2015-06-172014-02-28MARTINS, Elisa Graças. Análise comparativa de microdureza e rugosidade superficial das resinas de bases de prótese total após os ciclos de desinfecção em soluções químicas. 2014. 74 f. Dissertação (Mestrado em Ciências Odontológicas) - Universidade Federal de Alfenas, Alfenas, MG, 2014.https://repositorio.unifal-mg.edu.br/handle/123456789/409The mechanical and chemical hygienization of complete denture bases aims at preventing several diseases, such as candidiasis. However, chemical hygienization can damage the structure of denture bases. Therefore, mechanical and chemical hygienization methods should be prioritized. The use of chemicals can damage the structure of the denture base when immersed at certain concentrations, for a long immersion period or even if immersed many times. So, this study has assessed, by means of microhardness and superficial rugosity tests, specimens of acrylic resin VipiCril® (thermally polymerized resin) and Bosworth New Truliner® (self-polymerized resin), before and after the immersion in solutions of 0.12% chlorhexidine digluconate, 1% sodium hypochlorite, Corega® Tabs and water (control). For such purpose, 60 specimens of resin VipiCril (thermally polymerized) and 60 specimens of resin Bosworth New Truliner® (self-polymerized) measuring 16 mm of diameter and 6 mm of height were prepared and randomly divided into four groups of 15 specimens each, undergoing Knoop microhardness tests (KHN) and superficial rugosity (Ra) tests, before and after cycles of immersion in solutions of 0.12% chlorhexidine digluconate, 1% sodium hypochlorite, Corega Tabs® and water (control). It was noticed the decrease of microhardness in the groups of 0.12% chlorhexidine, Corega Tabs® and water in the specimens of resins VipiCril and Bosworth. Also, observing the superficial rugosity it is possible to notice the increased rugosity in the 0.12% chlorhexidine solution. It can be concluded that the 1% sodium hypochlorite solution caused least rugosity to the denture base structure, not resulting in decrease of the superficial microhardness. However, disinfecting solutions lead to increased rugosity of resin VipiCril, and only the 0.12% chlorhexidine solution resulted in increased rugosity of resin Bosworth.application/pdfAcesso Abertohttp://creativecommons.org/licenses/by-nc-nd/4.0/Protese dentariaDesinfecçãoResinas acríllicasCIENCIAS DA SAUDE::ODONTOLOGIADissertaçãoMoretti Neto, Rafael Tobias