Oral-B CrossAction Pro Health toothbrush crisscross bristles remove up to 99% of plaque in hard-to-reach areas. Tight spaces are the easiest places for plaque to build up--and the toughest to clean, since straight-bristle toothbrushes struggle to reach them. But CrossAction Pro-Health CrissCross bristles attack plaque from the perfect angle an optimal 16. Cleaning better than straight ones. Plus, Pro-Health's tongue cleaner helps remove germs from the tongue. Removes up to 99% of plaque in hard-to-reach areas. Helps improve gum health in four weeks by reducing gingivitis. Provides up to 55% better cleaning along the gum line. Removes surface stains and polishes teeth. Removes odor-causing germs from the tongue. Stimulates gums. Works gently on enamel and gums.