Teeth can be scaled, and scaling, also called ultrasonic scaling, is a way to restore dental health. First of all, scaling can remove plaque and calculus and other undesirable irritants from the tooth surface, because if calculus is not removed regularly it will stimulate the gums, causing gingivitis and periodontitis, resulting in red, swollen, painful gums, and even loose and lost teeth. Secondly, scaling can help remove bad breath, because the bacteria in the mouth will increase significantly when there is a large accumulation of plaque, so scaling can remove plaque and help remove bad breath. Scaling should be carried out in regular medical institutions or hospitals, because the aseptic operation of scaling is relatively strict, and the instruments used must all have strict sterilization and disinfection measures, so as to eliminate infectious diseases, and it is recommended that patients have a scaling every six months to a year to prevent oral diseases.