Effect of the application of different concentrations of EDTA on the adhesion of fiber posts using self-adhesive cements.

Yançanã Luizy Gruber,Giovana Mongruel Gomes,Renata Terumi Jitumori,João Carlos Gomes,Alessandra Reis,Thaís Emanuelle Bakaus

doi:10.1590/1807-3107bor-2021.vol35.0012

Yançanã Luizy Gruber, Giovana Mongruel Gomes + Show 4 more

Open Access

https://doi.org/10.1590/1807-3107bor-2021.vol35.0012

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Abstract

The purpose of this study was to analyze the effect of the application of different concentrations of EDTA on the adhesion of fiber posts to root dentin using self-adhesive resin cements. After endodontic treatment, 78 single roots were randomly divided into six groups (n = 13) according to the combination of the following factors: surface dentin treatment - control (distilled water), 17% EDTA and 24% EDTA; and self-adhesive resin cement - RelyX U200 (RX); and Multilink Speed (ML). After fiber post cementation, six slices were obtained for each root. Ten roots of each group were used for bond strength (BS) and three for microhardness (MH) evaluations. Data obtained from BS and MH tests for each resin cement were subjected to two-way ANOVA (surface treatment vs. root region) and to a post-hoc Tukey's test (α = 0.05). The lowest BS value was observed in the 24% EDTA group for RX cement, whereas the highest values for ML cement were observed for the control group in the middle and apical regions. In the MH test, the lowest value for RX was observed for 24% EDTA in the cervical region, whereas and the highest value for the ML cement was observed in the control group. Regarding both self-adhesive resin cements tested, the application of 24% EDTA was not able to improve the adhesion of fiber posts to root canal.

Highlights

Fiber posts are commonly used in the reconstruction of teeth with extensive coronal destruction, since endodontically-treated teeth are more prone to fractures than are vital teeth.[1]
Push-out bond strength For RelyX U200, the two-way ANOVA demonstrated that the cross-product interaction was not significant (p = 0.702), and neither was root region (p = 0.473)
The lowest bond strength value was observed in the 24% ethylenediaminetetraacetic acid (EDTA) group, whereas the control and 17% EDTA groups were similar to one another

Summary

Introduction

Fiber posts are commonly used in the reconstruction of teeth with extensive coronal destruction, since endodontically-treated teeth are more prone to fractures than are vital teeth.[1].

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