The Oral-B Pro-Health Vitalizer Advanced toothbrush is clinically proven to remove more plaque than a regular toothbrush. It removes up to 99% of hard to reach plaque*. Our Bacteria Guard Bristles help keep your brush clean for up to three months.** This toothbrush features unique CrossAction Bristles that are angled in opposing directions to lift out and sweep away plaque. Oral-B, Trust the Brand more dentists use themselves worldwide.*Based on a single-use study.**inhibits microbial growth that may affect the bristles. The bristles do no kill bacteria in the mouth or protect you against disease. Always clean the product thoroughly after use.