Effect of several bleaching agents on teeth stained with a resin-based sealer
Article first published online: 5 MAY 2013
© 2013 International Endodontic Journal. Published by John Wiley & Sons Ltd
International Endodontic Journal
Volume 47, Issue 1, pages 3–9, January 2014
How to Cite
Effect of several bleaching agents on teeth stained with a resin-based sealer. International Endodontic Journal, 47, 3–9, 2014., , , , , .
- Issue published online: 9 DEC 2013
- Article first published online: 5 MAY 2013
- Accepted manuscript online: 15 APR 2013 09:23PM EST
- Manuscript Accepted: 29 MAR 2013
- Manuscript Received: 2 JAN 2013
- Isfahan University of Medical Sciences Research. Grant Number: # 389033
- carbamide peroxide;
- endodontic sealer;
- intracoronal bleaching;
- sodium perborate
To evaluate the effect of peroxide-based bleaching agents on teeth stained with AH26 sealer (Dentsply De Trey, Konstanz, Germany), using digital images and computer analysis.
Thirty-five maxillary central incisors were root filled, and the internal walls of the access cavity were coated with AH26 sealer. Internal bleaching commenced 4 months after the root fillings. In three experimental groups (n = 10), the teeth were bleached for 21 days using 45% carbamide peroxide (CP) gel, 45% sodium perborate + carbamide peroxide (SP + CP) or sodium perborate + distilled water (SP + W). No bleaching was undertaken in the control group. Digital images of each specimen were made before treatment, 4 months after endodontic treatment and 2 weeks after bleaching. Colour differences (∆E) were calculated by determining L*a*b* values using digital images and imaging software. Differences between the original colour and sealer-stained teeth, between sealer-stained and bleached teeth and between original colour and bleached teeth were calculated. Data were analysed using one-way anova and Duncan tests (α = 0.05).
Colour differences between baseline and sealer staining were in the range of 8.1–9.9, but differences between the groups were not significant. After bleaching, the degree of lightening was essentially identical for the carbamide peroxide and sodium perborate + carbamide peroxide groups, but was significantly greater (P < 0.05) in these two groups than in the sodium perborate + water group.
For bleaching AH26 sealer-stained teeth, carbamide peroxide gel and carbamide peroxide gel mixed with sodium perborate were equally effective and significantly better than sodium perborate mixed with water.