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Influence of Intermediary Filling Material on Microleakage of Intracoronally Bleached and Restored Teeth

BACKGROUND: Failure of composite restorations in terms of microleakage after intracoronal bleaching has been reported. The purpose of this study was to assess in vitro effect of sodium ascorbate and calcium hydroxide as intermediary filling materials to repair the microleakage associated with adhe-s...

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Autores principales: Khoroushi, Maryam, Feiz, Atieh, Ebadi, Maysam
Formato: Texto
Lenguaje:English
Publicado: Medknow Publications 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3075447/
https://www.ncbi.nlm.nih.gov/pubmed/21528025
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author Khoroushi, Maryam
Feiz, Atieh
Ebadi, Maysam
author_facet Khoroushi, Maryam
Feiz, Atieh
Ebadi, Maysam
author_sort Khoroushi, Maryam
collection PubMed
description BACKGROUND: Failure of composite restorations in terms of microleakage after intracoronal bleaching has been reported. The purpose of this study was to assess in vitro effect of sodium ascorbate and calcium hydroxide as intermediary filling materials to repair the microleakage associated with adhe-sive restoration following intracoronal bleaching. METHODS: Sixty endodontically-treated incisors with access cavities extended to the cementoenamel junction in gingival margin were randomly divided into five equal groups. In group 1, cavities were restored by applying Single Bond and Z100 composite resin. In groups 2-5, 35% hydrogen peroxide gel was placed into the pulp chamber and sealed for 5 days. In group 2, teeth were then restored as in group 1. In groups 3 and 4, 10% sodium ascorbate gel and calcium hydroxide paste were applied in the pulp chamber for 40 hours, removed, rinsed and then, restored. In group 5, the cavities were incu-bated for 7 days and then, restored. Samples were thermocycled, immersed in basic fuschin, and sec-tioned. Dye penetration was scored using a stereomicroscope. Data were analyzed using Kruskal- Wallis and Mann-Whitney U tests (α = 0.05). RESULTS: There was no significant difference in enamel margins (P = 0.163). In dentinal margins (P = 0.003), groups 1, 3 and 5 exhibited similar leakage patterns, each one of groups 1, 3 and 5 had sig-nificant differences with each one of groups 2 and 4. CONCLUSION: Intracoronal bleaching using 35% H2O2 gel increases the microleakage in dentinal margins. Application of the antioxidant agent or a seven-day delay following bleaching may improve the marginal integrity. Applying calcium hydroxide might jeopardize dentinal sealing.
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spelling pubmed-30754472011-04-28 Influence of Intermediary Filling Material on Microleakage of Intracoronally Bleached and Restored Teeth Khoroushi, Maryam Feiz, Atieh Ebadi, Maysam Dent Res J (Isfahan) Original Article BACKGROUND: Failure of composite restorations in terms of microleakage after intracoronal bleaching has been reported. The purpose of this study was to assess in vitro effect of sodium ascorbate and calcium hydroxide as intermediary filling materials to repair the microleakage associated with adhe-sive restoration following intracoronal bleaching. METHODS: Sixty endodontically-treated incisors with access cavities extended to the cementoenamel junction in gingival margin were randomly divided into five equal groups. In group 1, cavities were restored by applying Single Bond and Z100 composite resin. In groups 2-5, 35% hydrogen peroxide gel was placed into the pulp chamber and sealed for 5 days. In group 2, teeth were then restored as in group 1. In groups 3 and 4, 10% sodium ascorbate gel and calcium hydroxide paste were applied in the pulp chamber for 40 hours, removed, rinsed and then, restored. In group 5, the cavities were incu-bated for 7 days and then, restored. Samples were thermocycled, immersed in basic fuschin, and sec-tioned. Dye penetration was scored using a stereomicroscope. Data were analyzed using Kruskal- Wallis and Mann-Whitney U tests (α = 0.05). RESULTS: There was no significant difference in enamel margins (P = 0.163). In dentinal margins (P = 0.003), groups 1, 3 and 5 exhibited similar leakage patterns, each one of groups 1, 3 and 5 had sig-nificant differences with each one of groups 2 and 4. CONCLUSION: Intracoronal bleaching using 35% H2O2 gel increases the microleakage in dentinal margins. Application of the antioxidant agent or a seven-day delay following bleaching may improve the marginal integrity. Applying calcium hydroxide might jeopardize dentinal sealing. Medknow Publications 2009 /pmc/articles/PMC3075447/ /pubmed/21528025 Text en © Dental Research Journal http://creativecommons.org/licenses/by/2.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Khoroushi, Maryam
Feiz, Atieh
Ebadi, Maysam
Influence of Intermediary Filling Material on Microleakage of Intracoronally Bleached and Restored Teeth
title Influence of Intermediary Filling Material on Microleakage of Intracoronally Bleached and Restored Teeth
title_full Influence of Intermediary Filling Material on Microleakage of Intracoronally Bleached and Restored Teeth
title_fullStr Influence of Intermediary Filling Material on Microleakage of Intracoronally Bleached and Restored Teeth
title_full_unstemmed Influence of Intermediary Filling Material on Microleakage of Intracoronally Bleached and Restored Teeth
title_short Influence of Intermediary Filling Material on Microleakage of Intracoronally Bleached and Restored Teeth
title_sort influence of intermediary filling material on microleakage of intracoronally bleached and restored teeth
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3075447/
https://www.ncbi.nlm.nih.gov/pubmed/21528025
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