A smile is made brighter by healthy and beautiful teeth. A mouthful of healthy and fresh teeth is very important to improve the quality of life. With the improvement of living standards, people no longer only pursue the health of their teeth, but also pay more and more attention to the cleanliness and beauty of their teeth. There are many ways to take care of your teeth, and regular dental cleaning is one of the most important methods that is often overlooked. Moreover, there are many misconceptions about dental cleaning. The results of a survey show that 58.3% of the respondents have never cleaned their teeth, and only 1.9% have cleaned their teeth more than twice. 27.8% of the respondents think that cleaning will cause damage to the enamel on the surface of the teeth, 37.7% of the respondents think that it is abnormal to have hot and cold sensitivity after cleaning; 40.2% of the respondents think that cleaning will make the teeth loose and sparse. Moreover, most of the respondents said that they did not know about some of the above possible phenomena. This shows that people’s awareness of dental cleaning is still relatively low. Many people think, “I just need to brush my teeth properly, I don’t need to clean my teeth. I often hear patients ask, “I already brush my teeth twice a day, why do I still have periodontitis?” In fact, the areas that can be cleaned by our daily brushing are limited, and the gaps and gingival sulci where plaque and soft tartar tend to accumulate are harder to reach with our toothbrush. The plaque and soft tartar that have not been removed for a long time gradually mineralize, and the calcium and inorganic salts in the saliva or gingival sulcus are gradually deposited, and tartar is formed on the surface of the teeth, and it is not easy to remove after it is formed. Plaque and tartar are the main causes of gingivitis and periodontitis, and their amount is directly proportional to the prevalence and severity of periodontal diseases. Scaling is the most effective way to remove plaque and tartar from the tooth surface. Scaling, commonly known as scaling, is the removal of supragingival tartar, plaque and stains with a scaling instrument and polishing of the tooth surface to delay plaque and tartar redeposition. By eliminating the stimulation of plaque and tartar through scaling, gum inflammation can be completely receded or significantly reduced, and periodontal disease can be effectively prevented. In clinical practice, we also encounter many patients who raise such and such doubts and concerns, for example, will scaling damage the enamel on the tooth surface? Will it loosen the teeth and widen the gaps after cleaning? Will scaling easily infect the teeth with hepatitis B and AIDS? Will scaling form a dependency and keep on scaling after one cleaning? And so on. First of all, nowadays, ultrasonic scaling is mostly used in clinical practice, which uses ultrasonic vibration to remove tartar. The enamel on the surface of teeth is the hardest part of the body, and ultrasonic instruments may leave trace scratches on the surface of teeth, which can be eliminated after polishing. Therefore, the damage to tooth enamel caused by ultrasonic scaling is very minute and negligible. Secondly, scaling is not going to loosen the teeth or widen the gaps. Some patients with severe periodontitis may feel that their teeth have become loose after scaling, because their periodontal inflammation is more serious and the teeth have become loose due to the resorption of the alveolar bone, while the presence of a large amount of tartar restricts the movement of the teeth and makes the loosening less obvious. The loosening will appear after the tartar is removed by cleaning. This type of tooth loosening is usually relieved after systematic periodontal treatment and elimination of inflammation, but it cannot be recovered if the loosening is caused by severe alveolar bone resorption. Some patients feel that the gap between their teeth becomes wider after a cleaning for a similar reason. In fact, it is because the gap between teeth is blocked by tartar after a long period of time without cleaning, and after the tartar is removed, the gap feels wider. In regular dental institutions, the treatment instruments are generally taken “one person one use one sterilization”, the patient’s chance of infection on the disease is minimal. Cleaning is not a one-time thing, but it is not a dependency either. In fact, the tartar on the surface of the teeth, once removed, will be slowly re-deposited, and the speed of deposition has a lot to do with whether the individual oral health care measures are appropriate. If you brush your teeth inconsiderately, only brush the outer side of your teeth cleanly, and brush the back of your teeth and the lingual side of your teeth sloppily, tartar will soon appear again in these places. Some people are addicted to smoking and tea, and the surface of the teeth will be black again soon after cleaning. Therefore, we recommend that you not only try to brush every surface of your teeth, but also floss the gaps between your teeth. In a healthy population, it is generally recommended to clean your teeth once every six months to once a year. So, what is there to note about dental cleaning? There is usually a slight soreness and tenderness and a small amount of gum bleeding during the cleaning process, which usually does not cause pain. Sensitive discomfort from hot and cold stimulation can occur within a week after a cleaning, so hot and cold stimulation should be avoided as much as possible after a cleaning. People with certain diseases, such as blood disorders, heart disease, mental disorders, infectious diseases and acute inflammation, should be cautious about dental cleaning. Patients with pacemakers are prohibited from undergoing ultrasonic dental cleaning. In addition, it is advisable for women to go to the hospital for a dental cleaning to remove tartar before preparing for pregnancy. Because of the change in hormone level in the body after pregnancy, the gums are more sensitive to the stimulation of tartar, and pregnancy gingivitis can easily occur, causing bleeding and swelling of the gums.