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|Type:||Artigo de periódico|
|Title:||Can green tea be used to reverse compromised bond strength after bleaching?|
|Abstract:||The objective of this study was to evaluate the antioxidant effect of green tea on microtensile bond strength (TBS) to bleached enamel. Forty-two human third molars were randomly divided into six experimental groups (n=7 each group): group 1, no treatment; group 2, bleaching (10% carbamide peroxide); group 3, bleaching+10% sodium ascorbate gel (SA); group 4, bleaching+10% green tea gel (GT); group 5, SA; and group 6, GT. In groups 2, 3, and 4, bleach was applied onto the enamel surface for 6h, every day for 14d. In groups 3 and 5, SA was applied for 1h; and in groups 4 and 6, GT was applied for 1h. Immediately after treatment, the specimens were bonded with Adper Single Bond 2 and Filtek Z350 XT. The TBS of the specimens was tested using a universal testing machine. Fracture mode analysis of the bonded enamel surface was performed using scanning electron microscopy. The mean TBS values for each group were: group 1, 33.2 +/- 5.8MPa; group 2, 22.6 +/- 5.5MPa; group 3, 30.0 +/- 5.2MPa; group 4, 31.6 +/- 3.8MPa; group 5, 29.1 +/- 4.2MPa; and group 6, 32.2 +/- 4.5MPa. All groups had a higher percentage of mixed failures. In conclusion, green tea can be used as an alternative antioxidant on bleached enamel before bonding procedures.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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