Journal article
Experimental etch-and-rinse adhesives doped with bioactive calcium silicate-based micro-fillers to generate therapeutic resin–dentin interfaces
Dental materials, Vol.29(7), pp.729-741
07/01/2013
DOI: 10.1016/j.dental.2013.04.001
PMID: 23639454
Abstract
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.
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% H3PO4-etched dentin and light-cured for 30s. After build-ups, they were prepared for micro-tensile bond strength (μTBS) and tested after 24h 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.
High μTBS values were achieved in all groups after 24h. 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.
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.
Details
- Title: Subtitle
- Experimental etch-and-rinse adhesives doped with bioactive calcium silicate-based micro-fillers to generate therapeutic resin–dentin interfaces
- Creators
- A.C. Profeta - King's College LondonF. Mannocci - King's College LondonR. Foxton - King's College LondonT.F. Watson - St Thomas' HospitalV.P. Feitosa - University of Iowa, Operative DentistryB. De Carlo - University of BolognaR. Mongiorgi - University of BolognaG. Valdré - University of BolognaS. Sauro - King's College London
- Resource Type
- Journal article
- Publication Details
- Dental materials, Vol.29(7), pp.729-741
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.dental.2013.04.001
- PMID
- 23639454
- ISSN
- 0109-5641
- eISSN
- 1879-0097
- Language
- English
- Date published
- 07/01/2013
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984655342702771
Metrics
6 Record Views