For implants, crowns, bridges and other restorations. Clinically proven more effective than string floss for improving gum health, the new Plaque Seeker Tip is designed to provide the benefits of pulsating water. It has three thin tufts of bristles to access stubborn plaque around implants, crowns, bridges, veneers and other areas that are specially susceptible to plaque accumulation. For use with the Waterpik Ultra Water Flosser WP100 and Cordless Plus Water Flosser WP450. Change every 3 months.