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Does cavitation occur around powered toothbrushes?

S C Lea1, G J Price, A D Walmsley

  • 1School of Dentistry, The University of Birmingham, St Chad's Queensway, Birmingham, UK. s.lea@bham.ac.uk

Journal of Clinical Periodontology
|March 17, 2004
PubMed
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This study found no evidence of cavitational activity around five different powered toothbrushes. Even after 20 minutes of operation, the chemical dosimeter system detected no significant hydroxyl radical concentration, indicating safety for oral use.

Area of Science:

  • Dental hygiene
  • Physical chemistry

Background:

  • Powered toothbrushes are widely used for oral hygiene.
  • Understanding potential physical phenomena like cavitation is crucial for product safety.

Purpose of the Study:

  • To investigate the occurrence of cavitational activity around various powered toothbrushes.
  • To assess the safety of powered toothbrush operation using a chemical dosimeter.

Main Methods:

  • A chemical dosimeter system utilizing terephthalic acid (TA) was employed.
  • Five distinct powered toothbrush models were tested in an aqueous TA solution.
  • Fluorescence spectroscopy measured hydroxyl radical concentration as an indicator of cavitation.

Main Results:

  • No detectable cavitational activity was observed around any of the tested powered toothbrushes.

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  • The measured hydroxyl radical concentrations remained below the detection limit (<10(-8) M).
  • Results were consistent for operation times of 10 and 20 minutes.

    • Conclusions:

    • Cavitational activity does not occur around the investigated powered toothbrushes.
    • The use of these powered toothbrushes, even for extended periods, does not generate detectable cavitation.
    • The chemical dosimeter system confirmed the absence of cavitation, supporting product safety.