Lins, Ruthineia Diógenes Alves UchoaMendonça, Angélica Kercya Pereira de2018-01-222018-01-222017-07-25MENDONÇA, Angélica Kercya Pereira de. Ação antimicrobiana dos extratos de Turnera ulmifolia linn e Passiflora edulis flavicarpa degener frente a bactérias bucais do gênero Streptococcus e microrganismos superinfectantes. 2017. 56f. Dissertação (Mestrado em Saúde Coletiva) - Centro de Ciências da Saúde, Universidade Federal do Rio Grande do Norte, Natal, 2017.https://repositorio.ufrn.br/jspui/handle/123456789/24611The chemical control of the dental biofilm and the planktonic microbiota acts as a coadjuvant of the mechanical control for maintenance and / or restoration of oral health. In this context, phytotherapics emerge with the purpose of acting as antimicrobial agents in the oral cavity. Therefore, the present study aimed to evaluate the antimicrobial action of leaf and root extracts of Turnera ulmifolia Linn (Chanana) and the leaf of the Passiflora edulis Flavicarpa Degener (yellow passion fruit) against bacteria of the genus Streptococcus mutans, Streptococcus oralis and Streptococcus sanguinis and superinfecting microorganisms (Pseudomonas aeruginosa and Enterococcus faecalis) from the oral environment. For this purpose, the Minimal Inhibitory Concentration (MIC), Minimum Inhibitory Adhesion Concentration (MIAC) and Bactericidal Kinetics of the mentioned extracts were investigated using 0,12% chlorhexidine digluconate as the control. As regards the bacterial growth inhibitory activity of the extracts investigated, it was verified that, in relation to Streptococcus mutans, Turnera ulmifolia Linn leaf extract was statistically superior to the others (p<0,05), in relation to Streptococcus oralis and Streptococcus sanguinis, was the extract of the leaf of the Passiflora edulis Flavicarpa Degener that showed results with statistical significance (p<0,05) and in front of the superinfecting microorganisms, was the root extract of Turnera ulmifolia Linn that presented the best results (p<0,05). These plant extracts showed varied inhibition halos, presenting up to 22mm in diameter. Regarding the anti-adherence effect, all the extracts tested showed positive results at different dilutions for all the microorganisms studied, with emphasis only on the non-stick effect of Passiflora edulis Flavicarpa Degener leaf extract against Streptococcus oralis and Streptococcus sanguinis. Regarding Bactericidal Kinetics, the crude and diluted extracts tested did not demonstrate bacterial growth inhibitory activity after 4 hours of contact with any of the microorganisms in the study. However, the chlorhexidine digluconate 0,12% was more effective than all the extracts for all tests, except for the non-stick effect of Passiflora edulis Flavicarpa Degener leaf extract front of Streptococcus oralis and Streptococcus sanguinis, and those higher than the 0,12% chlorhexidine digluconate. Therefore, it is concluded that plant extracts presents inhibitory activity of bacterial growth, non-stick effect and bactericidal potential lower than the 0,12% compared chlorhexidine gluconate to all microorganisms studied, except only to the non-stick effect of the extract of Passiflora edulis Flavicarpa Degener with respect to Streptococcus oralis and Streptococcus sanguinis which appears to be superior to that of the 0,12% chlorhexidine digluconate for the investigated extracts.Acesso AbertoFitoterapiaMicrobiologiaBiofilme dentáriomasterThesisCNPQ::CIENCIAS DA SAUDE::SAUDE COLETIVA