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Do powered toothbrushes contaminate toothpaste with metals?

Phillip J Colquitt1

  • 1philjquitt@hotmail.com

The Science of the Total Environment
|June 7, 2002
PubMed
Summary
This summary is machine-generated.

Powered toothbrushes (PTBs) can abrade metal particles, including nickel and chromium, into toothpaste. Tartar control toothpaste showed the highest metal abrasion and caused slurry discoloration, indicating potential oral contamination.

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Dental Materials

Background:

  • Replaceable brush units (RBUs) in powered toothbrushes (PTBs) often incorporate nickel and chromium alloys.
  • These metal components pose a risk of allergenic reactions and oral contamination.
  • Quantification of metal abrasion from PTBs is crucial for assessing potential health risks.

Purpose of the Study:

  • To quantify the amount of metal abraded from powered toothbrush (PTB) replaceable brush units (RBUs).
  • To investigate the potential for metal contamination of toothpaste and the oral cavity.
  • To evaluate the utility of toothpaste slurry discoloration as an indicator of metal abrasion.

Main Methods:

  • A leading brand of powered toothbrush (PTB) was utilized in a simulated intraoral environment.
  • Three leading brands of toothpaste were used in conjunction with the PTB.
  • Post-brushing samples were analyzed by certified laboratories for iron, chromium, nickel, molybdenum, and manganese using standard methods.

Main Results:

  • Tartar control toothpaste demonstrated the highest level of metal abrasion.
  • Metal abrasion resulted in the discoloration of the toothpaste slurry.
  • Toothpaste slurry discoloration was brand-specific and not a universally reliable indicator of metal abrasion.

Conclusions:

  • Powered toothbrushes (PTBs) can release metal particles into the oral environment.
  • The type of toothpaste, particularly tartar control formulations, influences the degree of metal abrasion.
  • Visual indicators like slurry discoloration are not consistently reliable across different toothpaste brands.