| Autor: |
Andréia Mara Andrade Pizani, Beatriz Tholt, Katia Regina Hostilio Cervantes Dias, Pedro Paulo Albuquerque Cavacanti de Albuquerque, Celso Silva Queiroz |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Brazilian Journal of Oral Sciences, Vol 14, Iss 2 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
1677-3225 |
| DOI: |
10.20396/bjos.v14i2.8640831 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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