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Biocorrosive behavior of sulphate-reducing bacteria in kerr endodontic files: Determination of the corrosion

AIMS: This study determined the corrosion rate by mass loss caused by oral strains of sulphate-reducing bacteria (SRB) in Kerr endodontic files (KF), aiming the development of a biopharmaceutical that facilitates the removal of endodontic limb fragments from root canals. MATERIALS AND METHODS: Nine...

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Detalles Bibliográficos
Autores principales: Heggendorn, Fabiano Luiz, Teixeira Pinto, Luiz André Lucas, Gonçalves, Lucio Souza, Lione, Viviane de Oliveira Freitas, Cravo Junior, Walter Barreiro, Soares Lutterbach, Marcia Teresa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7720761/
https://www.ncbi.nlm.nih.gov/pubmed/33384495
http://dx.doi.org/10.4103/JCD.JCD_64_19
Descripción
Sumario:AIMS: This study determined the corrosion rate by mass loss caused by oral strains of sulphate-reducing bacteria (SRB) in Kerr endodontic files (KF), aiming the development of a biopharmaceutical that facilitates the removal of endodontic limb fragments from root canals. MATERIALS AND METHODS: Nine new KF were analyzed after immersion in the modified Postgate E culture medium inoculated with Desulfovibrio desulfuricans oral (84 days), Desulfovibrio fairfieldensis in the consortium (84 days) and environmental D. desulfuricans (119 days). RESULTS: Optical microscopy revealed corrosion suggestive areas in all files submitted to immersion in SRB cultures, presenting a statistical difference (P < 0.05) between the samples environmental D. desulfuricans and KF control and between oral D. desulfuricans and KF control. Epifluorescence microscopy revealed an active SRB biofilm over the entire metal surface of the KF, as evidenced by the SYTO(®) 9 fluorophore. CONCLUSION: SRB were capable of promoting biocorrosion in Kerr type endodontic files, but with low rate.