Does sodium thiosulphate avoid the formation of the brown-coloured precipitate as an intermediate irrigant between NaOCl and chlorhexidine?

Autor: Alberto APL; Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil., Oliveira DDS; Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil., Oliveira HE; Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil., Maciel ACC; Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil., Belladonna FG; Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil., Silva EJNLD; Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.
Jazyk: angličtina
Zdroj: Australian endodontic journal : the journal of the Australian Society of Endodontology Inc [Aust Endod J] 2022 Apr; Vol. 48 (1), pp. 72-76. Date of Electronic Publication: 2021 Sep 08.
DOI: 10.1111/aej.12562
Abstrakt: This study evaluated the efficacy of sodium thiosulphate (ST) as an intermediate irrigant between sodium hypochlorite (NaOCl) and chlorhexidine (CHX) to avoid the formation of the brown-coloured precipitate. The in vitro experiment used microtubes to test the mixture of 2.5% NaOCl, 2% CHX and 5% ST solutions, varying their order and time of addition. In the ex vivo experiment, 10 bovine teeth were divided into two groups according to the intermediate irrigant used: distilled water (control) and 5% ST (experimental). Colour change occurred in all microtubes after interaction between solutions. While the precipitate was not observed in the experimental group, it was seen in all specimens of the control group. The 5% ST was able to prevent the formation of the brown-coloured precipitate in the ex vivo experiment, whereas it only prevented its in vitro formation when the waiting time for adding CHX was 10, 15 and 20 min.
(© 2021 Australian Society of Endodontology Inc.)
Databáze: MEDLINE
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