EFFECT OF THE MOUTHWASH CONTAINING CHLORINE DIOXIDE AND CHLORHEXIDINE ON HYDROGEN SULFIDE GAS IN HALITOSIS TREATMENT

Objectives: To evaluate the effectiveness of mouthwash that contains chlorhexidine and chlorine dioxide in neutralizing hydrogen sulfide gas. Methods: Hydrogen sulfide was prepared from sodium sulfide and sulfuric acid, and the amount of gas was calculated by the standard curve method. Evaluate the interaction between hydrogen sulfide gas (H2S) and chlorine dioxide (ClO2) and chlorhexidine (CHX) by letting the H2S gas through the flask containing ClO2 0.05%, 0.1%, and the mixture of ClO2 0.05% + CHX 0.01%, ClO2 0.1% + CHX 0.01%, and performing the UV-vis absorption spectra change of dye solutions. The results were compared to the one when H2S gas passed through water. Results: When the volume of H2S was 0.262 µmol, over 90% of H2S reacted with the mouthwash containing ClO2. As the ClO2 concentration increases, the amount of responding H2S also increases. The CHX + ClO2 mixture did not affect the capacity of H2S neutralization. Conclusion: Chlorine dioxide was a potential agent to reduce the oral unpleasant breath.