Table of Contents
International Scholarly Research Notices
Volume 2015 (2015), Article ID 874283, 7 pages
http://dx.doi.org/10.1155/2015/874283
Research Article

Calcium Silicate-Based Cements Associated with Micro- and Nanoparticle Radiopacifiers: Physicochemical Properties and Bioactivity

1Department of Restorative Dentistry, Araraquara Dental School, University of Estadual Paulista (UNESP), 14801-903 Araraquara, SP, Brazil
2Institute of Physics, University of São Paulo (USP), São Carlos, SP, Brazil

Received 8 October 2014; Revised 29 January 2015; Accepted 30 January 2015

Academic Editor: Shinn-Jyh Ding

Copyright © 2015 Roberta Bosso-Martelo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective. The aim of this study was to evaluate the physicochemical properties and bioactivity of two formulations of calcium silicate-based cements containing additives (CSCM) or resin (CSCR), associated with radiopacifying agents zirconium oxide (ZrO2) and niobium oxide (Nb2O5) as micro- and nanoparticles; calcium tungstate (CaWO4); and bismuth oxide (Bi2O3). MTA Angelus was used as control. Methods. Surface features and bioactivity were evaluated by scanning electron microscopy and the chemical composition by energy dispersive X-ray spectrometry (EDS-X). Results. CSCM and CSCR presented larger particle sizes than MTA. Hydroxyapatite deposits were found on the surface of some materials, especially when associated with the radiopacifier with ZrO2 nanoparticles. All the cements presented calcium, silicon, and aluminum in their composition. Conclusion. Both calcium silicate-based cements presented composition and bioactivity similar to MTA when associated with the radiopacifiers evaluated.