How it Works
An electric toothbrush motor works due to an electric charge produced by a small battery in the toothbrush. Some electric toothbrushes work by inductive charging, which is when two parts of a transformer inside the brush are brought together and a small magnetic field creates an electric current to charge the battery. When the charge activates the motor, it creates a vibrating and oscillating effect, and a series of rods and receptors carries this motion all the way to the brush, causing it to spin. Other electric toothbrushes are operated by disposable, replaceable or rechargeable batteries. The electronic compartments of the toothbrushes are sealed to prevent water from seeping in and damaging the product.
Effectiveness
Research has actually shown that an electric toothbrush doesn't work much better than a manual toothbrush. Even oscillating electric toothbrushes are only slightly more effective than regular brushes. One benefit of the electric toothbrush is the timer. The 2-minute timer encourages people to brush longer, whereas with a manual toothbrush, brushing time varies and most people do not brush for an adequate amount of time. Studies have shown that most inadequate dental hygiene is a direct result of brushing for less than 2 minutes and sometimes for less than 1 minute.
Tags: electric toothbrush, electric toothbrushes, less than, manual toothbrush, people brush