Phytochemical composition and in vitro screening of the antimicrobial activity of essential oils on oral pathogenic bacteria.

Phytochemical composition and in vitro screening of the antimicrobial activity of essential oils on oral pathogenic bacteria.

Author Information

Tardugno R1, Pellati F1, Iseppi R1, Bondi M1, Bruzzesi G12, Benvenuti S1

1a Department of Life Sciences , University of Modena and Reggio Emilia , Modena , Italy.

2b Department of Surgical, Medical, Dental and Morphological Sciences with Interest Transplant, Oncological and Regenerative Medicine , University of Modena and Reggio Emilia , Modena , Italy.

Abstract

In this study, the activity of essential oils (EOs) against microorganisms involved in oral diseases was evaluated. Fourteen EOs were selected and subjected to gas chromatographic analysis, including Illicium verum, Eucaliptus globulus, Eugenia caryophyllata, Leptospermum scoparium, Mentha arvensis, Mentha piperita, Myrtus communis, Salvia officinalis, Melaleuca alternifolia, Rosmarinus officinalis, Lavandula x intermedia, Thymus capitatus and Thymus vulgaris. These EOs were tested for their antimicrobial activity on Streptococcus mutans and Lactobacillus species clinically isolated from dental surgery patients. The antibacterial activity was evaluated by means of the disc diffusion and the minimum inhibitory concentration (MIC). Five EOs, having shown an interesting antimicrobial activity, were selected for a second screening in combination between them and with chlorhexidine. From the second assays, two EO-EO and three EO-chlorhexidine associations gave interesting results as potential constituents of mouthwashes, especially for the contribution of oxygenated monoterpenes, including menthol, thymol, and carvacrol.

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