The Oral-B Complete Deep Clean Manual Toothbrush features Bacteria Guard Bristles that help keep your brush clean up to three months*. The multi-level Medium bristles provide a deep clean while power tip bristles are extra-long to help clean plaque in hard to reach places. Our outer angled bristles gently massage your gums and help clean along the gumline. Oral-B is the #1 dentist-recommended toothbrush brand worldwide. *Inhibits microbial growth that may affect the bristles. The bristles do not kill the bacteria in the mouth or protect you against disease.