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    Influence of surfactants addition on the properties of calcium hypochlorite solutions

    Year: 2019

    Journal: J. Appl. Oral Sci., Volume 27

    Authors: Iglesias, Julia Eick; Pinheiro, Lucas Siqueira; Weibel, Daniel Eduardo; Montagner, Francisco; Grecca, Fabiana Soares

    Organizations: Coordination for the Improvment of Higher Edication Personel - CAPES

    Keywords: Calcium hypochlorite; Endodontics; Root canal irrigants; Sodium hypochlorite; Surface tension

    Objectives: The aim of this study was to evaluate the influence of surfactants 0.2% or 0.1% cetrimide (Cet) or 0.008% benzalkonium chloride (BAK) on 2.5% calcium hypochlorite (Ca(OCl)(2)), and compare to sodium hypochlorite (NaOCl), regarding the properties of pH, free chlorine content, surface tension, contact angle, pulp dissolution and antimicrobial activity. Material and Methods: The pH and free chlorine content were evaluated by digital pHmeter and by titration, respectively. Surface tension was measured by the platinum ring technique with a Du Nouy tensiometer. The solution's contact angle in human dentin surfaces was checked by Drop Shape Analyzer software. Bovine pulps were used for pulp dissolution analysis and the dissolving capacity was expressed by percent weight loss. Antimicrobial activity over Enterococcus faecalis was evaluated by the agar diffusion method. Results: Surfactants addition to Ca(OCl)(2) and NaOCl did not alter the pH, free chlorine content and pulp dissolution properties. Ca(OCl)(2) had the highest surface tension among all tested solutions. When surfactants were added to Ca(OCl)(2) and NaOCl, there was a significant reduction of surface tension and contact angle values. The addition of 0.2% or 0.1% Cet enhanced antimicrobial activity of both Ca(OCl)(2) and NaOCl. Conclusion: Surfactant addition to 2.5% Ca(OCl)(2) has shown acceptable outcomes for pH, free chlorine content, surface tension, contact angle, pulp dissolution and antimicrobial activity. Furthermore, the addition of 0.2% Cet showed better results for all tested properties.
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