Long-term nano-mechanical properties of biomodified dentin-resin interface components
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Data
2011-06-03
Autores
Santos, Paulo Henrique dos [UNESP]
Karol, Sachin
Pedran-Russo, Ana Karina
Título da Revista
ISSN da Revista
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Editor
Elsevier B.V.
Resumo
Failures of dental composite restorative procedures are largely attributed to the degradation of dentin-resin interface components. Biomodification of dentin using bioactive agents may improve the quality and durability of the dentin-resin bonds. The aim of this study was to nanomechanically assess the reduced modulus of elasticity (Er) and nano-hardness (H) of major components of the dentin-resin interface (hybrid layer, adhesive layer and underlying dentin) biomodified by collagen cross-linkers at 24 h, 3 and 6 months following restorative procedure. Demineralized dentin surfaces were biomodified with 5% glutaraldehyde (GD) or 6.5% grape seed extract (GSE) prior to placement of adhesive systems and composite resin. Nano-measurements of the interface components in a fluid cell showed that both agents increased the Er and H of underlying dentin after 3 and 6 months when compared to a control. The mechanical properties of the adhesive and hybrid layers decreased over time. Biomodification of the dentin-resin interface structures using GD and GSE can increase the mechanical properties of the interface over time and may contribute to the long-term quality of adhesive restorations. (C) 2011 Elsevier Ltd. All rights reserved.
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Palavras-chave
Collagen, Adhesion, Mechanical properties, Dentin-resin bonds nanoindentation, Dental adhesive systems, Proanthocyanidin
Como citar
Journal of Biomechanics. Oxford: Elsevier B.V., v. 44, n. 9, p. 1691-1694, 2011.