Dental bleaching agents with calcium and their effects on enamel microhardness and morphology
Aim: To evaluate enamel microhardness and morphology after bleaching with hydrogen peroxide containing calcium in different concentrations. Methods: One hundred specimens of human teeth were ground and polished and had the initial microhardness evaluated. The specimens were randomly assigned into fi...
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Universidade Estadual de Campinas
2015-07-01
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doaj-8b6eed8deaa4413a9dd3d8079ed156d62021-07-15T14:03:47ZengUniversidade Estadual de CampinasBrazilian Journal of Oral Sciences1677-32252015-07-0114210.20396/bjos.v14i2.8640831Dental bleaching agents with calcium and their effects on enamel microhardness and morphologyAndréia Mara Andrade Pizani0Beatriz Tholt1Katia Regina Hostilio Cervantes Dias2Pedro Paulo Albuquerque Cavacanti de Albuquerque3Celso Silva Queiroz4Universidade Paulista – UNIPUniversidade Veiga de Almeida – UVAUniversidade Federal do Rio de Janeiro – UFRJUniversidade de São Paulo – USPUniversidade Veiga de Almeida – UVAAim: To evaluate enamel microhardness and morphology after bleaching with hydrogen peroxide containing calcium in different concentrations. Methods: One hundred specimens of human teeth were ground and polished and had the initial microhardness evaluated. The specimens were randomly assigned into five groups (n=20): Group 1 - Control group (no treatment); Group 2 - Home Peroxide 6% (without calcium); Group 3 - Home Peroxide 7.5% (without calcium); Group 4 - White Class 6% (with calcium); Group 5 - White Class 7.5% (with calcium). For each group, the bleaching was performed according to the manufacturer’s specifications. The specimens were bleached once a day for 5 days and subjected to pH cycling. Microhardness and scanning electron microscopy (SEM) analysis were performed before and after bleaching. Results: The results showed that groups submitted to bleaching treatment presented hardness loss compared to the control group. The group of 7.5% hydrogen peroxide with calcium showed a lower percentage of hardness loss in relation to other groups. Conclusion: Calcium in association with a higher hydrogen peroxide concentration may decrease microhardness changes on enamel.https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640831Bleaching agentsCalciumHydrogen peroxideDental enamel |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Andréia Mara Andrade Pizani Beatriz Tholt Katia Regina Hostilio Cervantes Dias Pedro Paulo Albuquerque Cavacanti de Albuquerque Celso Silva Queiroz |
spellingShingle |
Andréia Mara Andrade Pizani Beatriz Tholt Katia Regina Hostilio Cervantes Dias Pedro Paulo Albuquerque Cavacanti de Albuquerque Celso Silva Queiroz Dental bleaching agents with calcium and their effects on enamel microhardness and morphology Brazilian Journal of Oral Sciences Bleaching agents Calcium Hydrogen peroxide Dental enamel |
author_facet |
Andréia Mara Andrade Pizani Beatriz Tholt Katia Regina Hostilio Cervantes Dias Pedro Paulo Albuquerque Cavacanti de Albuquerque Celso Silva Queiroz |
author_sort |
Andréia Mara Andrade Pizani |
title |
Dental bleaching agents with calcium and their effects on enamel microhardness and morphology |
title_short |
Dental bleaching agents with calcium and their effects on enamel microhardness and morphology |
title_full |
Dental bleaching agents with calcium and their effects on enamel microhardness and morphology |
title_fullStr |
Dental bleaching agents with calcium and their effects on enamel microhardness and morphology |
title_full_unstemmed |
Dental bleaching agents with calcium and their effects on enamel microhardness and morphology |
title_sort |
dental bleaching agents with calcium and their effects on enamel microhardness and morphology |
publisher |
Universidade Estadual de Campinas |
series |
Brazilian Journal of Oral Sciences |
issn |
1677-3225 |
publishDate |
2015-07-01 |
description |
Aim: To evaluate enamel microhardness and morphology after bleaching with hydrogen peroxide containing calcium in different concentrations. Methods: One hundred specimens of human teeth were ground and polished and had the initial microhardness evaluated. The specimens were randomly assigned into five groups (n=20): Group 1 - Control group (no treatment); Group 2 - Home Peroxide 6% (without calcium); Group 3 - Home Peroxide 7.5% (without calcium); Group 4 - White Class 6% (with calcium); Group 5 - White Class 7.5% (with calcium). For each group, the bleaching was performed according to the manufacturer’s specifications. The specimens were bleached once a day for 5 days and subjected to pH cycling. Microhardness and scanning electron microscopy (SEM) analysis were performed before and after bleaching. Results: The results showed that groups submitted to bleaching treatment presented hardness loss compared to the control group. The group of 7.5% hydrogen peroxide with calcium showed a lower percentage of hardness loss in relation to other groups. Conclusion: Calcium in association with a higher hydrogen peroxide concentration may decrease microhardness changes on enamel. |
topic |
Bleaching agents Calcium Hydrogen peroxide Dental enamel |
url |
https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640831 |
work_keys_str_mv |
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