Abstract
Introduction
This in vitro study compared the tooth color and the ultrastructure of internal dental tissues
before and after internal bleaching.
Methods
Sodium perborate was placed in the pulp chamber of endodontically treated molars and
sealed with intermediate restorative material. The test samples were stored in a physiologic
solution, and the bleaching agent was replaced every 7 days. A control group was used.
After 1 month, the colors of the test and control samples were measured with a colorimeter,
and the internal surfaces were observed under field emission scanning electron microscopy
(FESEM).
Results
Statistically significant differences were found between the test and control sample
colors. The FESEM ultrastructure analysis of the internal enamel and dentin surfaces
did not show any changes after the internal bleaching.
Conclusions
The results of the present study show that sodium perborate is effective in bleaching
nonvital teeth and does not produce ultrastructural changes in the dental tissues.
Key Words
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Article info
Publication history
Published online: December 23, 2009
Identification
Copyright
© 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
