Power toothbrush

特許 権利維持 An electric toothbrush performs oscillations or rotations of its bristles, driven by a motor. Most studies report a medical performance equal to the one of manual brushes,[19] the electric version can be more comfortable, and an additional timer and pressure sensors can encourage a correct cleaning process.[20] Electric toothbrushes can be classified according to the speed of their movements as standard power toothbrushes, sonic toothbrushes or ultrasonic toothbrushes. Any electric toothbrush is technically a power toothbrush. If the motion of the toothbrush is sufficiently rapid to produce a hum in the audible frequency range (20Hz to 20,000Hz), it can be classified as a sonic toothbrush.