Eficácia da atividade antimicrobiana de diferentes colutórios bucais sobre Streptococcus mutans: Estudo in vitro

O objetivo deste trabalho foi avaliar a eficacia antimicrobiana in vitro de quatro antissepticos bucais comumente encontrados no mercado nacional em cepas de Streptococcus mutans (S.mutans), principal patogeno responsavel pela doenca carie. As solucoes testadas foram clorexidina, triclosan, cloreto de cetilpiridinio e solucao de oleos essenciais, bem como uma solucao de controle negativo. As cepas foram semeadas em cinco placas de petri; cada uma destas recebeu discos de papel embebidos nas solucoes testadas. As placas foram incubadas em anaerobiose, e os halos de inibicao gerados pelos discos foram medidos. O bochecho a base de triclosan foi o mais eficaz na inibicao in vitro do S.mutans, seguido pelo cloreto de cetilpiridinio e pela clorexidina. O bochecho a base de oleos essenciais nao foi capaz de criar halo de inibicao algum. Os bochechos contendo triclosan se mostraram ser uma excelente alternativa como coadjuvantes na prevencao e tratamento da doenca carie. The aim of this study was to assess the in vitro antimicrobial effectiveness of four mouth rinses commonly found in the national market in standard strains of Streptococcus mutans (S.mutans), the main pathogenic agent responsible for caries disease. The tested solutions were chlorhexidine, triclosan, cetylpyridinium chloride and essential oils based solutions, as well as a negative control solution. The strains were placed on five petri plates; each one received paper discs containing the test solutions. The plates were incubated in anaerobic conditions and the inhibition halos produced by the discs were measured. The mouth rinse containing triclosan was the most effective in inhibiting the Streptococcus mutans in vitro, followed by cetylpyridinium chloride and chlorhexidine. The essential oil-based solutions were not capable of creating any inhibition halo. It is possible to accomplish that mouth rinses containing triclosan are an excellent choice in assisting caries disease prevention and treatment.