he round head is specially designed for a tooth?by?tooth clean, & its Criss Cross bristles are set at a 16-degree angle to reach deep between teeth to lift & power away up to 300% more plaque for a superior clean vs. a regular manual toothbrush.
Dentists recommend replacing your brush every 3-4 months. Oral-B brush head refills feature indicator bristles that fade halfway to help remind you when to replace your toothbrush head so you maintain a superior clean vs. a regular manual toothbrush.