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Effect of mouthguard bleaching on enamel surface
A Ben-Amar1, R Liberman, C Gorfil
1Department of Operative Dentistry, The Maurice and Gabriela Goldschleger, School of Dental Medicine, Tel Aviv University, Israel.
American Journal of Dentistry
|February 1, 1995
Summary
Home teeth whitening with carbamide peroxide mouthguards can create enamel porosity, significantly reducing resin composite bond strength. This impacts dental restoration durability after bleaching.
Area of Science:
- Dental Materials Science
- Biomaterials
- Surface Science
Background:
- Home teeth whitening using carbamide peroxide is popular.
- The effect of bleaching agents on enamel surface integrity and restorative material adhesion requires thorough investigation.
Purpose of the Study:
- To assess the in vitro impact of 10% carbamide peroxide mouthguard application on resin composite shear bond strength to bleached enamel.
- To evaluate morphological alterations on bleached enamel surfaces.
Main Methods:
- Thirty extracted anterior teeth were divided into control and test groups.
- The test group underwent a 21-day bleaching protocol with 10% carbamide peroxide, followed by SEM evaluation and shear bond strength testing of resin composite restorations.
- The control group was treated with water-soaked cotton wool.
Main Results:
- Carbamide peroxide bleaching resulted in observable enamel porosity.
- A significant reduction in the shear bond strength of resin composite to bleached enamel surfaces was recorded.
Conclusions:
- Home bleaching with 10% carbamide peroxide can compromise the bond strength of resin composites to enamel.
- Enamel surface alterations, including porosity, may contribute to reduced adhesion, potentially affecting the longevity of dental restorations.