Targeting maximum plaque removal in hard-to-reach areas, the Sonicare Adaptive Clean Brush Head’s innovative sonic technology provides a healthier clean by using a flexible adaptive surface that delivers more surface contact. Achieving 31,000 brush strokes per minute, the result is thorough but without sacrificing comfort. As the toothbrush tracks along the gum line, flexible sides and bristles absorb any excess pressure users may apply thus protecting the soft tissue around the gums. The result is a superior yet gentle brush head that can remove up to ten times more plaque from hard-to-reach areas.