Specially Designed for Floss Action Superior Cleaning* br Unique Floss Action bristles loosen plaque in-between teeth**. Indicator bristles signal time to replace brush head. 2 Dentists recommend changing your brush every 3 months. 3 #1 Dentist Recommended Toothbrush Brand Worldwide Oral-B. Interchangeable brush head: Floss Action, Pro White, Precision Clean, Sensitive Gum Care, Dual Clean. Compatible with the Oral-B 1000, 3000, 4000, 5000 and 8850 toothbrush handles. Does not fit: Vitality Sonic, Sonic Complete, Pulsonic, CrossAction Power.