Study of CS essential oil and Formulation of mouthwash. Chemical characterization, cytotoxicity, and antimicrobial potentia, effect on the properties of Dental Materials aesthetic.

Author(s)

Ana Paula Terossi de Godoi

• Document type: Doctoral Thesis
• Press: Ribeirão Preto.
• Institution: Universidade de São Paulo (USP). Faculdade de Odontologia de Ribeirão Preto (PCARP/BC)
• Defense date: 2013-07-05

Examining board members

Alma Blasida Concepcion Elizaur Benitez Catirse; Rosehelene Marotta Araújo; Carlos Alberto dos Santos Cruz; Niege Araçari Jacometti Cardoso Furtado; Denise Cerqueira Oliveira

• Advisor: Alma Blasida Concepcion Elizaur Benitez Catirse; Niege Araçari Jacometti Cardoso Furtado

Abstract

Researches has been developed associating dental material and mouthwashes, due to the side effects caused presenting in the products, especially chlorhexidine (CHX). Therefore, it becomes necessary studies involving alternative solutions containing the CHX efficacy, but without its collateral effects. Regarding to this, it was studied the specie Casearia sylvestris (CS), a medicinal plant with confirmed benefits, although its effect on dental materials (DM) it is poorly studied (described, talvez fique melhor) and its antimicrobial potencial and cytotoxicity remains controversial. The aim of this study was to evaluate the biological properties of CS essential oil and its effect on DM. The CS essential oil was obtained and characterized through gas chromatography coupled to mass spectrometry (GC-MS). The minimum inhibitory concentration and minimum bactericidal concentration values were determined using the microdilution of Streptococcus species (mutans, mitis, salivarius and sanguinis) and Enterococcus faecalis. It was also evaluated the cytotoxicity on mouse fibroblasts of both essential oil and mouthwash formulation containing the bioactive essential oil. To the superficial roughness, color, superficial microhardness and surface qualitative analysis (Scanning electron microscope SEM) of DM submitted to studied solutions, it was prepared 60 specimens (n = 10), 30 of each DM (composite resin, resin modified glass ionomer- CIV), which were subdivided into 3 groups to the submission: G1 - CHX, G2 - mouthwash containing CS essential oil and G3 - distilled water. The lectures were performed with appropriate equipaments(apparatus, acho que fica melhor): posteriorly specimens polishing and 24h after the experimental period end. The obtained results were evaluated according to the classical statistics concepts, after data exploratory analysis. The yield of essential oil obtained was 0.85 mL/100 g dried leaves; the major constituents detected and identified in the essential oil were β-caryophyllene, germacrene-D, bicyclogermacrene, δ- cadideno, caryophyllene oxide, α-and spathulenol elemol; both mouthrinse containing essential oil as the formulation developed showed significant antimicrobial activity against the tested microorganisms, except Enterococcus faecalis; the different concentrations tested of the essential oil and the mouthwash formulation showed statistically lower cytotoxicity against gingival fibroblasts L929 than CHX; cytotoxicity essential oil is time-dependent; the formulation provided higher color change to resin Z250 when compared with CHX and distilled water, and this change occurred in the factor time of all color parameters (L *, a * and b *) when analyzed alone, while to CIV color the difference was not statistically significant for the different solutions studied, there was a statistically significant increase in CIV surface roughness when submitted to CHX, while to composite resin the difference was not statistically significant; there was no statistically significant difference in microhardness of both restorative materials tested, and SEM showed surface deterioration mostly in the specimens submitted to CHX. (AU)

• FAPESP's process: 11/23866-8 - Cytotoxicity and antimicrobial potential of essential oil of Casearia Sylvestris and effect of mouthwash formulation with bioactive essential oil on properties of dental restorative materials.
• Grantee: Ana Paula Terossi de Godoi
• Support Opportunities: Scholarships in Brazil - Doctorate