Effect of Home Bleaching with Carbamide Peroxide and Over-the-Counter Products on Stained Supra-Nano-Filled Composite: An In-Vitro Study.

Authors

• Lynn Harrouk, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon.Follow
• Pascale Habre, Department of Prosthodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon.Follow
• Samar Bou Jaoude, Department of Oral Medicine and Radiology, Saint Joseph University of Beirut, Beirut, Lebanon.Follow
• Carina Mehanna Zogheib, Director of the Postgraduate Program in Restorative and Aesthetic Dentistry, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon.Follow

Abstract

Objective: This study evaluated the impact of home and over-the-counter (OTC) bleaching products, compliant with SCCS regulations, on color changes in tea-stained supra-nano filled composite, using the CIEDE2000 formula.

Methods: One hundred Estelite® Sigma Quick discs were fabricated, thermocycled, and tea-stained for 12 days. Samples were divided into four groups: Opalescence 15% carbamide peroxide (CP) gel, White Dental Beauty 6% hydrogen peroxide (HP) strips, Pola Luminate 6% HP brush-on gel, and a control. Color was measured at baseline, post-staining, and post-bleaching using a VITA EasyShade spectrophotometer. ΔE₀₀ values were analyzed with Kruskal-Wallis and Dunn’s post-hoc tests (p < 0.05).

Results: All bleaching agents significantly reduced discoloration (p < 0.05), with Opalescence showing the greatest effect. However, no product fully restored the baseline shade.

Conclusion: Home bleaching reduced discoloration but did not achieve full-color recovery.

Recommended Citation

Harrouk, Lynn; Habre, Pascale; Bou Jaoude, Samar; and Mehanna Zogheib, Carina (2026) "Effect of Home Bleaching with Carbamide Peroxide and Over-the-Counter Products on Stained Supra-Nano-Filled Composite: An In-Vitro Study.," International Arab Journal of Dentistry: Vol. 17: Iss. 3, Article 11.
DOI: https://doi.org/10.65314/2218-0885.1923
Available at: https://e-journals.usj.edu.lb/iajd/vol17/iss3/11