The Oral-B PRO-Health All-in-one with CrossAction Bristles Toothbrush significantly reduces gingivitis after just 4 weeks of use while remaining gentle on enamel and gingival. Precise, 16?-angle CrissCross bristles penetrate 31% deeper within proximal areas vs. a flat-trim brush to remove up to 99% of plaque biofilm in hard-to-reach areas. Multisection Power Tip bristles clean hard-to-reach areas. Outer extra-soft gingival stimulators massage gums. Textured tongue cleaner removes odor-causing bacteria from the tongue.