Journal title
عنوان نشریه
Journal of Dentomaxillofacial
Literature & Humanities
http://3dj.gums.ac.ir
1
admin
doi
en
jalali
1394
8
1
gregorian
2015
11
1
4
3
online
1
fulltext
en
Effects of Carbamide Peroxide Bleaching Gel on Color of Silorane- and Methacrylate-based Resin Composites
So on
So on
پژوهشي
Original article
<p dir="ltr"><span style="color:#FF0000">Introdouction:</span><br>
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<br>
purpose of this study was to compare the color changes of silorane- and methacrylate-based resin composites after exposure to various carbamideperoxide regimens.<br>
<span style="color:#FF0000">Materials and methods:</span><br>
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<br>
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<br>
were analyzed using ANOVA, the t-test, and Tukey’s HSD test.<br>
<span style="color:#FF0000">Results:</span><br>
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<br>
(Z250: p = 0.323, P90: p = 0.136).<br>
<span style="color:#FF0000">Conclusion:</span><br>
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.</p>
Composite Resins ,Methacrylates ,Silorane Resins ,carbamide peroxide ,Color
15
22
http://3dj.gums.ac.ir/browse.php?a_code=A-10-1-81&slc_lang=en&sid=1
Behnaz
Esmaeili
No
Dental Materials Research Center, Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
Ghazaleh
Ahmadizenouz
No
Dental Materials Research Center, Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
Faezeh
KhazaeiPoul
Yes
Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
Yasaman
Samani
No
Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran
Hemmat
Gholinia
No
Health Research Institute, Babol University of Medical Sciences, Babol, Iran.