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Updated: Oct 3, 2026

Biofilm Removal Using Carbon Dioxide Aerosols without Nitrogen Purge
Published on: November 6, 2016
[Reducing bacterial aerosols by ultrasonic scaling with Koutai or 1.5% H2O2 pre-rinse]
1Department of Oral Medicine, Affiliated Hospital of Stomatology, School of Medicine Zhejiang University, Hangzhou 310031, China.
Objective:
To compare the effects of Koutai and 1.5% H2O2 on the bacterial aerosol contamination generated by ultrasonic scaling.
Methods:
Aerosol and splatter produced by ultrasonic scaling were collected pre and post rinsing with Koutai or 1.5% H2O2, aerobes and anaerobes were incubated and counted.
Results:
737 CFU aerobes and 749 CFU anaerobes were deducted after rinsing with Koutai, 355 CFU aerobes and 419 CFU anaerobes were deducted after rinsing with 1.5% H2O2. Both groups are effective in reducing aerobes and anaerobes CFUs (P < 0.01), although the former was much better than the latter in the reduction of aerobic CFUs in aerosols (P < 0.05).
Conclusion:
Koutai or 1.5% H2O2 risen can significantly reduce aerobic and anaerobic CFU in aerosols.
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