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:: Volume 4, Number 3 (11-2015) ::
3dj 2015, 4(3): 15-22 Back to browse issues page
Effects of Carbamide Peroxide Bleaching Gel on Color of Silorane- and Methacrylate-based Resin Composites
Behnaz Esmaeili, Ghazaleh Ahmadizenouz, Faezeh KhazaeiPoul , Yasaman Samani, Hemmat Gholinia
Dental Student Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
Abstract:   (548 Views)

Introdouction:
Bleaching has become a common treatment for improving the appearance of natural teeth. However, the need to protect dental restorations from bleaching agent exposure is inevitable, as these agents may change the color of restorative materials by oxidation. Filtek P90 composite resin has recently been introduced with the aim of decreasing polymerization shrinkage. The
purpose of this study was to compare the color changes of silorane- and methacrylate-based resin composites after exposure to various carbamideperoxide regimens.
Materials and methods:
Sixty-four disk-shaped specimens (10 × 2 mm) of a microhybrid composite, Z250, and a siloranebased composite, P90, were prepared and divided into four subgroups (n = 8). An unbleached group was used as a control, while the remaining
specimens in the three subgroups were bleached with 10%, 16%, and 22% carbamide peroxide for 14 days. The color was measured with a spectrophotometer using Commission International de I’Eclairage L*, a*, and b* color scale. The data
were analyzed using ANOVA, the t-test, and Tukey’s HSD test.
Results:
Color differences between bleaching and baseline values (&DeltaE) were <3.3 for all the groups. Z250 and P90 resin composites showed color changes after bleaching with 10%, 16%, and 22% carbamide peroxide, but the changes were insignificant
(Z250: p = 0.323, P90: p = 0.136).
Conclusion:
The color changes were not clinically evident in the sample groups. For both the Z250 and P90 specimens, no statistically significant differences in color were noted.

Keywords: Composite Resins, Methacrylates, Silorane Resins, carbamide peroxide, Color
Full-Text [PDF 685 kb]   (345 Downloads)    
Type of Study: Original article | Subject: So on
Received: 2015/12/26 | Accepted: 2015/12/26 | Published: 2015/12/26
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DOI: 10.18869/acadpub.3dj.4.3.15


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Esmaeili B, Ahmadizenouz G, KhazaeiPoul F, Samani Y, Gholinia H. Effects of Carbamide Peroxide Bleaching Gel on Color of Silorane- and Methacrylate-based Resin Composites. 3dj. 2015; 4 (3) :15-22
URL: http://3dj.gums.ac.ir/article-1-181-en.html
Volume 4, Number 3 (11-2015) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی گیلان Journal of Dentomaxillofacial
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