensional changes after disinfection were higher in alginate materials (even over 1%) for some combination of impression material /disinfectant. All imaging methods proved that the detail reproduction, surface quality and compatibility with gypsum of the tested alginate impression materials were most negatively influenced by disinfectant Dentaclean Form. The surface quality of tested elastomeric impression materials remained unchanged after disinfection. It was confirmed that the desired properties of impressions may be negatively affected by disinfectants, particularly in the case of alginate materials, and that the effect of disinfectants is very individual.
Recent Publications
1. Poulis N, Prombonas A, Yannikakis S, Karampotsos T, Katsarou M and Drakoulis N (2016) Preliminary SEM observations on the surface of elastomeric impression materials after immersion or ozone disinfection. Journal of Clinical and Diagnostic Research 10(12): ZC01-ZC05.
2. Sinobad T, Obradovic-Djuricic K, Nikolic Z, Dodic S, Lazic V, Sinobad V and Jesenko-Rokvic A (2014) The effect of disinfectants on dimensional stability of addition and condensation silicone impressions. Vojnosanitetski pregled 71(3):251-258.
3. Shetty S, Kamat G and Shetty R (2013) Wettability changes in polyether impression materials subjected to immersion disinfection. Dental Research Journal (Isfahan) 10(4):539-544.
4. Correia-Sousa J, Tabaio A M, Silva A, Pereira T, Sampaio-Maia B and Vasconcelos M (2013) The effect of water and sodium hypochlorite disinfection on alginate impressions. Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial 54(1):8-12.