Avaliação da ação antimicrobiana dos cimentos endodônticos pós presa, após o uso de hidróxido de cálcio sobre biofilme de Enterococcus faecalis / Evaluation of the antimicrobial action of endodontic sealers after setting, after use of calcium hydroxide on Enterococcus faecalis biofilm

O presente estudo teve como objetivo avaliar a atividade antimicrobiana dos cimentos endodônticos, com ou sem associação do uso prévio de hidróxido de cálcio em um modelo "in vitro" de biofilme. Espécimes de dentina bovina (240) foram colocadas e deixas em contato direto com inoculo de E. faecalis (ATCC 51299) por 14 dias, para induzir a formação do biofilme. Em seguida, metade das espécimes foram incubadas (37°C e 5% CO2 ) em contato com um dos seguintes cimentos: AH Plus, Acroseal e Sealapex por 2, 7 e 14 dias, e a outra metade foi tratada com solução de hidróxido de cálcio por 14 dias e incubada em contato com os cimentos AH Plus, Acroseal e Sealapex por 2, 7 e 14 dias. Cada grupo continha um n = 8. Após cada período experimental, as amostras foram agitadas e as suspensões formadas foram diluídas em série e triplamente plaqueadas em ágar m-Enterococcus. As unidades formadoras de colônias foram contadas, e os dados foram analisados estatisticamente usando os testes one-way ANOVA, Shapiro-Wilk e Kruskal-Wallis (p<0,05) para determinar o potencial antimicrobiano. Foi observada diferença estatisticamente significante entre os grupos com e sem o tratamento com Hidróxido de Cálcio, para todos os cimentos avaliados. Entretanto, nenhum dos cimentos testados foi capaz de eliminar completamente o biofilme. Ao comparar os cimentos, Sealapex reduziu E. faecalis após 7 dias, enquanto AH Plus e Acroseal mostraram atividade antimicrobiana apenas no 14º dia experimental. Em conclusão, o uso prévio de hidróxido de cálcio ajudou a diminuir o biofilme de Enterococcus faecalis dos cimentos estudados em todos os tempos experimentais(AU)

The present study aimed at evaluating the antimicrobial activity of endodontic sealers, with or without prior use association of calcium hydroxide in an in vitro biofilm model. Bovine dentin specimens (240) were placed and left in contact with inoculum of E. faecalis (ATCC 51299) for 14 days, to induce biofilm formation. Then, half of the specimens were incubated (37°C and 5% CO2) in contact with one of the following sealers AH Plus, Acroseal and Sealapex for 2, 7 and 14 days, and the other half were treated with calcium hydroxide solution for 14 days, and then incubated in contact with the sealers AH Plus, Acroseal and Sealapex for 2, 7 and 14 days. Each group comprised a n=8. After each experimental time the samples were agitated, and the suspensions formed were serially diluted, and triple plated onto m-Enterococcus agar. Colony forming units were counted, and the data were statistically analyzed using ANOVA, Shapiro-Wilk and Kruskal-Wallis one-way tests (p<0.05) to determine antimicrobial potential. A statistically significant difference was observed between the groups with and without the treatment with Calcium Hydroxide, for all sealers evaluated. However, neither of the sealers tested were able to completely eliminate the biofilm. When comparing the sealers, Sealapex reduced E. faecalis after 7 days, while AH Plus and Acroseal showed antimicrobial activity only on the 14th experimental day. In conclusion, previous use of calcium hydroxide helped to decrease Enterococcus faecalis biofilm of the sealers studied in all experimental times(AU)

Antimicrobial action of calcium hydroxide-based endodontic sealers after setting, against E. faecalis biofilm.

Enterococcus faecalis are gram positive bacteria that can mostly resist endodontic therapy, inducing persistent infection in the root canal system. Endodontic sealers with antimicrobial activity may help eliminate residual microorganisms that survive endodontic treatment. The present study aimed at comparing the antimicrobial activity of Acroseal, Sealapex and AH Plus endodontic sealers in an in vitro biofilm model. Bovine dentin specimens (144) were prepared, and twelve blocks for each sealer and each experimental time point (2, 7 and 14 days) were placed and left in contact with plates containing inoculum of E. faecalis (ATCC 51299), to induce biofilm formation. After 14 days, the samples were transferred to another plate with test sealers and kept at 37°C and 5% CO2 for 2, 7 and 14 days. The specimens without sealers were used as a control for each period. The samples were agitated in a sonicator after each experiment. The suspensions were agitated in a vortex mixer, serially diluted in saline, and triple plated onto m-Enterococcus agar. Colonyforming units were counted, and the data were statistically analyzed using ANOVA, Shapiro-Wilk and Kruskal-Wallis one-way tests (p < 0.05) to determine antimicrobial potential. Sealapex showed significant differences at all the experimental time points, in comparison with all the other groups. AH Plus and Acroseal showed antimicrobial activity only on the 14th experimental day. Neither of the sealers tested were able to completely eliminate the biofilm. Sealapex showed the highest antimicrobial activity in all the experimental periods. The antimicrobial activity of all the sealers analyzed increased over time.

Antimicrobial action of calcium hydroxide-based endodontic sealers after setting, against E. faecalis biofilm

Abstract Enterococcus faecalis are gram positive bacteria that can mostly resist endodontic therapy, inducing persistent infection in the root canal system. Endodontic sealers with antimicrobial activity may help eliminate residual microorganisms that survive endodontic treatment. The present study aimed at comparing the antimicrobial activity of Acroseal, Sealapex and AH Plus endodontic sealers in an in vitro biofilm model. Bovine dentin specimens (144) were prepared, and twelve blocks for each sealer and each experimental time point (2, 7 and 14 days) were placed and left in contact with plates containing inoculum of E. faecalis (ATCC 51299), to induce biofilm formation. After 14 days, the samples were transferred to another plate with test sealers and kept at 37°C and 5% CO2 for 2, 7 and 14 days. The specimens without sealers were used as a control for each period. The samples were agitated in a sonicator after each experiment. The suspensions were agitated in a vortex mixer, serially diluted in saline, and triple plated onto m-Enterococcus agar. Colonyforming units were counted, and the data were statistically analyzed using ANOVA, Shapiro-Wilk and Kruskal-Wallis one-way tests (p < 0.05) to determine antimicrobial potential. Sealapex showed significant differences at all the experimental time points, in comparison with all the other groups. AH Plus and Acroseal showed antimicrobial activity only on the 14th experimental day. Neither of the sealers tested were able to completely eliminate the biofilm. Sealapex showed the highest antimicrobial activity in all the experimental periods. The antimicrobial activity of all the sealers analyzed increased over time.

Análise comparativa da ação antimicrobiana dos cimentos endodônticos Acroseal, Sealapex e AH plus pós presa em biofilme de enterococcus faecalis / Comparative analysis of the antimicrobial action of endodontic sealer Acroseal, Sealapex and AH Plus setting against Enterococcus faecalis biofilm

Enterococcus faecalis é uma bactéria Gram-positiva que pode resistir ao tratamento endodôntico e manter a infecção presente no sistema de canais radiculares. Assim, o uso de cimentos endodônticos com atividade antimicrobiana pode ajudar a eliminar microrganismo residuais que sobreviveram após o tratamento endodôntico. Diante dessa realidade, o presente estudo teve por objetivo avaliar comparativamente a ação antimicrobiana dos cimentos endodônticos Acroseal, Sealapex e AH Plus em um modelo de biofilme in vitro. Para a realização do estudo foram confeccionados 144 espécimes de dentina bovina, sendo doze blocos para cada cimento em cada tempo experimental que permaneceram em placas contendo meio de cultura inoculado com E. faecalis (ATCC 51299) para permitir a formação de biofilme. Decorrido 14 dias, os espécimes foram transferidos para outra placa onde discos dos cimentos testados foram colocados sobre o biofilme formado. As placas de cultura foram deixadas em estufa a 37°C e 5% de CO2 por 2, 7 e 14 dias. Espécimes sem aplicação dos cimentos foram utilizados como controle para cada período. Após cada tempo experimental, as amostras foram agitados em sonicador. As suspensões foram agitadas em vortex e foi realizada uma diluição seriada decimal em solução salina, sendo estas diluições plaqueadas em triplicata em meio de cultura m-Enterococcus ágar. As unidades formadoras de colônia foram contadas e os dados analisados estatisticamente usando os teste ANOVA, Shapiro-Wilk e Kruskal-Wallis one-way (p<0,05) para determinação do potencial antimicrobiano. Resultados: O Sealapex apresentou diferença estatística em todos os tempos experimentais quando comparado com os demais grupos. O AH Plus e o Acroseal mostraram atividade antimicroabina apenas no 14o dia de experimento. Conclusão: Nenhum dos cimentos testados pós presa, foi capaz de eliminar o biofilme. O Sealapex mostrou maior atividade antimicrobiana em todos os períodos experimentais. Em todos os cimentos...

Enterococcus faecalis is a gram positive bacteria that can resist to the endodontic therapy and maintain the infection present in the root canal system. Therefore, the use of endodontic sealers with antimicrobial activity could help to eliminate residual microorganism that have survived after endodontic treatment. The present study aimed to compare the antimicrobial activity of the endodontic sealers Acroseal, Sealapex and AH Plus in vitro biofilm model. It were prepared 144 bovine dentin specimens, twelve blocks for each cement in each experimental time that remained in plates containing culture medium inoculated with E. faecalis (ATCC 51299) for biofilm formation. After 14 days, the samples were transferred to another plate with test sealers and were kept at 37oC and 5% CO2 for 2, 7 and 14 days. Specimens without sealers were used as a control for each period. After each experimental, the samples were agitated in sonicator. The suspensions were agitated in vortex and serially diluted in saline and triple plaqued in m-Enterococcus agar. Colony forming unit were counted and the data were statistically analyzed using ANOVA, Shapiro-Wilk and Kruskal-Wallis one-way test (p<0.05) for the antimicrobial potential determination. Results: Sealapex showed significant difference in all experimental times in comparison to all other groups. AH Plus and Acroseal showed antimicrobial activity just at 14th experimental day. Conclusion: Neither of sealers setting tested was able to remove biofilm . The Sealapex showed higher antimicrobial activity in all experimental periods. All sealers examined the antimicrobial effectiveness was higher with over time...

Análise comparativa da ação antimicrobiana dos cimentos endodônticos Acroseal, Sealapex e AH plus pós presa em biofilme de enterococcus faecalis / Comparative analysis of the antimicrobial action of endodontic sealer Acroseal, Sealapex and AH Plus setting against Enterococcus faecalis biofilm

Enterococcus faecalis é uma bactéria Gram-positiva que pode resistir ao tratamento endodôntico e manter a infecção presente no sistema de canais radiculares. Assim, o uso de cimentos endodônticos com atividade antimicrobiana pode ajudar a eliminar microrganismo residuais que sobreviveram após o tratamento endodôntico. Diante dessa realidade, o presente estudo teve por objetivo avaliar comparativamente a ação antimicrobiana dos cimentos endodônticos Acroseal, Sealapex e AH Plus em um modelo de biofilme in vitro. Para a realização do estudo foram confeccionados 144 espécimes de dentina bovina, sendo doze blocos para cada cimento em cada tempo experimental que permaneceram em placas contendo meio de cultura inoculado com E. faecalis (ATCC 51299) para permitir a formação de biofilme. Decorrido 14 dias, os espécimes foram transferidos para outra placa onde discos dos cimentos testados foram colocados sobre o biofilme formado. As placas de cultura foram deixadas em estufa a 37°C e 5% de CO2 por 2, 7 e 14 dias. Espécimes sem aplicação dos cimentos foram utilizados como controle para cada período. Após cada tempo experimental, as amostras foram agitados em sonicador. As suspensões foram agitadas em vortex e foi realizada uma diluição seriada decimal em solução salina, sendo estas diluições plaqueadas em triplicata em meio de cultura m-Enterococcus ágar. As unidades formadoras de colônia foram contadas e os dados analisados estatisticamente usando os teste ANOVA, Shapiro-Wilk e Kruskal-Wallis one-way (p<0,05) para determinação do potencial antimicrobiano. Resultados: O Sealapex apresentou diferença estatística em todos os tempos experimentais quando comparado com os demais grupos. O AH Plus e o Acroseal mostraram atividade antimicroabina apenas no 14o dia de experimento. Conclusão: Nenhum dos cimentos testados pós presa, foi capaz de eliminar o biofilme. O Sealapex mostrou maior atividade antimicrobiana em todos os períodos experimentais. Em todos os cimentos...

Enterococcus faecalis is a gram positive bacteria that can resist to the endodontic therapy and maintain the infection present in the root canal system. Therefore, the use of endodontic sealers with antimicrobial activity could help to eliminate residual microorganism that have survived after endodontic treatment. The present study aimed to compare the antimicrobial activity of the endodontic sealers Acroseal, Sealapex and AH Plus in vitro biofilm model. It were prepared 144 bovine dentin specimens, twelve blocks for each cement in each experimental time that remained in plates containing culture medium inoculated with E. faecalis (ATCC 51299) for biofilm formation. After 14 days, the samples were transferred to another plate with test sealers and were kept at 37oC and 5% CO2 for 2, 7 and 14 days. Specimens without sealers were used as a control for each period. After each experimental, the samples were agitated in sonicator. The suspensions were agitated in vortex and serially diluted in saline and triple plaqued in m-Enterococcus agar. Colony forming unit were counted and the data were statistically analyzed using ANOVA, Shapiro-Wilk and Kruskal-Wallis one-way test (p<0.05) for the antimicrobial potential determination. Results: Sealapex showed significant difference in all experimental times in comparison to all other groups. AH Plus and Acroseal showed antimicrobial activity just at 14th experimental day. Conclusion: Neither of sealers setting tested was able to remove biofilm . The Sealapex showed higher antimicrobial activity in all experimental periods. All sealers examined the antimicrobial effectiveness was higher with over time