Peking University researchers create electric toothbrush that generates charge from bristle movement
Researchers at Peking University in Beijing published a study on November 4 describing a battery-less toothbrush that destroys bacteria by generating its own electrical charge.
New mechanism for plaque removal
Traditional brushes rely on motion to manually disrupt plaque films around teeth. The new device uses bristles made from polyvinylidene fluoride, a polymer stretched and heated to obtain its piezoelectric form. Bending these bristles during scrubbing generates an electrical charge that destroys bacteria.
Safety and toxicity findings
The researchers showed the novel brush did not damage the tooth surface. They also found the device was not toxic to human cells. Experts note that more tests are needed to prove long-term efficacy and safety.
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