Análise das propriedades estruturais da resina acrílica termopolimerizável de próteses dentárias removíveis após escovação simulada com dentifrício à base de própolis vermelha

Abstract

Candida albicans is the main etiological agent of Prosthetic Stomatitis (PE), also known as Chronic Atrophic Candidiasis, characterized by inflammation of the oral mucosa underlying dental prostheses (PDRs), and proper hygiene is essential to prevent onset of such pathology. The significant toxicity of conventional antifungals has made natural products an alternative in the fight against pathogenic microorganisms. Among these products stands out propolis, which has been used since ancient times for medicinal purposes and most recently in the food, beverage, cosmetic, mouthwash and toothpaste industry. In spite of the effective antimicrobial action of propolis proven in the literature, still in vitro studies on the effects of the use of these substances on the acrylic resin of the PDRs are lacking. In this way, it was interesting to verify the possible effects of mechanical brushing with the associated use of dentifrice of incorporated with the Brazilian Red Propolis at 1% (BRP) on the mass, surface roughness and color change of the thermo-polymerizable acrylic resin used for preparation of PDRs bases, for a simulated period of one year. Thirty specimens were randomly assigned to three groups: Distilled Water (AD), Dentifrice based on Red Propolis (DP) and Common Dentifrice (DC). Data were submitted to the Kolmogorov-Smirnov normality test, expressed as mean and standard error of the mean and compared by the Wilcoxon or Kruskal-Wallis / Dunn test (GraphPad Prism 5.0, p<0.05). The simulated brushing of thermopolymerizable acrylic resin specimens composing the PDRs with 1% BRP based dentifrice for a period of one year did not cause significant changes in mass, roughness or color when compared to the other groups. However, further in vivo and in vitro studies should be performed to assess their long-term use and ensure their indication in the PDRs sanitation.