Bacteria Guard Bristles. Removes up to 99% plaque in hard to reach places (based on a single-use study). Helps keep your brush clean (Inhibits microbial growth that may affect the bristles. The bristles do not kill bacteria in the mouth or protect you against disease. Always clean the product thoroughly after use). Oral-B, trust the brand more dentists use themselves worldwide. Why is Pro-Health Vitalizer Advanced right for you? It is clinically proven to remove more plaque than a regular manual brush. It removes up to 99% of hard to reach plaque (Based on a single-use study). Features: Unique CrossAction Bristles are angled in opposing directions to lift out and sweep away plaque; 600 extra long bristles to help clean hard to reach places; Bacteria Guard Bristles help keep your brush clean for up to 3 months (Inhibits microbial growth that may affect the bristles. The bristles do not kill bacteria in the mouth or protect you against disease. Always clean the product thoroughly after use). The dental experts from Oral-B recommend using Crest Pro-Health toothpaste. For more oral care information, visit www.OralB.com or call 1-800-56-OralB (1-800-566-7252). www.pg.com.