Long-term nano-mechanical properties of biomodified dentin-resin interface components
| Autor: | Paulo Henrique dos Santos, Sachin Karol, Anakarina B. Bedran-Russo |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Dental composite
Materials science Time Factors Surface Properties Composite number Biomedical Engineering Biophysics Young's modulus Biocompatible Materials Article chemistry.chemical_compound symbols.namesake stomatognathic system Tensile Strength Ultimate tensile strength Materials Testing Dentin medicine Humans Nanotechnology Orthopedics and Sports Medicine Proanthocyanidins Composite material Rehabilitation Adhesiveness Adhesion Elasticity Biomechanical Phenomena stomatognathic diseases Resins Synthetic medicine.anatomical_structure chemistry Glutaral symbols Glutaraldehyde Adhesive Collagen |
| Zdroj: | Journal of biomechanics. 44(9) |
| ISSN: | 1873-2380 |
| Popis: | Failures of dental composite restorative procedures are largely attributed to the degradation of dentin-resin interface components. The 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 nanohardness (H) of major components of the dentin-resin interface (hybrid layer, adhesive layer and underlying dentin) biomodified by collagen cross-linkers at 24hrs, 3 and 6 month 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 months and 6 months when compared to a control. The mechanical properties of the adhesive layer and hybrid layer decreased overtime. The biomodification of the dentin-resin interface structures using GD and GSE can increase the mechanical properties of the interface overtime and may contribute to the long-term quality of adhesive restorations. |
| Databáze: | OpenAIRE |
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