The sonic toothbrush does establish a truly effective brushing action, primarily because of the high number of brush strokes per minute that these toothbrushes can generate, more than 30,000 brush strokes per minute. Compare that number to the number of brush strokes produced by brushing by your hand which is normally considered to be in the neighborhood of 300 strokes per minute. But are they really worth the money? Hope the explanation here can give you the answer you are looking for.
