Tooth decay cannot be removed by toothbrush, because toothbrush mainly plays a preventive role, it can remove food debris and plaque in our mouth, which can prevent the occurrence of tooth decay. However, once tooth decay occurs, it is recommended to go to professional dentistry for treatment immediately, which is the best treatment method for tooth decay. At this time, it is not correct to apply the method of brushing teeth, just as the screen of the cell phone has been broken, and applying the protective film of the screen is not able to repair the broken screen. Therefore, from this point of view, when tooth decay occurs, patients need to go to professional dentistry immediately, let the dentist check the specific scope and depth of tooth decay, then apply the power system of dentistry, that is, high-speed turbo drill, to remove the decayed part of tooth decay and apply the special filling material to fill the cavity, this is the correct method to treat tooth decay. Brushing, in essence, is the prevention of tooth decay and oral disease, but it has no curative effect.