Journal article
Changes in the stiffness of demineralized dentin following application of tooth whitening agents
Acta odontologica Scandinavica, Vol.70(1), pp.56-60
01/01/2012
DOI: 10.3109/00016357.2011.575176
PMID: 21492064
Abstract
Objective
. The purpose of this study was to evaluate the effect of the bleaching agents on the elastic modulus of bovine demineralized dentin matrix (EMDM).
Materials and methods.
Eighty-five slices were obtained from 17 bovine teeth. The slices were divided randomly into five experimental groups (n = 17): unbleached control group (CG), 4% hydrogen peroxide (HP4), 4% hydrogen peroxide + 0.05% Ca (HP4 + Ca), 7.5% hydrogen peroxide + ACP (HP7.5) and 10% carbamide peroxide (CP10). The HP4, HP4 + Ca and CP10 groups were treated with the bleaching agents for 8 h/day (14 days), while the samples of HP7.5 group were exposed to bleaching agent for 30 min twice a day (14 days). The CG was kept in 100% humidity. After bleaching treatments, the enamel of the samples was removed and 85 dentin beams (0.5 × 1.7 × 7.0 mm) were prepared. Afterwards, the beams were immersed in 10% phosphoric acid solution (5 h) and rinsed with water (10 min). The beams were tested after 24 h, 7 and 14 days of storage in distilled water, using three-point bend method. Data were statistically analyzed using ANOVA and Fisher's test.
Results.
All bleaching treatments reduced the EMDM. After 14 days post-bleaching, the EMDM increased for HP4 and HP4+Ca groups.
Conclusions.
The use of bleaching agents promoted a decrease in EMDM, which indicates that the bleaching treatment interacts with the dentin organic matrix. The EMDM measurement for the specimens of the 7.5% hydrogen peroxide group that were immersed in water at 14 days post-bleaching did not recover the EMDM values when compared to the control group.
Details
- Title: Subtitle
- Changes in the stiffness of demineralized dentin following application of tooth whitening agents
- Creators
- Sandrine Bittencourt Berger - Department of Restorative DentistrySabrina Pavan - Department of Restorative DentistryCristina de Mattos Pimenta Vidal - Department of Restorative DentistryPaulo Henrique Dos Santos - Department of Dental Materials and ProsthodonticsMarcelo Giannini - Department of Restorative DentistryAna Karina Bedran-Russo - Department of Restorative Dentistry
- Resource Type
- Journal article
- Publication Details
- Acta odontologica Scandinavica, Vol.70(1), pp.56-60
- DOI
- 10.3109/00016357.2011.575176
- PMID
- 21492064
- NLM abbreviation
- Acta Odontol Scand
- ISSN
- 0001-6357
- eISSN
- 1502-3850
- Publisher
- Taylor & Francis
- Language
- English
- Date published
- 01/01/2012
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984065705702771
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