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VOLUME 17 , ISSUE 1 ( January, 2016 ) > List of Articles

RESEARCH ARTICLE

Effect of Endodontic Retreatment on Push-out Bond Strength and Quality of Fiber Postbonding Interface of Resin Cements

Sérgio Luiz Pinheiro, Carlos Eduardo da Silveira Bueno, Rina Andréa Pelegrine, Luís Alexandre Maffei Sartini Paulillo, Augusto Shoji Kato, Carlos Eduardo Fontana, Alexandre Sigrist De Martin

Citation Information : Pinheiro SL, da Silveira Bueno CE, Pelegrine RA, Paulillo LA, Kato AS, Fontana CE, Martin AS. Effect of Endodontic Retreatment on Push-out Bond Strength and Quality of Fiber Postbonding Interface of Resin Cements. J Contemp Dent Pract 2016; 17 (1):42-48.

DOI: 10.5005/jp-journals-10024-1801

Published Online: 01-01-2016

Copyright Statement:  Copyright © 2016; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

The aim of this study is to evaluate the impact of endodontic retreatment on push-out bond strength and dentin interface of two resin cements used for fiber postcementation during endodontic retreatment.

Materials and methods

The root canals of 40 extracted human canines were prepared, obturated and divided into four groups (n = 10). Gutta-percha was partially removed and fiber posts were immediately cemented in groups 1 and 2 using Panavia F with ED Primer and RelyX™ U200, respectively. In groups 3 and 4, the root canal access was sealed with temporary restorative cement, specimens were stored for 30 days, endodontically retreated, and fiber posts were cemented using the resin cements applied to groups 1 and 2, respectively. Push-out tests and scanning electron microscopy analyses of different areas were performed. Data from push-out bond strengths were analyzed by one-way analysis of variance and Tukey's tests.

Results

Higher bond strength values were detected in the apical third for group 1 than group 3 (p < 0.05). No differences were observed in other comparisons between the same third of different groups (p > 0.05). Comparisons between different thirds in the same group revealed a higher bond strength in the apical third for group 1. Scanning electron microscopy showed formation of hybrid layer and extensive resin tags in group 1. No hybrid layer was observed in groups 2 and 4.

Conclusion

Endodontic retreatment had adverse effects on the push-out bond strength and dentinal interface of Panavia F with ED Primer when used for fiber postcementation specifically in the apical third, but not on RelyX™ U200.

Clinical significance

A significant interaction was detected between endodontic retreatment and resin cement, which indicated that endodontic retreatment might adversely affect the push-out bond strength and dentinal interface of Panavia F with ED Primer when used for fiber postcementation specifically in the apical third.

How to cite this article

Pelegrine RA, Paulillo LAMS, Kato AS, Fontana CE, Pinheiro SL, De Martin AS, da Silveira Bueno CE. Effect of Endodontic Retreatment on Push-out Bond Strength and Quality of Fiber Postbonding Interface of Resin Cements. J Contemp Dent Pract 2016;17(1):42-48.


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