Propriedade antibacteriana e citotoxicidade de cimentos reparadores biocerâmicos.
Propriedade antibacteriana e citotoxicidade de cimentos reparadores biocerâmicos.
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DOI: https://doi.org/10.22533/at.ed.0172421052
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Palavras-chave: Biocompatibilidade, Citotoxicidade, Endodontia
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Keywords: Biocompatibility, cytotoxicity, Endodontics
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Abstract: The mineral trioxide aggregate Flow was developed to improve physical properties. The objective of this study was to evaluate cytotoxicity and antimicrobial activity of MTA Flow in comparison to MTA Angelus and ProRoot MTA. For microbiological analysis, five plates containing BHI agar received 0.1 mL of the bacterial suspension (1.5 x 108 CFU mL-1) spread on their surface. Subsequently, 4 wells were created at equidistant points, one for each material and a positive control with 2% chlorhexidine. All plates were incubated at 37oC for 48 h under aerobic conditions. The results were evaluated according to inhibition zones around the wells. All assays were performed in triplicate and results recorded according to the average diameter of the zone of inhibition. For cytotoxicity, undifferentiated pulp cells (OD-21) were cultured and evaluated using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) assay, exposed to dilution of serial extracts in 6, 24, 48h. Cytotoxicity was analyzed by two-way ANOVA and Bonferroni correction. In the microbiological analysis there was no statistical difference (P>.05) between the cements and the positive control. In cytotoxicity, cellular exposure to all cement extracts (undiluted and 1⁄2) increased cellular metabolism in the 6h period (P<.05) and significantly decreased in 24h and 48h when compared to the Control group (P<.05 ). Comparison between cement extracts at the same dilution showed that, regardless of the dilution (undiluted, 1⁄2 and 1⁄4), the MTA Flow extract promoted an increase in cellular metabolism compared to the MTA Angelus and ProRoot MTA extracts (P <.05). The ProRoot MTA 1⁄2 dilution stimulated cell growth when compared to the MTA Angelus 1⁄2 dilution at 6h (P<.05). The results demonstrate that the bioceramic repair cements tested showed antimicrobial activity against E.faecalis in planktonic state and cellular biocompatibility, confirming their clinical application in endodontics.
- Carlos Roberto Emerenciano Bueno
- Leopoldo Cosme-Silva
- Ana Cláudia Rodrigues da Silva
- Índia Olinta de Azevedo Queiroz
- Rogério de Castilho Jacinto
- Sandra Helena Penha de Oliveira
- Eloi Dezan Junior