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Type: | Artigo |
Title: | Effect of antioxidants on the dentin interface bond stability of adhesives exposed to hydrolytic degradation |
Author: | Gotti, Valeria B. Feitosa, Victor P. Sauro, Salvatore Correr-Sobrinho, Lourenco Leal, Fernanda B. Stansbury, Jeffrey W. Correr, AmRico B. |
Abstract: | This study assessed the effect of antioxidants vitamin C (Vit. C), vitamin E (Vit. E) and quercetin (Querc) on the dentin bonding performance, degree of conversion, and rate of polymerization of three commercial adhesive systems (Adper Single Bond 2 [SB], Clearfil SE Bond [CSE], Adper Easy Bond [EB]). Human premolars were restored using antioxidant-doped adhesives. The samples were stored for 24 h in distilled water or 6 months under simulated pulpal pressure. Teeth were cut into sticks and the microtensile bond strength (mu TBS) to dentin was tested in a universal testing machine. Qualitative nanoleakage analysis was performed from a central stick of each restored tooth. Degree of conversion and rate of polymerization of adhesive systems were evaluated in triplicate using real-time FT-IR. Although the inclusion of the antioxidants negatively affected the mu TBS over 24 h, the antioxidant-doped adhesives maintained (SB-Vit. C, SB-Vit. E, CSE-Vit. C, EB-Querc) or increased (SB-Querc, CSE-Vit. E, CSE-Querc, EB-Vit. E, and EB-Vit. C) their mu TBS during 6 months of storage. Only the mu TBS of Adper Single Bond 2 dropped significantly after 6 months among the control groups. Slight changes in the nanoleakage pattern after aging were observed in all groups, except for the EB-control group, which showed a noteworthy increase in nanoleakage after 6 months, and for EB-Vit. C, which presented a remarkable decrease. A lower degree of conversion was obtained with all antioxidants in SB and EB, except for the EB-Vit. E group. Similar degrees of conversion were attained in control and experimental groups for CSE. The rate of polymerization was reduced in antioxidant-doped adhesives. The performance of antioxidants changed according to the adhesive system to which they were added, and antioxidant-doped adhesives appear to have a positive effect on the adhesive interface durability, since their bond strength obtained after 24 h was maintained or increased over time |
Subject: | Dentina Adesivos dentinários Desmineralização do dente |
Country: | Reino Unido |
Editor: | Quintessence Publishing |
Rights: | Fechado |
Identifier DOI: | 10.3290/j.jad.a33515 |
Address: | https://jad.quintessenz.de/index.php?doc=abstract&abstractID=33515 |
Date Issue: | 2015 |
Appears in Collections: | FOP - Artigos e Outros Documentos |
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