Journal of Conservative Dentistry
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Year : 2012  |  Volume : 15  |  Issue : 2  |  Page : 174-177

Effect of intracoronal bleaching agents on ultrastructure and mineral content of dentin

1 Department of Operative Dentistry, Mashhad Dental School and Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
2 Department of Operative Dentistry, School of Dentistry, Ghazvin University of Medical Sciences, Ghazvin, Iran

Correspondence Address:
Hamideh Ameri
Department of Operative Dentistry, Mashhad Dental School and Dental Research Center, Mashhad University of Medical Science, Mashhad
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-0707.94586

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Aim: The purpose of this in vitro study was to evaluate the ultrastructural changes of dentin induced after exposure to different intracoronal tooth bleaching agents. Materials and Methods: Dental discs of 1 mm thickness were prepared from coronal dentin of sixty-four human maxillary premolars. Experimental specimens were divided into four subgroups: 45% carbamide peroxide, 35% hydrogen peroxide, sodium perborate + 30% hydrogen peroxide, sodium perborate + water. The specimens were then evaluated under scanning electron microscope to determine diameter of dentinal tubules and chemical analysis. Results: There was significant difference between dentinal tubule diameter of all test and control groups with the exception of sodium perborate + water. Chemical analysis revealed that there was no significant difference between experimental subgroups regarding calcium and sulfur wt%. Conclusions: All bleaching agents increased dentinal tubule diameter and promote alterations in mineral content of dentin with the exception of Sodium perborate mixed with water.

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