Effect of sodium ascorbate on tag formation in bleached enamel
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Updated: Jun 1, 2026

Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
Published on: March 29, 2018
André Luiz Fraga Briso1, Roberta Mariano Toseto, Vanessa Rahal
1Department of Restorative Dentistry, UNESP, São Paulo State University, Araçatuba, São Paulo, Brazil. alfbriso@foa.unesp.br
Purpose:
This study analyzed the influence of 10% sodium ascorbate (SA) on tag formation in bleached enamel.
Materials And Methods:
Five groups were tested: G1 - control; G2 - bleaching with 10% carbamide peroxide (CP) + restoration; G3 - CP + SA + restoration; G4 - bleaching with 35% hydrogen peroxide (HP) + restoration; and G5 - HP + SA + restoration. The teeth were sectioned and decalcified, and the resin tags were analyzed at 400X magnification using an optical light microscope and Axiovision software.
Results:
The resin tag lengths in µm for each group were as follows: G1 - 36.1A; G2 - 5.8C; G3 - 14.4B; G4 - 1.7D; G5 - 6.5C. Different letters indicate statistically significant differences.
Conclusion:
Tooth bleaching with CP or HP impairs the formation of resin tags, and the utilization of sodium ascorbate increases tags length.
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