Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled Composite
Objective. The purpose of this study was to compare the color changes and microhardness of a nanocomposite after four bleaching regimens. Materials. Twenty-five specimens (n=25) were made with a nanocomposite resin (Filtek Supreme XT). The specimens were divided into five groups equally (n=5): bleac...
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| Format: | Article |
| Language: | English |
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Wiley
2009-01-01
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| Series: | International Journal of Dentistry |
| Online Access: | http://dx.doi.org/10.1155/2009/313845 |
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| author | Simone Xavier Silva Costa Anne Buss Becker Alessandra Nara de Souza Rastelli Leonor de Castro Monteiro Loffredo Marcelo Ferrarezi de Andrade Vanderlei Salvador Bagnato |
| author_facet | Simone Xavier Silva Costa Anne Buss Becker Alessandra Nara de Souza Rastelli Leonor de Castro Monteiro Loffredo Marcelo Ferrarezi de Andrade Vanderlei Salvador Bagnato |
| author_sort | Simone Xavier Silva Costa |
| collection | DOAJ |
| description | Objective. The purpose of this study was to compare the color changes and microhardness of a
nanocomposite after four bleaching regimens. Materials. Twenty-five specimens (n=25) were made with a nanocomposite resin (Filtek Supreme XT). The specimens were divided into five
groups equally (n=5): bleaching groups and control group, as follows: G1: artificial saliva at 37∘C; (control) G2: hydrogen peroxide (HP) at 7%; G3: hydrogen peroxide (HP) at 35%; G4: carbamide peroxide (CP) at
10%; G5: carbamide peroxide (CP) 35%. Color measurements were made
with spectrophotometer using CIELAB color scale. The Vickers hardness (VHN) measurements
were performed at the top surface. The data were analyzed with two-way Analysis of Variance. Results. ΔE and VHN mean values into the groups were not statistically different,
however, the VHN mean values before and after storage and bleaching showed statistically
significant differences. Conclusion. Nanocomposite samples showed no significant alteration
(color and microhardness) after bleaching. Thus, no replacement of restorations is required after
bleaching. |
| format | Article |
| id | doaj-art-b85d666cd68b403090f319334a9bf5db |
| institution | Kabale University |
| issn | 1687-8728 1687-8736 |
| language | English |
| publishDate | 2009-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Dentistry |
| spelling | doaj-art-b85d666cd68b403090f319334a9bf5db2025-02-03T01:10:35ZengWileyInternational Journal of Dentistry1687-87281687-87362009-01-01200910.1155/2009/313845313845Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled CompositeSimone Xavier Silva Costa0Anne Buss Becker1Alessandra Nara de Souza Rastelli2Leonor de Castro Monteiro Loffredo3Marcelo Ferrarezi de Andrade4Vanderlei Salvador Bagnato5Department of Restorative Dentistry, Araraquara School of Dentistry, University of São Paulo State, 1680 Humaitá Street 14801-903, Araraquara, SP, BrazilUniversity Center Franciscano (UNIFRA), 1250 Andradas Street 97010-030, Santa Maria, RS, BrazilDepartment of Restorative Dentistry, Araraquara School of Dentistry, University of São Paulo State, 1680 Humaitá Street 14801-903, Araraquara, SP, BrazilDepartment of Restorative Dentistry, Araraquara School of Dentistry, University of São Paulo State, 1680 Humaitá Street 14801-903, Araraquara, SP, BrazilDepartment of Restorative Dentistry, Araraquara School of Dentistry, University of São Paulo State, 1680 Humaitá Street 14801-903, Araraquara, SP, BrazilPhysics Institute of São Carlos, University of São Paulo, 400 Trabalhador São Carlense Avenue 13560-970, São Carlos, SP, BrazilObjective. The purpose of this study was to compare the color changes and microhardness of a nanocomposite after four bleaching regimens. Materials. Twenty-five specimens (n=25) were made with a nanocomposite resin (Filtek Supreme XT). The specimens were divided into five groups equally (n=5): bleaching groups and control group, as follows: G1: artificial saliva at 37∘C; (control) G2: hydrogen peroxide (HP) at 7%; G3: hydrogen peroxide (HP) at 35%; G4: carbamide peroxide (CP) at 10%; G5: carbamide peroxide (CP) 35%. Color measurements were made with spectrophotometer using CIELAB color scale. The Vickers hardness (VHN) measurements were performed at the top surface. The data were analyzed with two-way Analysis of Variance. Results. ΔE and VHN mean values into the groups were not statistically different, however, the VHN mean values before and after storage and bleaching showed statistically significant differences. Conclusion. Nanocomposite samples showed no significant alteration (color and microhardness) after bleaching. Thus, no replacement of restorations is required after bleaching.http://dx.doi.org/10.1155/2009/313845 |
| spellingShingle | Simone Xavier Silva Costa Anne Buss Becker Alessandra Nara de Souza Rastelli Leonor de Castro Monteiro Loffredo Marcelo Ferrarezi de Andrade Vanderlei Salvador Bagnato Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled Composite International Journal of Dentistry |
| title | Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled Composite |
| title_full | Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled Composite |
| title_fullStr | Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled Composite |
| title_full_unstemmed | Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled Composite |
| title_short | Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled Composite |
| title_sort | effect of four bleaching regimens on color changes and microhardness of dental nanofilled composite |
| url | http://dx.doi.org/10.1155/2009/313845 |
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