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Philips Sonicare 4100 Power Toothbrush. $30 $50 Save $20 ... This is just about the lowest price we've seen this set marked down to (over 70% off). ... "The design is simple, the parts easy to ...
The Burst Original has a lot of the features of Oral-B or Philips Sonicare brushes, without the hefty price tag. The Burst brush “offers a subscription service for toothbrush head replacements ...
Amazon just slashed prices on one of the most buzzed-about electric toothbrushes out there. Today only, grab a Philips Sonicare electric toothbrush at Amazon for $60 off: 'My teeth feel so amazing ...
A Philips Sonicare 5100. This model has 2 cleaning modes . The brush head vibrates at hundreds of times per second, with the latest models at 31,000 strokes per minute (517 Hz) or 62,000 movements per minute [1] (1033 Hz).
Electric toothbrushes can also be classified according to the speed of their movements as standard power toothbrushes, sonic toothbrushes or ultrasonic toothbrushes. If the motion of the toothbrush is sufficiently rapid to produce a hum in the audible frequency of human range (20 Hz to 20,000 Hz), it can be classified as a sonic toothbrush.
Europeans found the hog bristle toothbrushes imported from China too firm and preferred softer bristle toothbrushes made from horsehair. [7] Mass-produced toothbrushes made with horse or boar bristle continued to be imported to Britain from China until the mid 20th century. [6] 'Indexo' finger toothbrush, New York, United States, 1901–1919.
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