Clinically confirmed: Removes 10x better plaque*as brush heads of the best -selling own brand in Germany ** (*12 weeks average plaque removal, ** Nielsen trading panel L12M). The original brush heads from Oral-B were developed with new X-shaped bristles, which now also clean the places that normal bristles cannot reach. The green indicator bristles turn yellow over time depending on the individual use and thus indicate the optimal time to change the plug brush - for 100% cleaning power. Guaranteed fit with all rechargeable toothbrushes from oral-B, except for Pulsonic and IO.