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Type: Journal article
Title: Effect of superoxidized water and sodium hypochlorite, associated or not with EDTA, on organic and inorganic components of bovine root dentin
Author: Ghisi, A.
Kopper, P.
Baldasso, F.
Stürmer, C.
Rossi-Fedele, G.
Steier, L.
De Figueiredo, J.
Morgental, R.
Vier-Pelisser, F.
Citation: Journal of Endodontics, 2015; 41(6):925-930
Publisher: Elsevier
Issue Date: 2015
ISSN: 0099-2399
Statement of
Alexandre Corrêa Ghisi, Patrícia Maria Poli Kopper, Flávia E.R. Baldasso, Caroline P. Stürmer, Giampiero Rossi-Fedele, MClinDent, Liviu Steier, José Antonio Poli de Figueiredo, Renata Dornelles Morgental, Fabiana Vieira Vier-Pelisser
Abstract: Introduction: This study aimed to evaluate the effects of Sterilox (Sx), a superoxidized water, 5% and 2% sodium hypochlorite (5NaOCl and 2NaOCl), and 17% EDTA (E) on the organic and inorganic components of bovine dentin. METHODS: Eighty bovine incisors were randomly divided into 8 groups (n = 10): 5NaOCl, 5NaOCl + E, 2NaOCl, 2NaOCl + E, Sx, Sx + E, E alone, and distilled water (H2O). Root canal instrumentation was performed by using the corresponding irrigant. The apical 15 mm was longitudinally sectioned into 2 fragments, one for light microscopy analysis in slides stained with picrosirius red (organic component) and the other for scanning electron microscopy analysis (inorganic component). Scores data obtained in the light microscopy analysis were submitted to the Kruskal-Wallis test, followed by multiple comparisons test (P < .05). Scanning electron microscopy images were analyzed descriptively. RESULTS: The chemical solution 5NaOCl had a greater effect on the organic component of dentin in area and depth than 2NaOCl. The chemical solutions 5NaOCl + E, 5NaOCl and 2NaOCl + E caused the greatest change in the collagenous organic matrix near the root canal lumen. The chemical solution 2NaOCl showed similar behavior to Sx, associated or not with E, promoting more superficial disorganization of collagen in a smaller area. Demineralization was observed in all groups in which E was used. However, areas of erosion and open dentinal tubules were detected only when it was combined with NaOCl. CONCLUSIONS: Five percent NaOCl promoted the most extensive damage to the organic component of dentin, and when associated to EDTA, dentinal erosion could be seen. Considering these specific aspects, 2% NaOCl and Sx had milder effects on bovine root dentin.
Keywords: Collagen matrix; demineralization; dentin; EDTA; SEM; sodium hypochlorite; sterilox; super-oxidized water
Rights: Copyright © 2015 American Association of Endodontists
DOI: 10.1016/j.joen.2015.01.039
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Dentistry publications

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