Effect of Sodium Ascorbate or Alpha-Tocopherol on the Resin-Dentin Interface and Bond Strength after Endodontic Treatment and Bleaching

ABSTRACT: The objective of this in vitro study was to assess the effects of two antioxidants (sodium ascorbate [SA] and alpha-tocopherol [AT]) on the adhesive interface and dentin bond strength immediately after bleaching with 38 % hydrogen peroxide (38HP) in endodontically-treated teeth. Two stages...

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Autores principales:	Silva,Aryvelto Miranda, Jordão-Basso,Keren Cristina Fagundes, Alencar,Cristiane de Melo, Zaniboni,Joissi Ferrari, Alves-de-Campos,Edson, Kuga,Milton Carlos
Lenguaje:	English
Publicado:	Universidad de La Frontera. Facultad de Medicina 2021
Materias:	bleaching alpha-tocopherol sodium ascorbate bond strength hybrid layer
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-381X2021000300586
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spelling	oai:scielo:S0718-381X20210003005862021-09-21Effect of Sodium Ascorbate or Alpha-Tocopherol on the Resin-Dentin Interface and Bond Strength after Endodontic Treatment and BleachingSilva,Aryvelto MirandaJordão-Basso,Keren Cristina FagundesAlencar,Cristiane de MeloZaniboni,Joissi FerrariAlves-de-Campos,EdsonKuga,Milton Carlos bleaching alpha-tocopherol sodium ascorbate bond strength hybrid layer ABSTRACT: The objective of this in vitro study was to assess the effects of two antioxidants (sodium ascorbate [SA] and alpha-tocopherol [AT]) on the adhesive interface and dentin bond strength immediately after bleaching with 38 % hydrogen peroxide (38HP) in endodontically-treated teeth. Two stages of experimentation were carried out. Bovine incisors were allocated into four groups (n = 10/group for each experiment): NB, non-bleached restored crowns; 38HP, bleached and immediately restored crowns; 38HP-SA, bleached crowns and SA use; and 38HP-AT, bleached crowns and AT use. Hybrid layer length in dentin (μm) and bond strength (MPa) were assessed with confocal microscopy laser and micro-shear bond strength (μSBS) test, respectively. Failure mode was determined by stereomicroscope. Data analysis was performed with analysis of variance (ANOVA) and Kruskal-Wallis, Dunn, Tukey, and Fisher-exact tests (a = 0.05). Higher values of hybrid layer length were observed similarly in the NB and 38HP-SA groups. The highest μSBS mean values were observed in the NB group (18 .51 ? 1.33), whereas the SBS values for 38HP-AT (1.68 ? 0.32) were similar to the 38HP group (1.61 ? 0.51) (p > 0.05) and significantly lower than the 38HP-SA group (5.78 ? 0.71). Adhesive failures were predominant in the 38HP and 38HP-AT groups. Cohesive and mixed failures were mostly observed in the NB and 38HP-SA groups, respectively. In conclusion, AT has no immediate effect on the hybrid layer formation and μSBS of dentin. Although SA promotes an increase in hybrid layer formation, it was not reflected in the μSBS values.info:eu-repo/semantics/openAccessUniversidad de La Frontera. Facultad de MedicinaInternational journal of odontostomatology v.15 n.3 20212021-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-381X2021000300586en10.4067/S0718-381X2021000300586
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	bleaching alpha-tocopherol sodium ascorbate bond strength hybrid layer
spellingShingle	bleaching alpha-tocopherol sodium ascorbate bond strength hybrid layer Silva,Aryvelto Miranda Jordão-Basso,Keren Cristina Fagundes Alencar,Cristiane de Melo Zaniboni,Joissi Ferrari Alves-de-Campos,Edson Kuga,Milton Carlos Effect of Sodium Ascorbate or Alpha-Tocopherol on the Resin-Dentin Interface and Bond Strength after Endodontic Treatment and Bleaching
description	ABSTRACT: The objective of this in vitro study was to assess the effects of two antioxidants (sodium ascorbate [SA] and alpha-tocopherol [AT]) on the adhesive interface and dentin bond strength immediately after bleaching with 38 % hydrogen peroxide (38HP) in endodontically-treated teeth. Two stages of experimentation were carried out. Bovine incisors were allocated into four groups (n = 10/group for each experiment): NB, non-bleached restored crowns; 38HP, bleached and immediately restored crowns; 38HP-SA, bleached crowns and SA use; and 38HP-AT, bleached crowns and AT use. Hybrid layer length in dentin (μm) and bond strength (MPa) were assessed with confocal microscopy laser and micro-shear bond strength (μSBS) test, respectively. Failure mode was determined by stereomicroscope. Data analysis was performed with analysis of variance (ANOVA) and Kruskal-Wallis, Dunn, Tukey, and Fisher-exact tests (a = 0.05). Higher values of hybrid layer length were observed similarly in the NB and 38HP-SA groups. The highest μSBS mean values were observed in the NB group (18 .51 ? 1.33), whereas the SBS values for 38HP-AT (1.68 ? 0.32) were similar to the 38HP group (1.61 ? 0.51) (p > 0.05) and significantly lower than the 38HP-SA group (5.78 ? 0.71). Adhesive failures were predominant in the 38HP and 38HP-AT groups. Cohesive and mixed failures were mostly observed in the NB and 38HP-SA groups, respectively. In conclusion, AT has no immediate effect on the hybrid layer formation and μSBS of dentin. Although SA promotes an increase in hybrid layer formation, it was not reflected in the μSBS values.
author	Silva,Aryvelto Miranda Jordão-Basso,Keren Cristina Fagundes Alencar,Cristiane de Melo Zaniboni,Joissi Ferrari Alves-de-Campos,Edson Kuga,Milton Carlos
author_facet	Silva,Aryvelto Miranda Jordão-Basso,Keren Cristina Fagundes Alencar,Cristiane de Melo Zaniboni,Joissi Ferrari Alves-de-Campos,Edson Kuga,Milton Carlos
author_sort	Silva,Aryvelto Miranda
title	Effect of Sodium Ascorbate or Alpha-Tocopherol on the Resin-Dentin Interface and Bond Strength after Endodontic Treatment and Bleaching
title_short	Effect of Sodium Ascorbate or Alpha-Tocopherol on the Resin-Dentin Interface and Bond Strength after Endodontic Treatment and Bleaching
title_full	Effect of Sodium Ascorbate or Alpha-Tocopherol on the Resin-Dentin Interface and Bond Strength after Endodontic Treatment and Bleaching
title_fullStr	Effect of Sodium Ascorbate or Alpha-Tocopherol on the Resin-Dentin Interface and Bond Strength after Endodontic Treatment and Bleaching
title_full_unstemmed	Effect of Sodium Ascorbate or Alpha-Tocopherol on the Resin-Dentin Interface and Bond Strength after Endodontic Treatment and Bleaching
title_sort	effect of sodium ascorbate or alpha-tocopherol on the resin-dentin interface and bond strength after endodontic treatment and bleaching
publisher	Universidad de La Frontera. Facultad de Medicina
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-381X2021000300586
work_keys_str_mv	AT silvaaryveltomiranda effectofsodiumascorbateoralphatocopherolontheresindentininterfaceandbondstrengthafterendodontictreatmentandbleaching AT jordaobassokerencristinafagundes effectofsodiumascorbateoralphatocopherolontheresindentininterfaceandbondstrengthafterendodontictreatmentandbleaching AT alencarcristianedemelo effectofsodiumascorbateoralphatocopherolontheresindentininterfaceandbondstrengthafterendodontictreatmentandbleaching AT zanibonijoissiferrari effectofsodiumascorbateoralphatocopherolontheresindentininterfaceandbondstrengthafterendodontictreatmentandbleaching AT alvesdecamposedson effectofsodiumascorbateoralphatocopherolontheresindentininterfaceandbondstrengthafterendodontictreatmentandbleaching AT kugamiltoncarlos effectofsodiumascorbateoralphatocopherolontheresindentininterfaceandbondstrengthafterendodontictreatmentandbleaching
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Effect of Sodium Ascorbate or Alpha-Tocopherol on the Resin-Dentin Interface and Bond Strength after Endodontic Treatment and Bleaching

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