Potential role of surface wettability on the long-term stability of dentin bonds after surface biomodification
| Autor: | Ana K. Bedran-Russo, A.A. Leme, Lina Saleh Hassan, Cristina de Mattos Pimenta Vidal |
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| Rok vydání: | 2015 |
| Předmět: |
Molar
Time Factors Surface Properties Biomedical Engineering Biophysics Dentistry Composite Resins Article Contact angle chemistry.chemical_compound stomatognathic system Adhesives Materials Testing Dentin medicine Humans Orthopedics and Sports Medicine Composite material business.industry Rehabilitation Dental Bonding Chemical modification Denture Retention Elasticity stomatognathic diseases medicine.anatomical_structure chemistry Wettability Adhesive Glutaraldehyde Wetting business Hydrophobic and Hydrophilic Interactions Type I collagen |
| Zdroj: | Journal of Biomechanics. 48:2067-2071 |
| ISSN: | 0021-9290 |
| DOI: | 10.1016/j.jbiomech.2015.03.016 |
| Popis: | Degradation of the adhesive interface contributes to the failure of resin composite restorations. The hydrophilicity of the dentin matrix during and after bonding procedures may result in an adhesive interface that is more prone to degradation over time. This study assessed the effect of chemical modification of dentin matrix on the wettability and the long-term reduced modulus of elasticity (Er) of the adhesive interfaces. Human molars were divided into groups according to the priming solutions: distilled water (control), 6.5% Proanthocyanidin-rich grape seed extract (PACs), 5.75% 1-ethyl-3-[3-dimethylaminopropyl] carbodiimide hydrochloride/1.4% n-hydroxysuccinimide (EDC/NHS) and 5% Glutaraldehyde (GA). The water-surface contact angle was verified before and after chemical modification of the dentin matrix. The demineralized dentin surface was treated with the priming solutions and restored with One Step Plus (OS) and Single Bond Plus (SB) and resin composite. The Er of the adhesive, hybrid layer and underlying dentin was evaluated after 24 h and 30 months in artificial saliva. The dentin hydrophilicity significantly decreased after application of the priming solutions. Aging significantly decreased the Er in the hybrid layer and underlying dentin of control groups. The Er of GA groups remained stable over time at the hybrid layer and underlying dentin. Significant higher Er was observed for PACs and EDC/NHS groups at the hybrid layer after 24 h. The decreased hydrophilicity of the modified dentin matrix likely influence the immediate mechanical properties of the hybrid layer. Dentin biomodification prevented substantial aging at the hybrid layer and underlying dentin after 30 months storage. |
| Databáze: | OpenAIRE |
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