期刊论文详细信息
Brazilian Journal of Oral Sciences
Dental bleaching agents with calcium and their effects on enamel microhardness and morphology
Andréia Mara Andrade Pizani1  Beatriz Tholt1  Sidnei Paciornik1  Katia Regina Hostilio Cervantes Dias1  Pedro Paulo Albuquerque Cavacanti De Albuquerque1  Celso Silva Queiroz1 
关键词: bleaching agents;    calcium;    hydrogen peroxide;    dental enamel;   
DOI  :  10.1590/1677-3225v14n2a11
来源: SciELO
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【 摘 要 】

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.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

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