Microleakage in class II restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles

Abstract Background The contraction presented by resin composites causes an increase in stress at the tooth-resin interface, causing micro-gaps that allow microleakage. This study aims to evaluate the degree of in vitro marginal microleakage in class II restorations with two bulk fill resin composit...

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Autores principales:	César F. Cayo-Rojas, Karen K. Hernández-Caba, Ana S. Aliaga-Mariñas, Marysela I. Ladera-Castañeda, Luis A. Cervantes-Ganoza
Formato:	article
Lenguaje:	EN
Publicado:	BMC 2021
Materias:	Monoblock resin Composite resin Marginal adaptation Microleakage Molar Mono incremental resin Dentistry RK1-715
Acceso en línea:	https://doaj.org/article/266abf1ac64840e68eed1b7374b996dc
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spelling	oai:doaj.org-article:266abf1ac64840e68eed1b7374b996dc2021-12-05T12:20:32ZMicroleakage in class II restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles10.1186/s12903-021-01942-01472-6831https://doaj.org/article/266abf1ac64840e68eed1b7374b996dc2021-12-01T00:00:00Zhttps://doi.org/10.1186/s12903-021-01942-0https://doaj.org/toc/1472-6831Abstract Background The contraction presented by resin composites causes an increase in stress at the tooth-resin interface, causing micro-gaps that allow microleakage. This study aims to evaluate the degree of in vitro marginal microleakage in class II restorations with two bulk fill resin composites compared to a conventional nanohybrid resin composite. Methods The present study was an in vitro experimental design. A total of 30 standardized class II cavities were prepared in 15 human molars (mesially and distally). These cavities were later distributed in 3 groups according to the type of resin. Groups A and B were restored with bulk fill resin composites (Filtek—3 M/ESPE and Tetric N-Ceram—Ivoclar/Vivadent respectively) in a single increment of 4 mm. Group C was restored with the Filtek Z350 XT – 3 M/ESPE resin composite and two increments of 2 mm. Later, the restorations were subjected to 10,000 thermocycles between 5 °C to 55 °C and immersed in a silver nitrate solution (1 M for 24 h). The crowns were then sectioned mesiodistally and observed under the stereomicroscope to determine the degree of marginal microleakage at the occlusal and cervical areas. The results were analyzed with the Kruskal–Wallis and the Mann–Whitney U statistical tests. Results There were no statistically significant differences regarding the degree of microleakage between the three types of resin composites in the occlusal and cervical areas (p > 0.05). Similarly, there were no significant differences after comparing each resin type in its occlusal and cervical area (p > 0.05). Conclusion Filtek Bulk Fill and Tetric N-Ceram Bulk Fill resin composites showed no statistically significant differences with the conventional nanohybrid resin composite Filtek Z350XT at both occlusal and cervical areas.César F. Cayo-RojasKaren K. Hernández-CabaAna S. Aliaga-MariñasMarysela I. Ladera-CastañedaLuis A. Cervantes-GanozaBMCarticleMonoblock resinComposite resinMarginal adaptationMicroleakageMolarMono incremental resinDentistryRK1-715ENBMC Oral Health, Vol 21, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Monoblock resin Composite resin Marginal adaptation Microleakage Molar Mono incremental resin Dentistry RK1-715
spellingShingle	Monoblock resin Composite resin Marginal adaptation Microleakage Molar Mono incremental resin Dentistry RK1-715 César F. Cayo-Rojas Karen K. Hernández-Caba Ana S. Aliaga-Mariñas Marysela I. Ladera-Castañeda Luis A. Cervantes-Ganoza Microleakage in class II restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles
description	Abstract Background The contraction presented by resin composites causes an increase in stress at the tooth-resin interface, causing micro-gaps that allow microleakage. This study aims to evaluate the degree of in vitro marginal microleakage in class II restorations with two bulk fill resin composites compared to a conventional nanohybrid resin composite. Methods The present study was an in vitro experimental design. A total of 30 standardized class II cavities were prepared in 15 human molars (mesially and distally). These cavities were later distributed in 3 groups according to the type of resin. Groups A and B were restored with bulk fill resin composites (Filtek—3 M/ESPE and Tetric N-Ceram—Ivoclar/Vivadent respectively) in a single increment of 4 mm. Group C was restored with the Filtek Z350 XT – 3 M/ESPE resin composite and two increments of 2 mm. Later, the restorations were subjected to 10,000 thermocycles between 5 °C to 55 °C and immersed in a silver nitrate solution (1 M for 24 h). The crowns were then sectioned mesiodistally and observed under the stereomicroscope to determine the degree of marginal microleakage at the occlusal and cervical areas. The results were analyzed with the Kruskal–Wallis and the Mann–Whitney U statistical tests. Results There were no statistically significant differences regarding the degree of microleakage between the three types of resin composites in the occlusal and cervical areas (p > 0.05). Similarly, there were no significant differences after comparing each resin type in its occlusal and cervical area (p > 0.05). Conclusion Filtek Bulk Fill and Tetric N-Ceram Bulk Fill resin composites showed no statistically significant differences with the conventional nanohybrid resin composite Filtek Z350XT at both occlusal and cervical areas.
format	article
author	César F. Cayo-Rojas Karen K. Hernández-Caba Ana S. Aliaga-Mariñas Marysela I. Ladera-Castañeda Luis A. Cervantes-Ganoza
author_facet	César F. Cayo-Rojas Karen K. Hernández-Caba Ana S. Aliaga-Mariñas Marysela I. Ladera-Castañeda Luis A. Cervantes-Ganoza
author_sort	César F. Cayo-Rojas
title	Microleakage in class II restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles
title_short	Microleakage in class II restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles
title_full	Microleakage in class II restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles
title_fullStr	Microleakage in class II restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles
title_full_unstemmed	Microleakage in class II restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles
title_sort	microleakage in class ii restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles
publisher	BMC
publishDate	2021
url	https://doaj.org/article/266abf1ac64840e68eed1b7374b996dc
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Microleakage in class II restorations of two bulk fill resin composites and a conventional nanohybrid resin composite: an in vitro study at 10,000 thermocycles

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