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International Journal of Dentistry
Volume 2011, Article ID 159749, 8 pages
Research Article

Effect of Cavity Configuration (C Factor) on the Marginal Adaptation of Low-Shrinking Composite: A Comparative Ex Vivo Study

Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia

Received 17 April 2011; Revised 12 July 2011; Accepted 14 July 2011

Academic Editor: J. D. Eick

Copyright © 2011 Motaz A. Ghulman. 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.


Aim. To investigate the effect of C factor on marginal adaptation of low-shrinking composite (Silorane).The null hypothesis was that the marginal adaptation of “Silorane” is not affected by the cavity configuration. Materials and Methods. A Silorane based and a methacrylate based composites, with their corresponding self-etch adhesive systems “Filtek Silorane/Silorane Adhesive Bond System and Filtek Z250/Prompt L-Pop’’ respectively were used. Standardized cavities were prepared on the buccal surfaces of 100 maxillary premolars. Teeth were grouped into 5 groups ( 𝑛 = 2 0 ), for the 5 C factors. Restored teeth were subjected to thermocycling. Microleakage testing was done and linear dye penetration was assessed using a stereomicroscope. Statistical analysis was done using the Student’s t-test. Results. For the methacrylate based systems’ overall leakage score was significantly higher than the Silorane-based one ( 𝑃 = 0 . 0 3 4 ). For the methacrylate-based, leakage was found in all tested teeth groups except group 1 (C factor 1/5). For the Silorane, One-way ANOVA revealed a statistically significant increase in dye penetration in the 5th group ( 𝑃 = 0 . 0 1 0 ). Conclusions. The null hypothesis was rejected. The Silorane-based resin although it resulted in a statistically significant good marginal adaptation, it showed tendency toward a high leakage score with C-factor of 5.