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Hydrogen peroxide decomposition in the oral cavity
M V Marshall1, P P Gragg, E W Packman
1Department of Dental Diagnostic Sciences, University of Texas Health Science Center at San Antonio, USA. M_Marshall@msn.com
American Journal of Dentistry
|January 25, 2002
Summary
Hydrogen peroxide (H2O2) is rapidly cleared from the mouth after brushing. Baking soda significantly enhances H2O2 decomposition, minimizing oral soft tissue exposure.
Area of Science:
- Oral hygiene research
- Pharmacokinetics of oral care agents
- Dental product formulation
Background:
- Hydrogen peroxide (H2O2) is a common ingredient in oral care products for its antimicrobial and whitening properties.
- Understanding the clearance and decomposition kinetics of H2O2 in the oral cavity is crucial for safety and efficacy assessments.
Purpose of the Study:
- To determine the oral clearance rate of hydrogen peroxide (H2O2) across different age groups and in individuals with impaired salivary flow.
- To evaluate the impact of dentifrice formulation, specifically the inclusion of baking soda, on H2O2 clearance.
Main Methods:
- Subjects (infants, juveniles, adults, adults with impaired salivary flow) brushed with a 3% H2O2 dentifrice.
- Oral H2O2 levels were measured for up to 9 minutes post-brushing.
- Clearance of 3% H2O2 in a baking soda dentifrice was assessed in adults.
Main Results:
- Over 70% of hydrogen peroxide (H2O2) decomposed during a 1-minute brushing period.
- No significant differences in H2O2 clearance were observed between infants, juveniles, and adults.
- Baking soda in the dentifrice enhanced H2O2 decomposition approximately six-fold in adults, with less than 5% remaining after 1 minute.
Conclusions:
- Hydrogen peroxide (H2O2) demonstrates rapid clearance from the oral cavity across all tested age groups and in individuals with reduced salivary flow.
- The presence of baking soda in dentifrices significantly accelerates H2O2 decomposition, reducing potential soft tissue interaction.
- Minimal H2O2 remains in the oral cavity post-brushing and expectoration, suggesting a favorable safety profile for H2O2-containing dentifrices.
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