Panasonic Sonic vibration toothbrush EW-DM81-W503, 31,000 oscillations, White Very fine bristles In order to remove bacteria hidden in periodontal pockets, which cause periodontitis, with the help of a toothbrush, the bristle tips must be able to penetrate the narrow pockets. In the original Panasonic super fine toothbrush, the bristle tips, which have a diameter of only approx. 0.02 mm, are designed to penetrate only 3 mm into periodontal pockets. Comparison of how easily the bristles penetrate periodontal pockets. Sonic vibrations The toothbrush vibrates at a rotational speed of approx. 31,000 movements/min., for a smooth and high-speed movement of the toothbrush. The precise high-speed vibrations deeply remove tartar from periodontal pockets, minimizing the strain on the teeth and gums. Two selectable brushing modes Ergonomic, ultra-slim design The body is ultra-slim and lightweight, making it easy to use. Washable