Specially Designed for Gentle, Superior Cleaning* Features extra soft bristles for sensitive gums. #1 Dentist Recommended Toothbrush Brand Worldwide â€“ Oral-B. Indicator bristles signal time to replace brush head. Dentists recommend changing your brush every 3 months. 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. *vs. a regular manual toothbrush.