Dental bleaching agents with calcium and their effects on enamel microhardness and morphology
| Autor: | Sidnei Paciornik, Katia Regina Hostilio Cervantes Dias, Andréia Mara Andrade Pizani, Celso Silva Queiroz, Pedro Paulo Albuquerque Cavacanti de Albuquerque, Beatriz Tholt |
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| Rok vydání: | 2015 |
| Předmět: |
calcium
Morphology (linguistics) Enamel paint business.industry Scanning electron microscope bleaching agents chemistry.chemical_element Dentistry hydrogen peroxide Calcium Peroxide Indentation hardness Ph cycling chemistry.chemical_compound chemistry visual_art visual_art.visual_art_medium dental enamel business Hydrogen peroxide General Dentistry Nuclear chemistry |
| Zdroj: | Brazilian Journal of Oral Sciences, Volume: 14, Issue: 2, Pages: 154-158, Published: JUN 2015 Brazilian Journal of Oral Sciences v.14 n.2 2015 Brazilian journal of oral sciences Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP |
| ISSN: | 1677-3225 |
| DOI: | 10.1590/1677-3225v14n2a11 |
| 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: | OpenAIRE |
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