The Oral-B Pulsar Microban toothbrush has battery powered Vibrating bristles to help breakup plaque between teeth. This toothbrush removes 90% of plaque in hard to reach places. These bristles are protected from bacteria*. Oral-B is #1 Used by Dentists Worldwide. *Inhibits microbial growth of odor-causing bacteria that may affect the bristles. The bristles do not kill bacteria in the mouth or protect against disease. Always clean the product thoroughly after use.