The Oral-B Precision Clean Brush provides deep and thorough cleaning and provides a clean mouthfeel and healthy gums. Advanced bristle system effectively removes plaque. Cleans efficiently between the teeth and under the gum line.Advanced bristle system, removes more plaque than a conventional manual toothbrush. Interdental tips, even penetrate into hard-to-reach places. Indicator bristles indicate when the brush head needs to be replaced by fading.