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[Comparison of pH in teeth bleaching systems].
A V Akulovich1,2, G G Nikiforova2, A A Korostelev2
1Peoples Friendship University of Russia, Moscow, Russia.
Stomatologiia
|November 1, 2025
Summary
This study found that teeth whitening systems available in Russia have safe pH levels, indicating a low risk of enamel demineralization and tooth sensitivity during bleaching procedures.
Area of Science:
- Dental Materials Science
- Biochemistry
Background:
- Teeth bleaching systems rely on peroxide compounds, with pH and concentration being key parameters.
- Understanding these parameters is crucial for predicting potential risks like enamel demineralization and tooth sensitivity.
Purpose of the Study:
- To evaluate the pH of various teeth bleaching systems to assess risks associated with enamel demineralization and tooth sensitivity.
- To analyze 26 different bleaching materials used in clinical and home settings.
Main Methods:
- Samples of 26 teeth bleaching systems with valid expiration dates were tested.
- A laboratory pH meter "Anion 4100" was used to measure hydrogen ion activity (pH) and oxidation-reduction potential (Eh).
- pH measurements were taken at initial, mixed, and post-application stages to assess stability.
Main Results:
- All tested teeth bleaching systems on the Russian market exhibited pH levels within the normal range.
- No critical pH values were identified, suggesting a low risk of adverse effects.
Conclusions:
- Acidity (pH) and peroxide concentration are critical technical parameters for teeth bleaching gels.
- Lower acidity and concentration are associated with increased patient comfort and reduced tooth sensitivity.
- The findings suggest current market products pose a low risk for enamel demineralization and sensitivity.
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