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:: Volume 27, Issue 2 (4-2015) ::
J Iran Dent Assoc 2015, 27(2): 77-84 Back to browse issues page
Comparison of Color Change of Silorane and Methacrylate-Based Composites Due to Bleaching
Sedigheh Hashemi Kamangar *1, Kiyana Kiakojoori2, Mansoreh Mirzaii3, Mohammadjavad Kharazifard4
1- Assistant Professor, Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences. International Campus, Tehran, Iran , hashemi_s@sina.tums.ac.ir
2- Private Dentist
3- Associated Professor, Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran
4- Research Member of Dental Research Center Tehran University of Medical Sciences. Tehran, Iran
Abstract:   (3918 Views)

Background and Aim: Bleaching agents differently affect the color of composite restorations. This study aimed to assess the effect of two different bleaching agents on color change of silorane-based and two types of methacrylate-based composites. Materials and Methods: This in-vitro study was conducted on 18 disc-shaped specimens measuring 10×2mm made of A3 shade of Z250, Z350 and P90 composites. The speci-mens were randomly divided into three groups (n=6). Group one or control samples were stored in distilled water. Groups two and three were subjected to bleaching with 16% and 35% carbamide peroxide (CP) (Kimia, Chemident, Iran). Color parameters of specimens were measured before and after bleaching using the CIE L*a*b* system and a spectrophotometer. Data were analyzed using repeated measures ANOVA and Tukey’s HSD test for multiple comparisons.

Results: The mean and standard deviation (SD) of total color change (&DeltaE) of Z250 in dis-tilled water, 16% carbamide peroxide and 35% carbamide peroxide was 3.48±1.43, 4.55±1.7 and 4.17±1.9, respectively. These values were 4.33±2.41, 4.94±2.23 and 4.25±1.65 for Z350 and 4.97±2.47, 5.28±1.67 and 3.41±2.26 for P90, respectively.

Conclusion: In general, the color change of microhybrid, nanofilled and silorane-based composites following bleaching with different bleaching agents was clinically perceivable.

Keywords: Bleaching, Silorane-based composite, Color, Methacrylate-based composite
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Type of Study: Orginal | Subject: Restorative Dentistry
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Hashemi Kamangar S, Kiakojoori K, Mirzaii M, Kharazifard M. Comparison of Color Change of Silorane and Methacrylate-Based Composites Due to Bleaching. J Iran Dent Assoc 2015; 27 (2) :77-84
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Volume 27, Issue 2 (4-2015) Back to browse issues page
Journal of Iranian Dental Association


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