Determinação da composição química e da atividade antimicrobiana de Rosmarinus officinalis Linn avaliando o potencial para preparação de enxaguatório bucal

Abstract

Rosmarinus officinalis, which belongs to the Lamiaceae family, is a pattern of medicinal flora that has therapeutic properties attributed to the synergism of its chemical constituents. It is highlighted its activities in antihypertensive, digestive, hypoglycemic, enzyme acetylcholinesterase inhibitor and α-amylase and antimicrobial against fungi and bacteria. The biological characteristics of the extract of R. officinalis have been extensively researched, resulting in the confirmation of its inhibitory efficacy compared to oral microbiota. The objective of this research was to develop an herbal mouthwash solution containing the plant extract, evaluating its antimicrobial efficacy. Tests were performed to determine total phenol and flavonoid in extracts of R. officinalis, by spectrophotometric methods. The nonstick action was evaluated by Minimum Inhibitory Concentration of Adherence. Solutions containing sodium benzoate, saccharine, propylene glycol, disodium EDTA and mint essential oil were formulated. Concentrations for the extracts tested were 0.1, 5 and 10% of the ethanol extract of R. officinalis; and 0.05, 5 and 10% of the hexane fraction of R. officinalis. In order to evaluate the synergism, ethanol extract and hexane fraction were also added to formulations containing 0.05% Sodium Fluoride and 0.12% Chlorhexidine Diguclonato. As a white control was used mouthwash formulation without the addition of the R. officinalis extract, and as positive control the 0.12% Chlorhexidine. In these formulations was assessed the inhibitory effect against S. mutans (ATCC 25175) and C. albicans (ATCC 10231), using the agar diffusion method. Results revealed the presence of antimicrobial activity against S. Mutans and C. albicans in all concentrations of plant extract. The lowest concentration that prevented the adherence of S. mutans was 6.25 mg/mL. Among the solutions tested, it was observed a higher sensitivity of S. mutans in the presence of mouthwash solution with 5% ethanol extract and 0.05% sodium fluoride, and in the presence of the mouthwash solution with hexane fraction at 10% tested wuth to C. albicans. Therefore, the formulation of the mouthwash proposed in this research has shown antimicrobial activity.