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The Effect of Viscosity and Application Mode of Phosphoric Acid on Bond Strength of GlassFiber Post

BACKGROUND: When a phosphoric acid is used, before applying an adhesive system, it is known that obtaining an effective adhesion to the root canal walls is a challenge. The aim of the present study was to evaluate the influence of phosphoric acid viscosity and application mode on the push-out bond s...

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Autores principales: Costa Scholz, Maria Fernanda, Aboud Matos de Almeida, Rossana, Scholz, Nelson, Gomes, Giovana M, Masson-P, María José, Loguercio, Alessandro D, Reis, Alessandra, Bandéca, Matheus C
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Dove 2020
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7049749/
https://www.ncbi.nlm.nih.gov/pubmed/32161504
http://dx.doi.org/10.2147/CCIDE.S230134
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author Costa Scholz, Maria Fernanda
Aboud Matos de Almeida, Rossana
Scholz, Nelson
Gomes, Giovana M
Masson-P, María José
Loguercio, Alessandro D
Reis, Alessandra
Bandéca, Matheus C
author_facet Costa Scholz, Maria Fernanda
Aboud Matos de Almeida, Rossana
Scholz, Nelson
Gomes, Giovana M
Masson-P, María José
Loguercio, Alessandro D
Reis, Alessandra
Bandéca, Matheus C
author_sort Costa Scholz, Maria Fernanda
collection PubMed
description BACKGROUND: When a phosphoric acid is used, before applying an adhesive system, it is known that obtaining an effective adhesion to the root canal walls is a challenge. The aim of the present study was to evaluate the influence of phosphoric acid viscosity and application mode on the push-out bond strength (BS) values of fiberglass post to root dentin. The conditioning pattern on the root dentin was also evaluated. MATERIALS AND METHODS: The roots of 44 endodontically treated premolars were divided into 4 groups, of eleven teeth each, according to the combination of the main factors: phosphoric acid viscosity (liquid or gel) and application mode (passive or sonic). After application of the two-step etch-and-rinse adhesive system, the fiberglass posts were cemented with a dual-cure resin-cement. Roots were sectioned transversely into six 1-mm slices for push-out BS test at 0.5 mm/min. Some roots of each group were selected for evaluation of the conditioning pattern by scanning electron microscopy. BS results (three-way ANOVA and Tukey’s test) and the conditioning pattern (Kruskal–Wallis test and Mann–Whitney test) were statistically evaluated (α= 0.05). RESULTS: The highest BS value was observed with a liquid phosphoric acid under sonic application mode (p < 0.05), being all other groups similar to one another (p < 0.05). Also, the highest BS value was observed in the cervical third, followed by the medium and the apical thirds (p < 0.05). The sonic application produced better smear layer removal and opening of dentinal tubules for both viscosities (p = 0.015). CONCLUSION: A better bonding of fiberglass posts to root canals can be achieved when the post spaces are conditioned with a liquid phosphoric acid under sonic application.
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spelling pubmed-70497492020-03-11 The Effect of Viscosity and Application Mode of Phosphoric Acid on Bond Strength of GlassFiber Post Costa Scholz, Maria Fernanda Aboud Matos de Almeida, Rossana Scholz, Nelson Gomes, Giovana M Masson-P, María José Loguercio, Alessandro D Reis, Alessandra Bandéca, Matheus C Clin Cosmet Investig Dent Original Research BACKGROUND: When a phosphoric acid is used, before applying an adhesive system, it is known that obtaining an effective adhesion to the root canal walls is a challenge. The aim of the present study was to evaluate the influence of phosphoric acid viscosity and application mode on the push-out bond strength (BS) values of fiberglass post to root dentin. The conditioning pattern on the root dentin was also evaluated. MATERIALS AND METHODS: The roots of 44 endodontically treated premolars were divided into 4 groups, of eleven teeth each, according to the combination of the main factors: phosphoric acid viscosity (liquid or gel) and application mode (passive or sonic). After application of the two-step etch-and-rinse adhesive system, the fiberglass posts were cemented with a dual-cure resin-cement. Roots were sectioned transversely into six 1-mm slices for push-out BS test at 0.5 mm/min. Some roots of each group were selected for evaluation of the conditioning pattern by scanning electron microscopy. BS results (three-way ANOVA and Tukey’s test) and the conditioning pattern (Kruskal–Wallis test and Mann–Whitney test) were statistically evaluated (α= 0.05). RESULTS: The highest BS value was observed with a liquid phosphoric acid under sonic application mode (p < 0.05), being all other groups similar to one another (p < 0.05). Also, the highest BS value was observed in the cervical third, followed by the medium and the apical thirds (p < 0.05). The sonic application produced better smear layer removal and opening of dentinal tubules for both viscosities (p = 0.015). CONCLUSION: A better bonding of fiberglass posts to root canals can be achieved when the post spaces are conditioned with a liquid phosphoric acid under sonic application. Dove 2020-02-26 /pmc/articles/PMC7049749/ /pubmed/32161504 http://dx.doi.org/10.2147/CCIDE.S230134 Text en © 2020 Costa Scholz et al. http://creativecommons.org/licenses/by-nc/3.0/ This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License (http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms (https://www.dovepress.com/terms.php).
spellingShingle Original Research
Costa Scholz, Maria Fernanda
Aboud Matos de Almeida, Rossana
Scholz, Nelson
Gomes, Giovana M
Masson-P, María José
Loguercio, Alessandro D
Reis, Alessandra
Bandéca, Matheus C
The Effect of Viscosity and Application Mode of Phosphoric Acid on Bond Strength of GlassFiber Post
title The Effect of Viscosity and Application Mode of Phosphoric Acid on Bond Strength of GlassFiber Post
title_full The Effect of Viscosity and Application Mode of Phosphoric Acid on Bond Strength of GlassFiber Post
title_fullStr The Effect of Viscosity and Application Mode of Phosphoric Acid on Bond Strength of GlassFiber Post
title_full_unstemmed The Effect of Viscosity and Application Mode of Phosphoric Acid on Bond Strength of GlassFiber Post
title_short The Effect of Viscosity and Application Mode of Phosphoric Acid on Bond Strength of GlassFiber Post
title_sort effect of viscosity and application mode of phosphoric acid on bond strength of glassfiber post
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7049749/
https://www.ncbi.nlm.nih.gov/pubmed/32161504
http://dx.doi.org/10.2147/CCIDE.S230134
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