Circular power bristles. ADA Accepted: American Dental Association. New look. Circular power bristles to help remove tooth stains. ADA Accepted - American Dental Association: The ADA Council on Scientific Affairs' Acceptance of the Colgate Extra Clean Toothbrush is based on its finding that the product is effective for removing plaque and helping to prevent and reduce gingivitis, when used as directed. Dentist and hygienists recommend replacing your toothbrush every 3 months. Save Water: www.colgate.com/savewater. Questions? 1-800-468-6502. www.colgate.com. Made in China.