Table of Contents
International Scholarly Research Notices
Volume 2014, Article ID 610452, 6 pages
http://dx.doi.org/10.1155/2014/610452
Research Article

The Effect of Light Exposure on Water Sorption and Solubility of Self-Adhesive Resin Cements

1Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Avenue Limeira 901, Bairro Areião, 13414-903 Piracicaba, SP, Brazil
2Department of Social Dentistry, Piracicaba Dental School, State University of Campinas, Avenue Limeira 901, Bairro Areião, 13414-903 Piracicaba, SP, Brazil

Received 2 July 2014; Revised 5 September 2014; Accepted 1 October 2014; Published 29 October 2014

Academic Editor: Antonio Apicella

Copyright © 2014 Thaiane Rodrigues Aguiar 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

Purpose. To investigate the effect of light activation on the water sorption (WS) and solubility (SL) of resin cements after 24 h and 7 days. Methods. Disk-shaped specimens were prepared using five dual-polymerized cements (four self-adhesive [RelyX Unicem, MaxCem, SeT and G-Cem] and one conventional [Panavia F 2.0]) and divided according to the curing mode (direct light exposure or self-cure) and water immersion period (24 h or 7 days). Specimens were dry-stored and weighed daily until a constant mass was recorded (M1). Then, specimens were stored in water for either 24 h or 7 days and immediately weighed (M2). After desiccation, specimens were weighed again until a constant mass was achieved (M3). WS and SL were calculated and statistically analyzed by Kruskal-Wallis, Dunn and Mann-Whitney U tests (%). Results. There was a significant increase in WS for all products after one-week immersion in water. The highest water uptake was observed for autopolymerized groups. Extended water immersion significantly affected the SL for most of autopolymerized cements. Significant differences between products were observed in both tests. Conclusions. The curing mode and the water immersion period may affect the mechanical stability of the resin cements, and these differences appear to be product-dependent.