The Oral-B Daily Clean electric toothbrush replacement head features soft bristles for a gentle clean that removes 100% more plaque*, ideal for cleaning around inflamed areas. The round brush head is inspired by dental professional tools for a tooth-by-tooth clean, with specially engineered bristles for optimal tooth coverage. Indicator bristles signal time to replace brush head. Dentists recommend changing your brush head every 3 months. *vs a regular manual toothbrush