Physicochemical properties, labeling and antimicrobial activity of mouthwashes for children
DOI:
https://doi.org/10.15448/1980-6523.2015.1.10932Keywords:
Mouthwashes, Hydrogen-Ion Concentration, MicrobiologyAbstract
Objective: To analyze the physicochemical properties, labeling and antimicrobial activity of mouthwashes for children against oral biofilm microorganisms.
Material and Methods: We selected a total of eight brands of mouthwashes and used distilled water and chlorhexidine as negative and positive controls, respectively. The packages were analyzed by direct observation. The assessment of pH, ºBrix and kinematic viscosity was carried out using a digital pHmeter, specific field refractometer and capillary viscometer, respectively. For this study, we used strains of Streptococcus oralis, Streptococcus mutans, Streptococcus salivarius and Lactobacillus acidophilus, which were reactivated in BHI and plated on blood agar. Susceptibility tests were made by the agar diffusion method, followed by incubation at 37 ºC for 48 hours.
Results: The pH, ºBrix and viscosity values ranged from 4.89 to 7.23, 2.8 to 20.0, and 1.47 mm²/s to 2.73 mm²/s, respectively. Chlorhexidine was found to show the largest zones of inhibition against S. salivarius and L. acidophilus. This effect was observed for the mouthwashes against S. oralis and S. mutans.
Conclusion: The mouthwashes for children tested herein were found to show a neutral or close to neutral pH, presence of soluble solids in their composition and little variation of viscosity. These products proved to show antimicrobial activity on the microorganisms tested, excepting one of the mouthwashes, which showed no effect on S. mutans.
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