Philips Sonicare A3 Premium All-In-One Standard sonic toothbrush heads, White Brush Heads HX9092/67 for complete care allows extraordinary clean without compromise. The Premium All-in-One brush head has precisely angled bristles which are engineered to maximize its plaque-removing potential. The curved profile helps the bristles to go exactly where they need to. The triangular tips designed to remove stains more effectively than rounded bristles. The shape allows more contact with the surface of your teeth to remove stains effectively. The brush head’s extra-reach side bristles gently brush your gum line even when you are focusing on your teeth. The bristles also flex to help compensate for any excess pressure. Up to 62,000 bristle movements and dynamic fluid action help clean even hard-to-reach areas, leaving your mouth feeling exceptionally fresh and clean. Brush heads become less effective after 3 months of use, but with BrushSync you'll be reminded before this happens. Your BrushSync enabled toothbrush understands your usage and notifies you when it's time for a replacement. This all-in-one brush head is the product of most extensive research and development ever. Combined knowledge from dental professionals, experts in oral care, engineers and designers to bring this holistic brush head to life.