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Effect of In-Office Bleaching on Color and Surface Roughness of Composite Restoratives

OBJECTIVES: The purpose of this study was to determine color changes and surface roughness of composites when they were subjected to in-office bleaching. METHODS: 12 discs 15 mm in diameter and 2 mm thick were prepared from two shades (A2 & A4) of two composites, Durafil VS (DF) and TPH3 (TPH)....

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Autores principales: Hafez, Randa, Ahmed, Doa, Yousry, Mai, El-Badrawy, Wafa, El-Mowafy, Omar
Formato: Texto
Lenguaje:English
Publicado: Dental Investigations Society 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2854328/
https://www.ncbi.nlm.nih.gov/pubmed/20396441
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author Hafez, Randa
Ahmed, Doa
Yousry, Mai
El-Badrawy, Wafa
El-Mowafy, Omar
author_facet Hafez, Randa
Ahmed, Doa
Yousry, Mai
El-Badrawy, Wafa
El-Mowafy, Omar
author_sort Hafez, Randa
collection PubMed
description OBJECTIVES: The purpose of this study was to determine color changes and surface roughness of composites when they were subjected to in-office bleaching. METHODS: 12 discs 15 mm in diameter and 2 mm thick were prepared from two shades (A2 & A4) of two composites, Durafil VS (DF) and TPH3 (TPH). Specimens were polished and stored in distilled water for 24 hours at 37°C before being subjected to bleaching, staining, and re-bleaching. Each of the groups of specimens (DF-A2, DF-A4, TPH-A2 and TPH-A4) were subdivided into three subgroups (n=4) and bleached with Beyond, LumaWhite-Plus, and Opalescence-Boost. Specimens were then stained by immersing them in a coffee solution for 48 hours at 37°C, and then they were re-bleached. Colorimetric measurements were performed at baseline, after bleaching, after staining, and after re-bleaching. Surface roughness was determined with environmental SEM before and after bleaching. Data were statistically-analyzed. RESULTS: None of the bleaching systems notably changed the color of composites (delta-E<2). Coffee staining affected DF specimens more than TPH. Stained specimens showed variable responses to whitening with no significant color change observed with TPH (delta-E<2) and significant changes observed with DF. Surface roughness significantly changed with bleaching, but the degree varied according to composite shade and bleaching agent. CONCLUSIONS: Three in-office bleaching agents had no significant color changes on two composites. DF showed more color change than TPH when immersed in coffee. Stained composites showed different degrees of whitening, with DF showing more response. Bleaching may adversely affect the surface texture of composites. Dentists should take into consideration that composite restorations may not respond to bleaching in the same way that natural teeth do.
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spelling pubmed-28543282010-04-14 Effect of In-Office Bleaching on Color and Surface Roughness of Composite Restoratives Hafez, Randa Ahmed, Doa Yousry, Mai El-Badrawy, Wafa El-Mowafy, Omar Eur J Dent Articles OBJECTIVES: The purpose of this study was to determine color changes and surface roughness of composites when they were subjected to in-office bleaching. METHODS: 12 discs 15 mm in diameter and 2 mm thick were prepared from two shades (A2 & A4) of two composites, Durafil VS (DF) and TPH3 (TPH). Specimens were polished and stored in distilled water for 24 hours at 37°C before being subjected to bleaching, staining, and re-bleaching. Each of the groups of specimens (DF-A2, DF-A4, TPH-A2 and TPH-A4) were subdivided into three subgroups (n=4) and bleached with Beyond, LumaWhite-Plus, and Opalescence-Boost. Specimens were then stained by immersing them in a coffee solution for 48 hours at 37°C, and then they were re-bleached. Colorimetric measurements were performed at baseline, after bleaching, after staining, and after re-bleaching. Surface roughness was determined with environmental SEM before and after bleaching. Data were statistically-analyzed. RESULTS: None of the bleaching systems notably changed the color of composites (delta-E<2). Coffee staining affected DF specimens more than TPH. Stained specimens showed variable responses to whitening with no significant color change observed with TPH (delta-E<2) and significant changes observed with DF. Surface roughness significantly changed with bleaching, but the degree varied according to composite shade and bleaching agent. CONCLUSIONS: Three in-office bleaching agents had no significant color changes on two composites. DF showed more color change than TPH when immersed in coffee. Stained composites showed different degrees of whitening, with DF showing more response. Bleaching may adversely affect the surface texture of composites. Dentists should take into consideration that composite restorations may not respond to bleaching in the same way that natural teeth do. Dental Investigations Society 2010-04 /pmc/articles/PMC2854328/ /pubmed/20396441 Text en Copyright 2010 European Journal of Dentistry. All rights reserved.
spellingShingle Articles
Hafez, Randa
Ahmed, Doa
Yousry, Mai
El-Badrawy, Wafa
El-Mowafy, Omar
Effect of In-Office Bleaching on Color and Surface Roughness of Composite Restoratives
title Effect of In-Office Bleaching on Color and Surface Roughness of Composite Restoratives
title_full Effect of In-Office Bleaching on Color and Surface Roughness of Composite Restoratives
title_fullStr Effect of In-Office Bleaching on Color and Surface Roughness of Composite Restoratives
title_full_unstemmed Effect of In-Office Bleaching on Color and Surface Roughness of Composite Restoratives
title_short Effect of In-Office Bleaching on Color and Surface Roughness of Composite Restoratives
title_sort effect of in-office bleaching on color and surface roughness of composite restoratives
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2854328/
https://www.ncbi.nlm.nih.gov/pubmed/20396441
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