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Acrylic resin disinfection by peracetic acid and microwave energy

Avaliação da efetividade do ácido peracético e da irradiação por microondas na desinfecção de resina acrílica

Carmen Beatriz Borges FORTES Vicente Castelo Branco LEITUNE Fabrício Mezzomo COLLARES Nélio Bairros DORNELLES JUNIOR Stéfani Becker RODRIGUES Susana Werner SAMUEL Cesar Liberato PETZHOLD Valter STEFANI About the authors


The objective of this study was to evaluate the effectiveness of disinfection methods in microwave and immersion in peracetic acid in heat-cured, self-cured and microwave-cured acrylic resin, contaminated with Candida albicans.


Five specimens were prepared for each type of acrylic resin. All were infected with Candida Albicans, incubated at 37°C for 24 hours. The group which underwent microwave energy was irradiated with a power of 840W for 1 minute and the other group underwent disinfection by soaking of 0.2% peracetic acid for 5 minutes.


All samples proved to be contaminated after the incubation period. After the different processes of disinfection, both immersion in 0.2% peracetic acid as microwave irradiation were effective in disinfection of the 3 types of acrylic resins contaminated by Candida Albicans.


Concluded that soaking in 0,2% peracetic acid for 5 minutes with microwave irradiation power 840W for 1 minute are effective methods for disinfecting heat-cured acrylic resin, self-cured acrylic resin and microwave-cured acrylic resin, contaminated with Candida Albicans.

Acrylic resins; Microwaves; Peracetic acid

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