Ionic concentration in periradicular medium after dissolution of endodontic file fragments: an in vitro study

The aim of this study was to obtain ionic quantification in periradicular medium after diffusion tests of the solution used inside root canals during the electrochemical dissolution of endodontic file fragments and the NiTi-containing dissolution product via an apical foramen. Thirty single-rooted e...

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Bibliographic Details
Published in:	Brazilian oral research Vol. 36; p. e015
Main Authors:	Ormiga, Fabiola, Amaral, Caroline Chavadian Fonseca, Vieira, Felipe Martins, Risso, Patricia de Andrade, Silva, Adriana Barbosa da, Almeida, Marcelo, Sena, Rodrigo, Feres-Filho, Eduardo Jorge, Granjeiro, Jose Mauro, Gomes, José Antonio da Cunha Ponciano
Format:	Journal Article
Language:	English
Published:	Brazil Sociedade Brasileira de Pesquisa Odontológica - SBPqO 2022 Sociedade Brasileira de Pesquisa Odontológica
Subjects:	Dental Instruments Dental Pulp Cavity DENTISTRY, ORAL SURGERY & MEDICINE Diffusion Electrochemical Techniques Endodontics Humans Nickel Root Canal Preparation Solubility Titanium Tooth Apex Titanium Endodontics Nickel Electrochemical Techniques Diffusion
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Summary:	The aim of this study was to obtain ionic quantification in periradicular medium after diffusion tests of the solution used inside root canals during the electrochemical dissolution of endodontic file fragments and the NiTi-containing dissolution product via an apical foramen. Thirty single-rooted extracted human teeth had root canals prepared and were attached to Eppendorf tubes filled with sterile saline. The samples were divided into 3 groups (n = 10) according to the solution used inside the root canal during the diffusion tests: Group 1: [NaF 12 g/L + NaCl 1 g/L]; Group 2: [NaF 12 g/L + NaCl 1 g/L + NiTi 0.50 g/L]; Group 3: [NaF 6 g/L + NaCl 0.5 g/L + NiTi 0.25 g/L]. The sample in each Eppendorf tube was then analyzed to assay the ionic quantification in periradicular medium. The groups were compared in relation to ionic quantifications (Kruskal-Wallis and Dunn's tests, p ≤ 0.05). Group 2 showed significantly higher F-, Ni and Ti quantities than groups 1 and 3 (p < 0.05). Group 3 showed significantly higher Ti and Ni quantities than group 1, where no measurable quantities of Ti and Ni were observed (p < 0.05). The conclusions were that a 50% dilution of the NiTi-containing dissolution product resulted in significantly lower F-, Ni and Ti quantities compared to the undiluted product. The quantifications observed here suggest that irrigation is recommendable during the electrochemical dissolution process to reduce the resultant ion concentrations in both the root canal and the periradicular medium.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1806-8324 1807-3107 1807-3107
DOI:	10.1590/1807-3107bor-2022.vol36.0015