Clinically proven: Removes plaque 10x better than the brush heads of the best-selling private label in Germany. The original brush heads from Oral-B have been developed with new X-shaped bristles that can now clean areas that regular bristles cannot reach. The green indicator bristles gradually turn yellow depending on individual usage, indicating the optimal time to replace the brush head – for 100% cleaning power. Guaranteed compatibility with all rechargeable Oral-B toothbrushes, except for Pulsonic and iO.