Premium
Effect of root canal irrigants on cervical dentine permeability to hydrogen peroxide
Author(s) -
Surapipongpuntr P.,
Duangcharee W.,
Kwangsamai S.,
Ekka A.
Publication year - 2008
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/j.1365-2591.2008.01446.x
Subject(s) - sodium hypochlorite , hydrogen peroxide , root canal , dentistry , smear layer , chemistry , dentinal tubule , nuclear chemistry , molar , saline , penetration (warfare) , cementum , dentin , materials science , medicine , organic chemistry , operations research , engineering , endocrinology
Aim To examine the effects of various root canal irrigants on cervical dentine permeability by monitoring the diffusion of hydrogen peroxide (H 2 O 2 ). Methodology Sixty cervical dentine discs were prepared from human third molar teeth. After removal of enamel and cementum, the outer dentine surface was etched with 17% ethylenediamine tetraacetic acid (EDTA) for 1 min. The dentine discs were randomly assigned to five groups according to the irrigant used: A, saline solution; B, 2.5% sodium hypochlorite solution (NaOCl); C, 5% NaOCl; D, 17% EDTA and 2.5% NaOCl; E, 17% EDTA and 5% NaOCl. After irrigation on the inner dentine surface with the various solutions, the diffusion of 30% H 2 O 2 was evaluated through each disc using a plastic‐split chamber. H 2 O 2 was applied to the inner‐side chamber, while the outer‐side chamber was filled with de‐ionised water. After 30 min of application of H 2 O 2 , the solution in the outer‐side chamber was collected to determine the concentration of H 2 O 2 using a spectrophotometer. Results The penetration of H 2 O 2 through dentine in group E was significantly highest, followed by groups D, C, B and A respectively (one‐way anova , P < 0.05). Conclusions Among the irrigants used, 17% EDTA and 5% NaOCl had the greatest effect in increasing dentinal permeability to H 2 O 2 .