This self-powered toothbrush makes electricity to kill cavity-causing bacteria
Researchers have created a self-charging toothbrush that helps fight the bacteria linked to cavities and gum disease while preventing plaque buildup.
Researchers have created a toothbrush that generates electricity while being used, which they say can help kill cavity-causing bacteria. The brush features bristles made of polyvinylidene fluoride (PVDF), a plastic that produces electricity when bent or flexed. During brushing, this electrical activity is thought to generate reactive oxygen species (ROS) that can damage bacteria.
Tests showed the electric toothbrush killed more than half of Streptococcus mutans bacteria, which cause tooth decay, compared to just 9% killed by regular nylon bristles. It also reduced gum disease-causing bacteria like Porphyromonas gingivalis by up to 78%. However, the effect of the ROS appears to be crucial, as the brush's antibacterial properties were diminished when antioxidant compounds were added.
Initial human trials involving 115 adults with gum inflammation or tooth decay showed the electric brush reduced plaque, gum inflammation, and bleeding compared to regular brushes. Further safety and efficacy testing is needed before the toothbrush could be widely used.
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