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1.
RSBO (Impr.) ; 9(2): 143-150, Apr.-Jun. 2012. ilus, tab
Article Dans Anglais | LILACS | ID: lil-748104

Résumé

Objective: This study evaluated the antimicrobial efficacy of 2.5% and 5.25% NaOCl, 2% gel and liquid CHX and MTAD® against Enterococcus faecalis biofilms on human dentin. Material and methods: E. faecalis biofilms grown on dentin matrix of 216 root sections were submerged in test irrigants for 1, 5, 15 and 30 minutes. The antimicrobial activity of the test irrigants were assessed through CFU counts. Biofilm formation over the dentin surface was ensured by SEM analysis.Results: Results showed no statistic difference among CHX gel, 2.5% and 5.25% NaOCl. However, the CHX liquid and MTAD were less effective than 2.5% and 5.25% NaOCl. Only CHX liquid and MTAD had differences in its efficacy depending on the time.Conclusion: The most effective irrigants in eliminating E. faecalis biofilms were 2.5% and 5.25% NaOCl and 2% CHX gel, at all the tested time intervals, in comparison to CHX liquid and MTAD.

2.
Rev. bras. odontol ; 65(1): 52-56, jan.-jun. 2008. tab, ilus
Article Dans Portugais | LILACS, BBO | ID: lil-541699

Résumé

Este estudo avaliou a atividade antimicrobiana in vitro de três dentifrícios infantis, sendo um sem fluoreto, um contendo 500 e outro 1100 ppm de NaF. Os microorganismos utilizados foram: S. aureus (S.a), S. mutans (S.m), E feacalis (E.f), E. coli (E.c). empregou-se a Concentração Inibitória Mínima (MIC) e diluições seriadas (1:2 a 1:128). Não se observou atividade antimicrobiana para o dentifrício sem fluoreto. As diluições correspondentes às MICs dos dentifrícios contendo 500 e 1100 ppm de NaF foram, respectivamente: S.a (4,4), E.f (64,128), S.m (4,8) e E.c (2,2). Concluiu-se que o dentifrício sem fluoreto não apresentou atividade antimicrobiana e que os dentifrícios contendo fluoreto apresentaram MICs similares e atividade antimicrobiana para todos os microorganismos.


Sujets)
Composés du fluor/normes , Dentifrices/normes , Techniques in vitro , Tests de sensibilité microbienne
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