Biomimetically-and hydrothermally-grown HAp nanoparticles as reinforcing fillers for dental adhesives
Wagner A, Belli R, Stoetzel C, Hilpert A, Mueller FA, Lohbauer U (2013)
Publication Type: Journal article
Publication year: 2013
Journal
Book Volume: 15
Pages Range: 413-422
Journal Issue: 5
DOI: 10.3290/j.jad.a29534
Abstract
Purpose: Differently prepared hydroxyapatite (HAp) nanoparticles were incorporated into the adhesive solution of a commercial adhesive system in order to evaluate the effect on microtensile bond strength to dentin. Materials and Methods: HAp nanoparticles (20 to 70 nm) were prepared by different processes (biomimetic and hydrothermal) and incorporated into the adhesive of the Adper Scotchbond Multi-Purpose (SBMP) system at various concentrations. Control (unfilled) and experimental groups (filled) were applied onto flat mid-coronal human dentin. Composite crowns were built up and cut into beams with a cross-sectional area of 0.65 ± 0.05 mm2. Specimens were fractured in tension and examined with a scanning electron microscope (SEM) for fractographic analysis. Microtensile bond strength (µTBS) data were analyzed using a two-way ANOVA and modified LSD test at α= 0.05. Analysis of the nanofiller distribution and ultramorphological characterization of the interface was performed by transmission electron microscopy (TEM). Results: HAp nanoparticle incorporation into the adhesive of SBMP significantly influenced µTBS to dentin depending on the fillers and the concentration used. A significant increase of the mechanical strength was obtained for the adhesives containing 1% (wt/vol) biomimetic and 5% hydrothermal silanized HAp particles, while the other particle fractions did not influence µTBS significantly. 10% (wt/vol) HAp particles significantly lowered the µTBS irrespective of the particle type used. TEM micrographs revealed nanoparticle dispersion through the adhesive layer but no deposition on or penetration into the hybrid layer. Conclusions: HAp nanoparticle incorporation into SBMP increased bond strength to dentin by cohesively reinforcing the interface adhesive layer. At a concentration of 10% (wt/vol), nanofiller incorporation had a negative effect on bond strength. © 2013 by Quintessence Publishing Co Inc.
Authors with CRIS profile
Renan Belli
Department of Operative Dentistry and Periodontology
Andrea Hilpert
Lehrstuhl für Mikroskopische Anatomie und Molekulare Zellbiologie
Ulrich Lohbauer
Medizinische Fakultät
Involved external institutions
Germany (DE)How to cite
APA:
Wagner, A., Belli, R., Stoetzel, C., Hilpert, A., Mueller, F.A., & Lohbauer, U. (2013). Biomimetically-and hydrothermally-grown HAp nanoparticles as reinforcing fillers for dental adhesives. Journal of Adhesive Dentistry, 15(5), 413-422. https://doi.org/10.3290/j.jad.a29534
MLA:
Wagner, Andrea, et al. "Biomimetically-and hydrothermally-grown HAp nanoparticles as reinforcing fillers for dental adhesives." Journal of Adhesive Dentistry 15.5 (2013): 413-422.
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