Experimental etch-and-rinse adhesives doped with bioactive calcium silicate-based micro-fillers to generate therapeutic resin-dentin interfaces
| Autor: | B. De Carlo, Victor Pinheiro Feitosa, Romano Mongiorgi, Andrea Corrado Profeta, Timothy F. Watson, Giovanni Valdrè, Richard M. Foxton, Francesco Mannocci, Salvatore Sauro |
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| Přispěvatelé: | A.C. Profeta, F. Mannocci, R. Foxton, T.F. Watson, V.P. Feitosa, B. De Carlo, R. Mongiorgi, G. Valdré, S. Sauro |
| Rok vydání: | 2012 |
| Předmět: |
Adult
Dental Stress Analysis Materials science Simulated body fluid Drug Storage Dental Cements Dental bonding law.invention chemistry.chemical_compound Young Adult stomatognathic system law Adhesives Tensile Strength Ultimate tensile strength Materials Testing Dentin medicine Resin-dentin interface Humans General Materials Science Composite material Particle Size General Dentistry Dental Leakage Microscopy Confocal Bond strength Silicates Dental Bonding Calcium Compounds Body Fluids Resin Cements Calcium silicate Portland cement medicine.anatomical_structure chemistry Mechanics of Materials Dentin-Bonding Agents Tooth Remineralization Microscopy Electron Scanning Hydroxide |
| Zdroj: | Dental materials : official publication of the Academy of Dental Materials. 29(7) |
| ISSN: | 1879-0097 |
| Popis: | Objectives This study aimed at evaluating the therapeutic bioactive effects on the bond strength of three experimental bonding agents containing modified Portland cement-based micro-fillers applied to acid-etched dentin and submitted to aging in simulated body fluid solution (SBS). Confocal laser (CLSM) and scanning electron microscopy (SEM) were also performed. Methods A type-I ordinary Portland cement was tailored using different compounds such as sodium–calcium–aluminum–magnesium silicate hydroxide (HOPC), aluminum–magnesium–carbonate hydroxide hydrates (HCPMM) and titanium oxide (HPCTO) to create three bioactive micro-fillers. A resin blend mainly constituted by Bis-GMA, PMDM and HEMA was used as control (RES-Ctr) or mixed with each micro-filler to create three experimental bonding agents: (i) Res-HOPC, (ii) Res-HCPMM and (iii) Res-HPCTO. The bonding agents were applied onto 37% H 3 PO 4 -etched dentin and light-cured for 30 s. After build-ups, they were prepared for micro-tensile bond strength (μTBS) and tested after 24 h or 6 months of SBS storage. SEM analysis was performed after de-bonding, while CLSM was used to evaluate the ultra-morphology/nanoleakage and the mineral deposition at the resin–dentin interface. Results High μTBS values were achieved in all groups after 24 h. Only Res-HOPC and Res-HCPMM showed stable μTBS after SBS storage (6 months). All the resin–dentin interfaces created using the bonding agents containing the bioactive micro-fillers tested in this study showed an evident reduction of nanoleakage and mineral deposition after SBS storage. Conclusion Resin bonding systems containing specifically tailored Portland cement micro-fillers may promote a therapeutic mineral deposition within the hybrid layer and increase the durability of the resin–dentin bond. |
| Databáze: | OpenAIRE |
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