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International Journal of Dentistry
Volume 2017 (2017), Article ID 1797091, 5 pages
Research Article

Food Simulating Organic Solvents for Evaluating Crosslink Density of Bulk Fill Composite Resin

1Restorative Dental Sciences Department, College of Dentistry, University of Dammam, Dammam, Saudi Arabia
2College of Dentistry, University of Dammam, Dammam, Saudi Arabia

Correspondence should be addressed to Neveen M. Ayad

Received 12 December 2016; Revised 11 March 2017; Accepted 29 March 2017; Published 12 April 2017

Academic Editor: Carlos A. Munoz-Viveros

Copyright © 2017 Neveen M. Ayad 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.


Objectives. To evaluate crosslink densities of two bulk fill composite resins and determine if the used Food Simulating Organic Solvent (FSOS) affected them. Methods. Forty specimens were prepared from SureFill and SonicFill bulk fill composite resins, 20 each. All specimens were stored dry for 24 h. Each group was divided into 2 subgroups: stored in ethanol (E) 75% or in methyl ethyl ketone (MEK) 100% for 24 h. Crosslink density was evaluated by calculating the difference between the Vickers hardness numbers of the specimens stored dry and after their storage in FSOS. The data were statistically analyzed using -test. Results. The means of crosslink density in E and MEK were 6.99% and 9.44% for SureFill and 10.54% and 11.92% for SonicFill, respectively. -test displayed significant differences between crosslink densities of SureFill and SonicFill: () in E and () in MEK and between crosslink densities of SureFill in E and MEK (). Conclusions. Crosslink density of bulk fill composite resin can be evaluated using E or MEK. SureFill has higher crosslink density than SonicFill in both E and MEK.