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VOLUME 16 , ISSUE 12 ( December, 2015 ) > List of Articles


Effect of Carbamide Peroxide on the Push-out Bond Strength of Different Composition Glass-Ionomer Cement to Root Canal Dentin when used as Cervical Barrier

Mateus Rodrigues Tonetto, Milton Carlos Kuga, Matheus Coelho Bandeca, Weber Adad Ricci, José Cláudio Martins Segalla, Suellen Nogueira Linares Lima, Ana Carolina Venção, Miriam Graziele Magro, Aimeé Maria Guiotti, Keren Crisitina Fagundes Jordão-Basso

Citation Information : Tonetto MR, Kuga MC, Bandeca MC, Ricci WA, Segalla JC, Lima SN, Venção AC, Magro MG, Guiotti AM, Jordão-Basso KC. Effect of Carbamide Peroxide on the Push-out Bond Strength of Different Composition Glass-Ionomer Cement to Root Canal Dentin when used as Cervical Barrier. J Contemp Dent Pract 2015; 16 (12):944-949.

DOI: 10.5005/jp-journals-10024-1786

Published Online: 01-05-2016

Copyright Statement:  Copyright © 2015; The Author(s).



To evaluate the effect of 37% carbamide peroxide on the bond strength of conventional or resin-modified glass-ionomer cements when used as a cervical barrier in endodonticallytreated teeth.

Materials and methods

After root canal instrumentation and obturation, 40 specimens of the cement-enamel junction were obtained after transversal root canal sectioning from human extracted canines. The root canal specimens were standardized and filled with the following materials (n = 10, each group): G1: zinc phosphate (control), G2: Ketac glass-ionomer, G3: vitrebond glass-ionomer or G4: GC GL glass-ionomer. After 24 hours, the specimens were subjected to an application of 37% carbamide peroxide for 21 days, changed each 7 days and stored in an artificial pulp chamber. The specimens were then submitted to push-out bond strength testing with an electromechanical test machine (EMIC) and the failure mode in each specimen was analyzed with confocal microscopy (LEXT).


G3 and G4 showed higher bond strengths values than the other groups (p < 0.05), and were similar to each other (p > 0.05). G1 showed the lowest bond strength value (p < 0.05).


Glass-ionomer cements showed higher bond strength values than the zinc phosphate cement, and resinmodified glass-ionomer cements presented the highest push-out values to root canal dentin (GC, GL and Vitrebond).

Clinical significance

Glass ionomer cements are recommended to use as cervical barrier materials before the internal dental bleaching, but its efficiency is questionable.

How to cite this article

Lima SNL, Venção AC, Kuga MC, Magro MG, Guiotti AM, Segalla JCM, Jordão-Basso KCF, Ricci WA, Tonetto MR, Bandéca MC. Effect of Carbamide Peroxide on the Push-out Bond Strength of Different Composition Glass-Ionomer Cement to Root Canal Dentin when used as Cervical Barrier. J Contemp Dent Pract 2015;16(12):944-949.

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