Triangular shaped bristles remove up to 25% more plaque.* Germ-resistant bristles keep brush clean between uses.** #1 recommended by dental professionals. 8 refills. *Compared to conventional nylon filament. Data on file. **Bristles incorporate an antibacterial agent for continuous bristle protection. Bacterial growth that may affect the bristles is inhibited. The agent in the bristles does not protect against disease.