The Oral-B Pro Deep Clean toothbrush head features specially designed interdental bristles that reach deep into the gaps between teeth and remove up to 100% more plaque than a manual toothbrush. The original Oral-B brush heads have been developed with new X-shaped bristles that clean areas that regular bristles cannot reach. The green indicator bristles gradually turn yellow depending on individual use, indicating the optimal time to replace the brush head for 100% cleaning power. Guaranteed compatibility with all Oral-B rechargeable toothbrushes, except for Pulsonic and iO.