Scaling is a highly specialized technical work, in the dental hospital, medical personnel using manual instruments scaling, need about three hours, if the use of ultrasonic scaler scaling, also need about one hour. In daily life, many people do not know much about scaling, resulting in scaling is easy to fall into the following misunderstandings: Myth 1: scaling will wash the teeth bad This statement is not scientific. At present, dental scaling usually use ultrasonic scaler, it is through the ultrasonic vibration to smash and vibration down the principle of dental calculus, rather than like a knife to scrape down the calculus, it will not destroy the teeth themselves, so there is no talk of washing the teeth bad. Myth 2: Serious brushing does not need scaling Brushing can keep the mouth clean, but can not completely remove the plaque in the mouth, so even if serious brushing needs regular scaling. Myth 3: scaling will make the gap between the teeth wider, loose teeth This statement is not scientific. Before scaling, the long-term accumulation of calculus will oppress the gums and alveolar bone, making them shrink or “bone resorption”, the gap between the teeth will become wider, and the teeth will even be loose. But because at this time the tartar will be replaced to fill the gap, thick tartar will also be like a splint to the teeth temporarily fixed, so it is difficult for people to feel the teeth loose. After scaling, the calculus disappears, the redness and swelling of the gums subside, and you will feel that the gap between your teeth has become larger, especially if you have more calculus. In fact, washing away the calculus simply frees up teeth that are already loose and damaged, which is one of the truths about feeling wider gaps and loose teeth after a cleaning. If after scaling you feel that the gap between the teeth becomes bigger, it means that there is periodontal disease itself, scaling late, the gums are unhealthy and shrink, and the calculus itself may cause the teeth to loosen, if you take measures as early as possible to take out the calculus and eliminate the inflammation, the teeth will only become more and more healthy. If you do not remove the tartar in time, the gums will shrink further, but will lead to loose teeth. Myth 4: scaling will make the teeth white In fact, this is unscientific, scaling is only to remove the calculus and soft tartar, plaque, etc., revealing the color of the teeth themselves, and will not make the teeth white. Dental diseases, more in the prevention. Dental cleaning becomes more important to ensure oral health. Therefore, it is recommended to develop good oral hygiene habits, regular dental cleaning, to maintain oral hygiene and health. In order to avoid the production of dental calculus, half a year to a year of dental cleaning is appropriate.