Effect of bleaching agents on surface texture of feldspathic ceramic

Authors : Çağrı URAL, Yücel GENÇER, Mehmet TARAKÇI, Muhammed Ali ASLAN, Selim ARICI, Numan TATAR
Pages : 177-181
Doi:10.17098/amj.84924
View : 39 | Download : 8
Publication Date : 2014-11-06
Article Type : Research Paper
Abstract :The aims of this study were to evaluate the effects of different carbamide peroxide concentrations on surface structure changes of porcelain restorative materials. A total of 50 discs were made and divided into five groups each include 10 specimens. One group served as control and no bleaching agent was applied. Other groups were immersed in the bleaching gels with the concentration of 10% insert ignore into journalissuearticles values(Group 10);, 15% insert ignore into journalissuearticles values(Group 15);, 20% insert ignore into journalissuearticles values(Group 20);, 35% insert ignore into journalissuearticles values(Group 35); for an average of 8 hours per day. The bleaching procedure was performed over a period of 21 days. The surface roughness values were measured by surface profilometry. Treated ceramic surfaces were examined by scaning electron microscopy insert ignore into journalissuearticles values( SEM); and atomic force microscopy insert ignore into journalissuearticles values( AFM);. The data were analyzed by analysis of variance and post-hoc Tukey test. The results showed that higher concentration of carbamide peroxide gel effect the surface roughness of test specimens significantly. The highest surface roughness values were obtained in group 35 insert ignore into journalissuearticles values(0.57 μm±0.19); and showed significantly different from group C insert ignore into journalissuearticles values(0.24 μm±0.11); which was the lowest surface roughness values. The concentration of the carbamide peroxide bleaching agent used in this study affected the surface roughness of the porcelain test specimens. Ceramic restoration should be protected before any bleaching for preventing negative effects of agent on surface properties. 
Keywords : Bleaching agents, Carbamide peroxide, Ceramic, Surface roughness

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