In China they created a toothbrush that delivers electricity.
A normal brush works by friction. It removes the plaque mechanically, but does not kill bacteria hiding in this plaque. Scientists from Peking University solved this problem in an unexpected way: they created bristles from a material that generates electricity when it bends.
And the result is impressive: electric bristles destroyed about 53% of the streptococci and 78% of the porphyromones. Ordinary nylon brushes under similar conditions coped with only 9% and 8%, respectively.
- If you wanted such a brush for yourself.