Decomposition Rate, pH, and Enamel Color Alteration of At-Home and In-Office Bleaching Agents
Abstract This study evaluated the decomposition rate (DR), pH, enamel color alteration (DE) and whiteness index (DWI) promoted by at-home and in-office bleaching. Enamel surface was submitted to (n=10): at-home (10%, 15%, 20% carbamide peroxide - CP, 6% hydrogen peroxide -HP) and three 35% HP agents with light irradiation (LED, laser, and halogen) or no treatment (control). The DR and pH of agents were measured after 0, 2, 4, 6 and 8 h (at-home) or after 5, 15, 20, 30 and 40 min (in-office). Color parameters (L*, a*, b*, DE, DWI) were determined at baseline and after bleaching. DR, pH, L*, a*, b* data were analyzed by one-way (at-home) or two-way (in-office) repeated measures ANOVA and Tukey test. DE and DWI, by one-way (at-home) or two-way (in-office) ANOVA and Tukey test. DR of at-home agents was similar after 6 and 8 h (p>0.05), with pH close to neutral (6.5 to 6.9, CP) or acid 5.9 (6% HP). From 4 to 8 h, DE was higher for 15% and 20% CP compared with 10% CP (p<0.05). After 40 min, DR of 35% HP agents was similar and all exhibited significant DE in one application (p<0.05), regardless light irradiation. DWI indicated whitening effect with no differences among groups (p>0.05). One 35% HP showed alkaline pH, and the others, pH < 5.5. At-home agents could be applied for 2 h (15%, 20% CP, 6% HP) and 4 h (10% CP) and the in-office agents, up to 40 min in one application, without light.
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Fundação Odontológica de Ribeirão Preto
2019
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oai:scielo:S0103-644020190004003852019-08-01Decomposition Rate, pH, and Enamel Color Alteration of At-Home and In-Office Bleaching AgentsCavalli,VanessaSilva,Bruna Guerra daBerger,Sandrine BittencourtMarson,Fabiano CarlosTabchoury,Cinthia Pereira MachadoGiannini,Marcelo hydrogen peroxide hydrogen-ion concentration color Abstract This study evaluated the decomposition rate (DR), pH, enamel color alteration (DE) and whiteness index (DWI) promoted by at-home and in-office bleaching. Enamel surface was submitted to (n=10): at-home (10%, 15%, 20% carbamide peroxide - CP, 6% hydrogen peroxide -HP) and three 35% HP agents with light irradiation (LED, laser, and halogen) or no treatment (control). The DR and pH of agents were measured after 0, 2, 4, 6 and 8 h (at-home) or after 5, 15, 20, 30 and 40 min (in-office). Color parameters (L*, a*, b*, DE, DWI) were determined at baseline and after bleaching. DR, pH, L*, a*, b* data were analyzed by one-way (at-home) or two-way (in-office) repeated measures ANOVA and Tukey test. DE and DWI, by one-way (at-home) or two-way (in-office) ANOVA and Tukey test. DR of at-home agents was similar after 6 and 8 h (p>0.05), with pH close to neutral (6.5 to 6.9, CP) or acid 5.9 (6% HP). From 4 to 8 h, DE was higher for 15% and 20% CP compared with 10% CP (p<0.05). After 40 min, DR of 35% HP agents was similar and all exhibited significant DE in one application (p<0.05), regardless light irradiation. DWI indicated whitening effect with no differences among groups (p>0.05). One 35% HP showed alkaline pH, and the others, pH < 5.5. At-home agents could be applied for 2 h (15%, 20% CP, 6% HP) and 4 h (10% CP) and the in-office agents, up to 40 min in one application, without light.info:eu-repo/semantics/openAccessFundação Odontológica de Ribeirão PretoBrazilian Dental Journal v.30 n.4 20192019-07-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402019000400385en10.1590/0103-6440201902484 |
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Cavalli,Vanessa Silva,Bruna Guerra da Berger,Sandrine Bittencourt Marson,Fabiano Carlos Tabchoury,Cinthia Pereira Machado Giannini,Marcelo |
| spellingShingle |
Cavalli,Vanessa Silva,Bruna Guerra da Berger,Sandrine Bittencourt Marson,Fabiano Carlos Tabchoury,Cinthia Pereira Machado Giannini,Marcelo Decomposition Rate, pH, and Enamel Color Alteration of At-Home and In-Office Bleaching Agents |
| author_facet |
Cavalli,Vanessa Silva,Bruna Guerra da Berger,Sandrine Bittencourt Marson,Fabiano Carlos Tabchoury,Cinthia Pereira Machado Giannini,Marcelo |
| author_sort |
Cavalli,Vanessa |
| title |
Decomposition Rate, pH, and Enamel Color Alteration of At-Home and In-Office Bleaching Agents |
| title_short |
Decomposition Rate, pH, and Enamel Color Alteration of At-Home and In-Office Bleaching Agents |
| title_full |
Decomposition Rate, pH, and Enamel Color Alteration of At-Home and In-Office Bleaching Agents |
| title_fullStr |
Decomposition Rate, pH, and Enamel Color Alteration of At-Home and In-Office Bleaching Agents |
| title_full_unstemmed |
Decomposition Rate, pH, and Enamel Color Alteration of At-Home and In-Office Bleaching Agents |
| title_sort |
decomposition rate, ph, and enamel color alteration of at-home and in-office bleaching agents |
| description |
Abstract This study evaluated the decomposition rate (DR), pH, enamel color alteration (DE) and whiteness index (DWI) promoted by at-home and in-office bleaching. Enamel surface was submitted to (n=10): at-home (10%, 15%, 20% carbamide peroxide - CP, 6% hydrogen peroxide -HP) and three 35% HP agents with light irradiation (LED, laser, and halogen) or no treatment (control). The DR and pH of agents were measured after 0, 2, 4, 6 and 8 h (at-home) or after 5, 15, 20, 30 and 40 min (in-office). Color parameters (L*, a*, b*, DE, DWI) were determined at baseline and after bleaching. DR, pH, L*, a*, b* data were analyzed by one-way (at-home) or two-way (in-office) repeated measures ANOVA and Tukey test. DE and DWI, by one-way (at-home) or two-way (in-office) ANOVA and Tukey test. DR of at-home agents was similar after 6 and 8 h (p>0.05), with pH close to neutral (6.5 to 6.9, CP) or acid 5.9 (6% HP). From 4 to 8 h, DE was higher for 15% and 20% CP compared with 10% CP (p<0.05). After 40 min, DR of 35% HP agents was similar and all exhibited significant DE in one application (p<0.05), regardless light irradiation. DWI indicated whitening effect with no differences among groups (p>0.05). One 35% HP showed alkaline pH, and the others, pH < 5.5. At-home agents could be applied for 2 h (15%, 20% CP, 6% HP) and 4 h (10% CP) and the in-office agents, up to 40 min in one application, without light. |
| publisher |
Fundação Odontológica de Ribeirão Preto |
| publishDate |
2019 |
| url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402019000400385 |
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