Nano-toothbrush is a kind of toothbrush made using nanotechnology. Its bristles are very small, can reach the size of the nanometer level, and are softer and more detailed than the bristles of traditional toothbrushes. Nano-toothbrush through the application of nanotechnology, can better clean the tooth surface and between the teeth, can more effectively remove dental plaque and food debris. In addition, the nano toothbrush can also reduce scratches on the tooth surface and gum irritation, giving users a more comfortable brushing experience. The bristles of nanobrushes are usually made of nanoscale bristles, with smaller spacing between the bristles, which can better clean the tooth surface and between the teeth. At the same time, the bristles of the nano-toothbrush are also softer, and will not cause too much pressure and irritation to the teeth and gums. Nano-toothbrushes also usually have more user-friendly designs, such as the non-slip design of the brush hand…