Flared side bristles. Massage & stimulate gums. ADA Accepted (American Dental Association). Sensational cleaning & massaging every time you brush! Uniquely Designed with: 1. Elongated Tip with longer more flexible cleaning bristles. 2. Flared Side Bristles to massage & stimulate gums. The Mentadent Oral Care Brush is accepted as a cleansing device that has been shown to remove plaque and reduce gingivitis when used as directed in a program of good oral hygiene to supplement regular professional care (Council on Scientific Affairs, American Dental Association).