Assertion: ultrasonic electric toothbrush | /r/CapableOf | use ultrasonic waves
Facets:
value: to clean the teeth
type: PURPOSE
Source sentences:
text: We’re also starting to see more “ultrasonic” electric toothbrushes, which use ultrasonic waves a million times faster than those used by sonic brushes to break up plaque and kill bacteria.
text: Ultrasonic electric toothbrushes actually use ultrasonic waves to clean the teeth more than the bristles of the brush head.