These Oral-B Cross Action Replacement Heads are designed to deliver a superior clean comparable to a professional polishing tool. The unique brush head cleans each tooth individually, ensuring effective plaque removal and promoting healthier gums. Utilizing advanced bristle technology, these heads reach deep between teeth and along the gumline where plaque typically accumulates. Replace your brush head every three months, or sooner if the indicator bristles have faded, for optimal cleaning performance.