A new ultrasonic toothbrush is highly sought after. It is said to combine the functions of an electric toothbrush and ultrasound, brushing teeth while removing tartar and plaque through ultrasonic vibrations, and even advertises that it can reduce the frequency of dental cleaning as a result. Ultrasonic toothbrushes are difficult to clean tartar and are not a substitute for scaling. Ultrasonic toothbrushes are no substitute for scaling? Is it true that “ultrasonic toothbrushes” can replace scaling? There are three kinds of oral dirt: one is soft dirt, which can be removed by daily rinsing; another is plaque, which can be removed by brushing; and another is tartar, which must be removed by manual cleaning or scaling. It is unlikely that an ultrasonic toothbrush will replace scaling. The cleaning effect of ultrasonic toothbrush may be better than the general electric toothbrush and ordinary toothbrush, and it is somewhat useful to get rid of plaque. Long-term attention to plaque cleaning can prevent and reduce the formation of tartar. However, the ultrasonic waves from the ultrasonic toothbrush cannot match the ultrasonic waves from the scaling machine in the hospital in terms of frequency and strength, so it cannot replace professional scaling. The tartar that has formed is hard, clinging to the teeth, and cannot be removed by an ultrasonic toothbrush. Teeth are always surrounded by saliva, and you cannot brush your teeth 24 hours a day, so tartar prevention is relative and cannot be absolutely prevented, and ultrasonic toothbrushing cannot absolutely stop tartar formation, so you still need to scaling once a year. Special people should not use electric toothbrushes Since ultrasonic toothbrushes do not have much magical effect, how should toothbrushes be chosen? The most people use the ordinary manual toothbrush, purchase should be screened from three major criteria: First, the toothbrush head is not too large, 2.54 ~ 3.18 cm long, 0.79 ~ 0.95 cm wide is good, children’s toothbrush to be smaller, to ensure that it can be flexible in the oral cavity rotation; Second, the bristles should be polished to prevent the bristles are too sharp and cause damage to the gums; Third, the bristles are soft and hard moderate, bristles too hard The bristles are too hard and can hurt the teeth and gums, too soft and not clean. Some special people should use special toothbrushes. People with orthodontics (braces) should pay particular attention to tooth cleaning, and use a single-bristle toothbrush to brush one tooth at a time; people with non-carious defects and “soft” tooth erosion should use a soft bristle toothbrush to delay tooth damage. There is no big difference between the effect of ordinary manual toothbrushes and electric toothbrushes, except that electric toothbrushes are more efficient and are more suitable for children who need to increase their interest in brushing, white-collar workers who seek convenience and speed, and people with difficulty in hand movement or disabilities. In addition, because electric toothbrushes are stronger, the degree of wear and tear on teeth is greater than ordinary toothbrushes. People with non-carious defects, wear and tear, and acid erosion of teeth are advised not to use electric toothbrushes, including electric toothbrushes with ultrasonic waves.