Effect of NaClO Treatment on Bonding to Root Canal Dentin Using a New Evaluation Method.

Ishizuka, Tomoyasu; Kataoka, Hirokatsu; Yoshioka, Takatomo; Suda, Hiroshi; Iwasaki, Naohiko; Takahashi, Hidekazu; Nishimura, Fumio

doi:10.4012/dmj.20.24

Cited by 49 publications

(46 citation statements)

References 8 publications

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“…On the other hand, less-than-ideal resin-dentin adhesion may occur under clinical situations, which may favor the removal of resin-based root canal filling materials. There are several causes that impair resin-dentin adhesion in the root canal system, such as ineffective EDTA conditioning in the deeper part of the canal wall 20) , the use of sodium hypochlorite that may adversely affect bond strength 21,22) , and the presence of uninstrumented areas 23) that may be unfavorable to adhesion. These could explain, at least in part, why it has been reported that Epiphany/Resilon showed lower adhesive strength to dentin 24,25) and was easier to remove compared with gutta-percha and a conventional epoxy resin sealer (AH Plus) [14][15][16] .…”

Section: Discussionmentioning

confidence: 99%

Removal of Resin-based Root Canal Filling Materials with K3 Rotary Instruments: Relative Efficacy for Different Combinations of Filling Materials

Iizuka¹,

Takenaka²,

Shigetani³

et al. 2008

Dent. Mater. J.

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Removal of resin-based root canal filling materials may cause serious problems during root canal retreatment. This study compared the working time and amount of canal enlargement when different resin-based root canal filling materials were removed with K3 rotary instruments with or without heat-softening using System B. Root canal sealer/filling point combinations tested were Epiphany/Resilon, SuperBond/Resilon, SuperBond/gutta-percha, and Canals N/gutta-percha. The materials were filled into simulated curved resin canals and removed with K3 instruments in a standardized crown-down procedure. In terms of working time, Epiphany/Resilon required a significantly longer working time than the others. However, heat application with System B significantly reduced the working time for the removal of Epiphany/Resilon. In terms of canal enlargement, there were no significant differences among the tested groups as determined with digital morphometry. It was thus concluded that Epiphany removal with K3 rotary instruments might result in extended working time, but which could be reduced with heat-softening using System B.

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Section: Discussionmentioning

confidence: 99%

Removal of Resin-based Root Canal Filling Materials with K3 Rotary Instruments: Relative Efficacy for Different Combinations of Filling Materials

Iizuka¹,

Takenaka²,

Shigetani³

et al. 2008

Dent. Mater. J.

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“…To date, there have been many reports on the effects of NaClO application after acid-etching on bond strength to dentin [19][20][21][22][23][24][25][26][27] . On one hand, Prati et al 19) and Saboia et al 20) reported that NaClO treatment removed the unprotected collagen layer after acid-etching and increased the dentin bond strength of some adhesive systems.…”

Section: Discussionmentioning

confidence: 99%

Dentin bond strength of a new adhesive system containing calcium phosphate experimentally developed for direct pulp capping

et al. 2009

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The purpose of this study was to evaluate the microtensile bond strength (µTBS) to human dentin of an experimental bonding agent containing calcium phosphates experimentally developed for direct pulp capping. Different concentrations of four types of calcium phosphates were added to an experimental bonding monomer, and six experimental bonding agents were thus prepared. Clearfil SE Bond/Bond was used as the control. Flat dentin surfaces of human molars were assigned to the experimental adhesive systems and the control. After Clearfil SE Bond/Primer was applied to the dentin surface, each experimental bonding agent was applied and photopolymerized, and then a resin composite paste was placed and photopolymerized. The specimens were subjected to µTBS testing. Results revealed that there were no significant differences among the µTBS values of the experimental bonding agents and the control. In other words, the calcium phosphate-containing experimental adhesives did not adversely affect the µTBS to dentin.

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“…The efficiency of adhesive systems is directly related to the dentin quality and collagen integrity. The fact that NaOCl is an efficient organic solvent that causes dissolution of dentin collagen fibrils [12,16] might explain its negative influence on the bond strength of the self-adhesive resin cement shown in this study, since collagen plays an important role in the formation of the hybrid layer.…”

Section: Discussionmentioning

confidence: 98%

The effect of endodontic chemicals on the retention of fiber posts luted using a self-adhesive cement

et al. 2014

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The aim of this study was to assess the effect of endodontic chemical substances on the retention of fiber posts luted using a self-adhesive cement. Single-canal human roots of 75 teeth were divided into 5 groups (n = 15). Root canals were instrumented with one of the following substances: 0.9% NaCl (control); 5.25% sodium hypochlorite; 5.25% Sodium hypochlorite + 17% EDTA; 2% chlorhexidine gel; 2% chlorhexidine gel + 17% EDTA. After chemo-mechanical preparation, fiber post cementation was performed with self-adhesive resin cement (RelyX Unicem, 3 M/ESPE). One-way ANOVA was performed followed by a multiple comparison Tukey post hoc test (α = 5%). The use of 2% chlorhexidine gel resulted bond strength statistically similar to the control group (p = 0.418), which was higher than the other groups. A final irrigation with 17% EDTA significantly reduced bond strength (p < 0.001). The use of 5.25% sodium hypochlorite negatively affected the bond strength, either with or without a final irrigation with 17% EDTA (p < 0.001). Our results suggest that 2% chlorhexidine gel used during endodontic chemo-mechanical preparation, without a final irrigation with 17% EDTA, promotes a more favorable condition to the retention of fiber posts luted using a self-adhesive cement than 5.25% sodium hypochlorite.

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Effect of NaClO Treatment on Bonding to Root Canal Dentin Using a New Evaluation Method.

Cited by 49 publications

References 8 publications

Removal of Resin-based Root Canal Filling Materials with K3 Rotary Instruments: Relative Efficacy for Different Combinations of Filling Materials

Removal of Resin-based Root Canal Filling Materials with K3 Rotary Instruments: Relative Efficacy for Different Combinations of Filling Materials

Dentin bond strength of a new adhesive system containing calcium phosphate experimentally developed for direct pulp capping

The effect of endodontic chemicals on the retention of fiber posts luted using a self-adhesive cement

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