This battery-less piezoelectric toothbrush generates electricity every time you brush your teeth and removes more than 99% of plaque in lab tests

ix-ix | 2 hours ago

I wished the tested against electric toothbrush:

Moreover, while the present study com-
pared the self-charged toothbrushes with conventional nylon tooth-
brushes, further comparisons with commercially available electric,
sonic, or antimicrobial-coated alternatives are essential for fully es-
tablishing the translational advantage of the piezoelectric approach
over existing oral care technologies