Influence of Drying Protocol with Isopropyl Alcohol on the Bond Strength of Resin-based Sealers to the Root Dentin

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• 作者：Klé ; ber Campioni Dias ; MSc^&lowast ; ; Carlos José ; Soares ; PhD^&dagger ; ; Liviu Steier ; Dr med dent^&Dagger ; ; Marco Auré ; lio Versiani ; PhD^&lowast ; ; Fuad Jacob Abi Rached-Jú ; nior ; PhD^§ ; ; Jesus Djalma Pé ; cora ; PhD^&lowast ; ; Yara Terezinha Correa Silva-Sousa ; PhD^§ ; ; Manoel Damiã ; o de Sousa-Neto ; PhD^&lowast ; ; ^{sousanet@forp.usp.br" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Bond strength ; isopropyl alcohol ; push-out test ; resin-based sealer ; root dentin
• 刊名：Journal of Endodontics
• 出版年：2014
• 出版时间：September 2014
• 年：2014
• 卷：40
• 期：9
• 页码：1454-1458
• 全文大小：130 K

文摘

This study compared the bond strength, interfacial ultrastructure, and tag penetration of resin-based sealers applied to smear-free radicular dentin using 70% isopropyl alcohol as the active final rinse.

Methods

Eighty root canals were prepared and assigned to 2 groups (n = 40) according to the drying protocol: paper points or 70% isopropyl alcohol. Then, roots were divided into 4 subgroups (n = 10) with respect to the sealer and obturation material: AH Plus (Dentsply De Trey GmbH, Konstanz, Germany) and gutta-percha (AH/GP), Hybrid Root SEAL (Sun Medical, Tokyo, Japan) and gutta-percha (HR/GP), Epiphany SE (Pentron Clinical Technologies, Wallingford, CT) and gutta-percha (EP/GP), and Epiphany SE and Resilon (EP/RS). Roots were sectioned, and the push-out test was performed. Failure modes were examined under stereomicroscopy and sealer penetration into the dentinal tubules under scanning electron microscopy. Data were statistically analyzed by 2-way analysis of variance post hoc Tukey tests with a significant level of 5%.

Results

Overall, canals dried with isopropyl alcohol showed significantly higher bond strength values (2.11 ± 1.74 MPa) than with paper points (1.81 ± 1.73 MPa) (P < .05). The HR/GP group showed lower bond strength than the AH/GP group (P < .05) but higher than the EP/GP and EP/RS groups (P < .05). The most frequent type of failure was cohesive in the AH/GP and HR/GP groups and adhesive in the EP/GP and EP/RS groups. Scanning electron microscopic evaluation revealed better adaptation of the adhesive interface in the AH/GP and HR/GP groups in comparison with the EP/GP and EP/RS groups.

Conclusions

A final rinse with EDTA and 70% isopropyl alcohol improved the bond strength and penetration of the sealers into dentinal tubules of the root.