Add time:09/05/2019         Source:sciencedirect.com

Accurate knowledge of the safety of the combined use of hyper-pure chlorine dioxide (ClO2, Solumium) with different endodontic agents is not known. The objective was to investigate the possible interactions between hyper-pure ClO2 and Chlorhexidine digluconate (cas 18472-51-0) (CHX) as well as hyper-pure ClO2 and ethylenediaminetetraacetic acid (EDTA) in vitro. High-performance liquid chromatography (HPLC) was used to analyse the reaction between ClO2 and CHX for studying the possible increase of para-chloroaniline (PCA). Nuclear magnetic resonance (NMR) method was applied to investigate if the oxidising property of ClO2 inactivates EDTA. CHX itself may contain PCA; however, its amount did not increase after the mixing up with ClO2. While ClO2 did not oxidise PCA, on the other hand, it oxidised EDTA into numerous degradation products, but this reaction was slow. Hyper-pure ClO2 of excellent antimicrobial properties should be considered as a safe alternative endodontic disinfectant agent in combinations or as a final rinse. The lack of chemical interaction between ClO2 and CHX confirms their safe application in combination.

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