Brushing is the basic method to control plaque. The purpose of brushing is to remove plaque, soft scale and food debris from the tooth surface and interdental space, reduce oral bacteria and other harmful substances, and prevent the formation of tartar. However, if the brushing method is inappropriate, it will not only fail to achieve the purpose of brushing, but also cause various adverse consequences. The most common soft tissue damage caused by inappropriate methods is the atrophy of gingival tissue, and the hard tissue damage caused by abrasion and cervical wedge defects (as shown by arrows in Figure 3), and the resulting sensitivity of the cervical region of the teeth. Figure 3: Wedge defect Therefore, the following three aspects should be noted in the process of brushing: ① choice of toothbrush: it is recommended to use a soft-bristled toothbrush; ② choice of toothpaste: be careful to choose toothpaste with rough rubbing agents; ③ choice of brushing method: in addition to taking the appropriate brushing method described above, it is especially important to use gentle force to brush the teeth. It should be known that the teeth are cleaned by gentle force to achieve the circular reciprocal action, through the same action of repetition so that the large pieces of food residue left on the surface of the teeth from large to small, from there to no, to achieve the purpose of cleaning, rather than through brute force to achieve the correct brushing method when brushing teeth can refer to the following chart: vertical brushing method: the specific operation is as follows: 1. Brush the upper teeth, first put the bristles of the toothbrush lightly on the gum and tooth Brush the lower teeth, the same method from the bottom to the top, inside also to brush, so that the food residue and plaque in the crevices of the teeth can be cleaned thoroughly; 3. Note: 1. Brush carefully, inside, outside, front and back teeth should be brushed. Casually cope with a few brushes, so often do not achieve the purpose of cleaning the tooth surface. 2, toothbrush use for a long time, the bristles will be bent and disheveled, weakening the ability to clean teeth. Therefore, it is best to replace a toothbrush every 3 months. 3, each brush time is best to maintain 3 minutes, too long or too short is not appropriate.