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Effect of bleaching agents on dentin permeability to Streptococcus faecalis
I Heling1, A Parson, I Rotstein
1Department of Endodontics, The Hebrew University, Hadassah Faculty of Dental Medicine, Jerusalem, Israel.
Journal of Endodontics
|November 1, 1995
Summary
High-concentration hydrogen peroxide bleaching agents significantly increase dentin permeability to Streptococcus faecalis, potentially contributing to root resorption. Sodium perborate with water did not affect permeability.
Area of Science:
- Dental Materials Science
- Microbiology
- Endodontics
Background:
- Bacterial contamination of dentin is implicated in bleaching-associated root resorption.
- Understanding the impact of bleaching agents on dentin permeability is crucial.
Purpose of the Study:
- To evaluate the effect of common bleaching agents on dentin tubule permeability to Streptococcus faecalis.
- To assess the potential role of bleaching agents in bacterial ingress.
Main Methods:
- Sixty bovine incisors were treated with 30% hydrogen peroxide, sodium perborate/hydrogen peroxide, sodium perborate/water, or water.
- Teeth were incubated with Streptococcus faecalis, and bacterial penetration was measured histologically.
Main Results:
- Hydrogen peroxide-containing agents significantly increased dentin permeability to S. faecalis.
- Sodium perborate mixed with water showed no increase in permeability compared to the control.
Conclusions:
- High-concentration hydrogen peroxide bleaching agents may enhance bacterial penetration through dentinal tubules.
- This increased permeability could be a factor in bleaching-associated root resorption.