Elizabeth Gibney in Nature:
Researchers at Peking University in Beijing have developed a battery-less brush that destroys bacteria by generating its own electrical charge, rather than relying on mechanical friction alone. The work was published in Science Advances on 4 November1.
Generating electricity from brushing is a “new twist on an old concept,” says Frank Scannapieco, a periodontist and microbiologist at the University of Buffalo in New York. It might reduce plaque more efficiently, although more tests are needed to prove efficacy and safety, he says. The researchers showed that the novel brush did not damage the tooth surface and was not toxic to human cells, but they did not look at long term safety or cost.
More here.
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