DIRECTIONS: Replacement brush heads compatible with most Oral-B(R) power toothbrushes*. For healthy teeth and gums visit your dentist every 6 months and replace your toothbrush every 2 to 3 months.* does not fit Vitality Sonic(R), CrossAction Power (R). Oral-B Sonic Complete (R), Pulsonic (R) and 3D White (R).