Adhesion performance of a universal adhesive in the root canal: Effect of etch-and-rinse vs. self-etch mode.

Fereshteh Shafiei,Zahra Jowkar,Pourya Mohammadparast,Yogendra Kumar Mishra

doi:10.1371/journal.pone.0195367

Fereshteh Shafiei, Zahra Jowkar + Show 2 more

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https://doi.org/10.1371/journal.pone.0195367

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Journal: PloS one	Publication Date: Apr 9, 2018
Citations: 16	License type: CC BY 4.0

Affiliation: Shiraz University of Medical Sciences

Abstract

PurposeUniversal adhesives are new systems that can be used in etch-and-rinse (ER) and self-etch (SE) modes. This in vitro study evaluated the bonding performance of a universal adhesive in ER mode and SE mode with two irrigants for luting fiber posts in the root canal.Materials and methodsAfter separation of the roots from the crowns of 56 maxillary central incisors and endodontic treatment, 10-mm post space was prepared. The roots were divided into seven groups according to irrigant/adhesive protocol used for cementation of posts: 1) sodium hypochlorite (NaOCl) irrigant + acid etching + One-Step Plus, 2) NaOCl + Clearfil SE Bond (CSE) and 3) EDTA + CSE as controls; 4) NaOCl + All-Bond Universal (AB) in ER mode, 5) NaOCl + AB in SE mode, 6) EDTA + AB in SE mode, 7) distilled water + AB in SE mode. Posts were luted using Duo-link. The bonded roots were sectioned into microslices. After push-out bond strength (PBS) testing, data in MPa were analyzed with two-way ANOVA and Tukey test (α = 0.05).ResultsPBS was significantly affected by irrigation/adhesive protocol and root region (P<0.05), with no significant interaction of these factors. PBS of ABU in ER mode with NaOCl and in SE mode with NaOCl or EDTA was comparable to that in the respective controls. The highest and lowest PBSs were recorded for ABU in the SE mode with EDTA (15.38 ± 4) and NaOCl (10.17 ± 3.5), respectively. PBS of AB in ER and SE modes was similar when distilled water was used in the SE mode.ConclusionAdhesive performance of AB in the ER mode was comparable to or different from the SE mode, depending on the irrigant used to prepare post space in SE approach. AB could behave as a reliable bonding for post cementation.

Highlights

Use of fiber-reinforced composite posts (FRC) has increased in recent years because they provide esthetic and support for the restoration of endodontically treated teeth [1]
The roots were divided into seven groups according to irrigant/adhesive protocol used for cementation of posts: 1) sodium hypochlorite (NaOCl) irrigant + acid etching + One-Step Plus, 2) NaOCl + Clearfil SE Bond (CSE) and 3) ethylene diamine tetra acetic acid (EDTA) + CSE as controls; 4) NaOCl + All-Bond Universal (AB) in ER mode, 5) NaOCl + AB in SE mode, 6) EDTA + AB in SE mode, 7) distilled water + AB in SE mode
The highest and lowest push-out bond strengths (PBS) were recorded for ABU in the SE mode with EDTA (15.38 ± 4) and NaOCl (10.17 ± 3.5), respectively

Summary

Introduction

Use of fiber-reinforced composite posts (FRC) has increased in recent years because they provide esthetic and support for the restoration of endodontically treated teeth [1]. The establishment of effective bonding within the root canal is still a challenge; debonding of the post and the endodontic lesion has been described as the predominant failure mode of the restoration [5] This failure is attributed to intrinsic difficulties in relation to correct handling of adhesive systems in narrow and deep root canal space with limited access and visibility [6] and high configuration factor (C-factor) within the confined space of root canal [7] that can even exceed 200. A thick and heavy secondary smear layer is formed during post space preparation [8, 9] This could jeopardize prognosis of root canal therapy and interfere with bonding efficacy of adhesive systems to root dentin. The bonding ability is affected by different adhesive approaches and irrigants used for removal of the smear layer [10]

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Conclusion