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International Journal of Dentistry
Volume 2012, Article ID 105863, 6 pages
http://dx.doi.org/10.1155/2012/105863
Research Article

Quantitative Evaluation by Glucose Diffusion of Microleakage in Aged Calcium Silicate-Based Open-Sandwich Restorations

1Department of Operative Dentistry, Faculty of Dentistry, Université de la Méditerrannée, 25 Boulevard Jean Moulin, 13005 Marseille, France
2Department of Operative Dentistry, Faculté d'Odontologie, Université de la Méditerranée, 25 Boulevard Jean Moulin, 13005 Marseille, France
3Department of Operative Dentistry, Faculty of Dentistry, Casablanca, Morocco
4Department of Biomaterials, Faculté d'Odontologie, Université de la Méditerranée, Marseille, France

Received 19 August 2011; Revised 11 October 2011; Accepted 13 October 2011

Academic Editor: Cornelis H. Pameijer

Copyright © 2012 S. Koubi 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

This study compared the in vitro marginal integrity of open-sandwich restorations based on aged calcium silicate cement versus resin-modified glass ionomer cement. Class II cavities were prepared on 30 extracted human third molars. These teeth were randomly assigned to two groups ( 𝑛 = 1 0 ) to compare a new hydraulic calcium silicate cement designed for restorative dentistry (Biodentine, Septodont, Saint Maur des Fossés, France) with a resin-modified glass ionomer cement (Ionolux, Voco, Cuxhaven, Germany) in open-sandwich restorations covered with a light-cured composite. Positive ( 𝑛 = 5 ) and negative ( 𝑛 = 5 ) controls were included. The teeth simultaneously underwent thermocycling and mechanocycling using a fatigue cycling machine (1,440 cycles, 5–55°C; 86,400 cycles, 50 N/cm2). The specimens were then stored in phosphate-buffered saline to simulate aging. After 1 year, the teeth were submitted to glucose diffusion, and the resulting data were analyzed with a nonparametric Mann-Whitney test. The Biodentine group and the Ionolux group presented glucose concentrations of 0.074 ± 0.035 g/L and 0.080 ± 0.032 g/L, respectively. No statistically significant differences were detected between the two groups. Therefore, the calcium silicate-based material performs as well as the resin-modified glass ionomer cement in open-sandwich restorations.