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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Penetration of sodium hypochlorite into root canal dentine: effect of surfactants, gel form and passive ultrasonic irrigation

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Author(s):
Faria, G. [1] ; Viola, K. S. [1] ; Coaguila-Llerena, H. [1] ; Oliveira, L. R. A. [1] ; Leonardo, R. T. [1] ; Aranda-Garcia, A. J. [2] ; Guerreiro-Tanomaru, J. M. [1]
Total Authors: 7
Affiliation:
[1] UNESP Sao Paulo State Univ, Araraquara Sch Dent, Dept Restorat Dent, Sao Paulo - Brazil
[2] Secretariat Mexican Navy, Mexico City, DF - Mexico
Total Affiliations: 2
Document type: Journal article
Source: International Endodontic Journal; v. 52, n. 3, p. 385-392, MAR 2019.
Web of Science Citations: 2
Abstract

Aim To assess the penetration of sodium hypochlorite (NaOCl) gel or NaOCl solutions with surfactants, and the effect of passive ultrasonic irrigation (PUI) on penetration into dentinal tubules. Methodology Bovine incisor root canals were instrumented, the roots sectioned and the dentine blocks obtained were stained with crystal violet. Dentine blocks (n = 10 per group) were exposed to 3% NaOCl gel or 3% NaOCl solution for 10 and 20 min. Other dentine blocks (n = 10 per group) were exposed to Chlor-Extra (6% NaOCl + surfactant), 6% NaOCl, 2.5% NaOCl with 0.2% cetrimide and 2.5% NaOCl for 10 and 20 min. The penetration depth of irrigants into dentinal tubules was measured in micrometres by viewing the bleached crystal violet under a stereomicroscope. Additionally, bovine incisor root canals, instrumented and stained with crystal violet, were distributed into two groups (n = 10) and irrigated with 2.5% NaOCl with PUI or conventional syringe irrigation (CSI). The penetration depth of irrigants into dentinal tubules was assessed 3 and 7 mm from the apex. Statistical analysis was performed by ANOVA and Tukey tests (alpha = 0.05). Results There was significantly greater penetration of 3% NaOCl solution into dentinal tubules compared with the gel form (P < 0.05). There was no difference (P > 0.05) between 6% NaOCl and Chlor-Extra, and between 2.5% NaOCl and 2.5% NaOCl + cetrimide. PUI significantly increased the penetration depth of NaOCl into dentinal tubules when compared with CSI (P < 0.05). Conclusions In extracted bovine incisors, NaOCl gel penetrated less into dentinal tubules than NaOCl solution. The addition of surfactants did not increase the penetration depth. The use of PUI significantly increased NaOCl penetration into dentinal tubules. (AU)

FAPESP's process: 13/01436-7 - Penetration of sodium hypochlorite dentin: effect of irrigant composition and irrigation technique
Grantee:Leonardo Romanelli Alves de Oliveira
Support Opportunities: Scholarships in Brazil - Scientific Initiation