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[The effect of 2 bleaching agents on the enamel surface. An in-vitro study]
M C Llena Puy1, L Forner Navarro, A Ferrandez
1Departamento de Cirugia, Facultad de Medicina y Odontologia, Universidad de Valencia.
Summary
Hydrogen peroxide and carbamide peroxide whiten teeth effectively. Hydrogen peroxide acts faster, but both yield similar results after six weeks, with distinct effects on enamel surfaces observed under electron microscopy.
Area of Science:
- Dental materials science
- Conservative dentistry
Background:
- Dental bleaching is a common cosmetic procedure.
- Understanding the effects of bleaching agents on dental enamel is crucial for clinical practice.
Purpose of the Study:
- To compare the in vitro effects of hydrogen peroxide and carbamide peroxide on dental surfaces using the Walking bleaching technique.
- To analyze the microstructural changes induced by each bleaching agent.
Main Methods:
- In vitro study utilizing the Walking bleaching technique.
- Application of hydrogen peroxide and carbamide peroxide on dental surfaces.
- Scanning electron microscopy (SEM) for microstructural analysis.
Main Results:
- Hydrogen peroxide demonstrated faster initial bleaching compared to carbamide peroxide.
- After six weeks, both agents achieved comparable whitening results.
- SEM revealed distinct surface alterations: carbamide peroxide caused uniform enamel prism opening, while hydrogen peroxide induced more significant superficial destruction with acid-etch-like patterns and crystalline formations.
Conclusions:
- Both hydrogen peroxide and carbamide peroxide are effective bleaching agents.
- The choice of agent may influence the degree and type of enamel surface alteration.
- Further research is needed to correlate these microstructural changes with long-term clinical outcomes.