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Research Article

Effect of Three Bleaching Agent on Surface Roughness of Enamel (In-vivo Study)

Sahar Ahmed Mohamed Abd El Halim*

Department of Operative dentistry, Faculty of Oral and Dental Medicine, Misr University for Science and Technology, Egypt and Qassim university, Saudi Arabia

*Corresponding Author:
Sahar Ahmed Mohamed Abd El Halim
Lecturer, Department of Operative Dentistry Qassim University, Saudi Arabia
E-mail: [email protected]

Received date: June 14, 2011; Accepted date: March 26, 2012; Published date: March 28, 2012

Citation: El Halim SAMA (2012) Effect of Three Bleaching Agent on Surface Roughness of Enamel (In-vivo Study). Dentistry 2:133. doi:10.4172/2161-1122.1000133

Copyright: © 2012 El Halim SAMA. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


The purpose of this study was to evaluate the effect of 20% Carbamide peroxide (CP), 10% Carbamide peroxide (CP) and 25% Hydrogen peroxide (HP) on surface roughness of enamel.

Materials and methods: Six young healthy dogs were used in this study. Sixteen teeth in each dog were selected (upper and lower incisors and canines) for bleaching. Group (1): Control, no bleaching treatment (upper & lower canines in each dog). Group (2): (1) & (2) dogs, bleaching of upper &lower incisors with 20% CP Opalescence. Group (3): (3) & (4) dogs, bleaching of upper &lower incisors with 10% CP Opalescence Group (4): (5) & (6) dogs, bleaching of upper &lower incisors with 25% HP Zoom2 N=24 Selected teeth on each dog were scaled and polished with a rubber cup, after that in groups 2,3,4 bleaching agents were applied for eight hours daily for two weeks. After sacrificed of the dogs, the teeth were stored in normal saline 0.9%. Enamelof labial surface of teeth was tested for surface roughness (Ra,um) using Environmental Scanning Electronic Microscope. Data were statistically analyzed using ANOVA followed by Duncan’s Multiple Range Test using SAS program.

Results: No significant differences were found among the bleaching groups (2-3-4). However, all bleaching agents produced a significant increase in the mean surface roughness of enamel compared to the untreated control group (1) (p<0.05).

Conclusion: Different concentration of Carbamide peroxide and Hydrogen peroxide can promote alteration on enamel surface.


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