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Influence of acid etching on hydrogen peroxide diffusion through human dentin
Jean Camps1, Ludovic Pommel, Virginie Aubut
1Laboratory IMEB, Faculty of Odontology, Université de la Méditerranée, Marseille, France. Jcamps2035@aol.com
American Journal of Dentistry
|August 20, 2010
Summary
Dentin etching with phosphoric acid significantly increases hydrogen peroxide diffusion during internal bleaching. This finding is crucial for understanding and optimizing bleaching agent effectiveness in endodontically treated teeth.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomaterials
Background:
- Internal bleaching is a common dental procedure.
- Hydrogen peroxide is the primary bleaching agent used.
- Dentin permeability influences the efficacy of internal bleaching.
Purpose of the Study:
- To investigate the effect of phosphoric acid etching on hydrogen peroxide diffusion through human dentin.
- To assess the impact of dentin surface treatment on internal bleaching outcomes.
Main Methods:
- Human premolars underwent endodontic treatment.
- Access cavities were prepared and either etched with 35% phosphoric acid or left untreated.
- Teeth were filled with 35% hydrogen peroxide gel.
- Hydrogen peroxide diffusion was quantified over seven days.
Main Results:
- A statistically significant increase in hydrogen peroxide diffusion was observed in the group where dentin was etched with phosphoric acid (P < 0.01).
- Etching enhanced the permeability of dentin to the bleaching agent.
Conclusions:
- Phosphoric acid etching of dentin increases hydrogen peroxide diffusion.
- This enhanced diffusion may improve the effectiveness of internal bleaching procedures.
- Further research is warranted to explore clinical implications.
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