Apart from the electric toothbrush for children, you will find that the Braun electric toothbrush and the Braun Oral B electric toothbrush in particular, are also recommended by some dentists. The latest addition to this selection of modern toothbrushes is the Braun Sonic toothbrush which is a whole new ball game.
The cleansing action of these brushes is based on a technology that makes it possible for them to have a cleaning effect beyond where the tips of their bristles actually touch. This is the only type of electric toothbrush that can make this claim. It's easy to identify a sonic toothbrush by the high rate of speed with which its brush head vibrates. These brushes are capable of creating in excess of 30,000 brushstrokes-per-minute.
In comparison, conventional electric toothbrushes typically operate at frequencies ranging between 2,500 and 7,500 strokes-per-minute. It's this high rate of vibrational motion that sets sonic brushes apart from all previous generations of electric-toothbrush design. For a little bit of perspective, the old-fashioned way of brushing your teeth rings in about 300 strokes per minute -- if you brush properly. So over the two-minute recommended brushing time, your teeth are hit with 600 strokes … a far cry from the thousands you might get with the high-tech variety.
How does a Sonic toothbrush work?
The tooth-cleansing ability of a sonic brush is due to two separate mechanisms. One is conventional. The second is based on sonic technology (and is entirely unique to this type of brush).
Mechanical scrubbing
The biggest part of the cleaning action generated by a sonic toothbrush is produced by the scrubbing action of its bristles on the surface of the user's teeth. Of course this method of cleaning teeth is not new. All toothbrushes, both electric and manual, rely on this same principle for removing dental plaque.
Fluid dynamics
Sonic toothbrushes also create a secondary cleaning action. This one's created by the intense speed with which their bristles vibrate. This bristle motion is able to impart energy to the fluids that surround teeth. In turn, these agitated fluids are able to disrupt dental plaque, even beyond where the bristles actually touch.
Electric toothbrushes were first introduced in the U.S. in 1960.Today, there are dozens of different brands available, with a myriad of features, including re-chargeable batteries, compact designs, and bristles built for optimal cleaning. These days it is normal practice to buy an electric toothbrush for children.