Can you imagine a small problem dragging an otherwise healthy person to no spirit? Such is the case with Old Wang, who is 52 years old this year. Old Wang’s family is in Hulunbeier, Inner Mongolia, and he is a sturdy Inner Mongolian man. Two years ago, his lower lip appeared repeatedly swollen and ulcerated, continued without obvious intervals, when a doctor prescribed Yunnan Baiyao, also said lack of vitamins, two years to see all sizes of hospitals in Inner Mongolia, a variety of ways have tried, ultimately useless. ”I can not eat, people are thin, and often worse mood when the lip ulcer heavy”. Not long ago, I heard people say that the provincial stomatological hospital in Hangzhou, Zhejiang Province, there is an oral mucosa department, the treatment effect is good, so his daughter took him to the Zhejiang University School of Medicine Stomatological Hospital, looking for the director of He Hong to see the doctor. In addition to looking at the affected area of the lips, Director He had a number in mind once he saw the patient’s lower front teeth with patches of calculus. In addition to administering simple medication and treatment as well as a mild immune regimen, Director He had the young doctor make arrangements for the patient who came from afar as soon as possible, and the patient was willing to accept and comply, so he had his teeth cleaned on the same day. Old Wang had no history of systemic or other diseases. Director He believed that the causal relationship between the etiology and the lesion of this patient was typical, and the result of the lesion caused by oral hygiene was more serious. Especially at the two-week follow-up, the fact that the condition had improved significantly, the before and after signs were very different, and the condition was basically healed quickly, gave the doctor and the student a feeling of “Sure enough…”. The bacteria that enter the mouth must first settle in the mouth in order to become one of the oral oral flora. Once the acquired film is formed on the surface of the teeth, bacteria attach to it and deposit in layers within only a few minutes. This bacterial deposit, called plaque, is very sticky and it provides the essential mineralized core for the formation of tartar. If the plaque remains on the tooth surface for a long time, together with the deposition of food residue and soft tartar, and gradually there is shedding of necrotic tissue cells, white blood cells, mucin in saliva, protein, etc. attached to it, forming yellow or off-white tartar and soft tartar. Even inflammatory blood staining of gums or smoked tea to blackish brown. The inorganic salts required for tartar formation are mainly from saliva. Saliva contains calcium and phosphorus and other mineral salts are supersaturated, when saliva out of the mouth of the duct, into the mouth, the carbon dioxide tension contained in half. Carbon monoxide escapes saliva PH value increases, calcium and phosphorus ions that is precipitated from the supersaturated state, deposited around the core. At the same time as the mineral salts are deposited, the bacteria residing in the core also gradually mineralize, and over time, hardened tartar is formed. Tartar is not only found on the surface of the teeth above the gum margin, but sometimes also on the neck of the teeth or on the roots of the teeth. The tartar presses mechanically against the gums, causing impaired blood circulation and reduced resistance to the gums, and because tartar is the best place for plaque to stay, the tartar itself tends to attract more bacterial toxins. These bacteria and their toxins and the local long-term stimulation of tartar form the main pathogenic factors. Therefore, clinically, it not only causes dental caries and aggravates periodontal disease, but also brings about lichen planus and labyrinthitis. Dr. He Hong briefly talked about the pathogenesis of this patient, mentioned that the oral hygiene promotion was repeatedly emphasized to the patient and family members successively, and expressed once again that in fact, the cure is to find the cause, and the treatment is actually to find the cause. Over the years, there is in-depth research on various pathogenic bacteria and mucosal diseases and precancerous lesions, as well as the manifestation of systemic diseases in the oral cavity also has a deep concern about this 2013 won one of the few first-class awards in Zhejiang Province, one of the major experts in medicine and health science and technology achievements, the daily clinical teaching is always tips. She repeatedly emphasizes that cleaning teeth and gums is important and basic. Dr. He Hong recommends that you brush your teeth more than 2-3 times a day, more than 3 minutes each time, brush your upper teeth downward, brush your lower teeth upward, brush your upper and lower left and right teeth in sections, brush 50-100 times on each side of each section, brush the bristles of each stroke, try to brush into the gaps and gum grooves, brush with the tip of your tongue, sweep the upper and lower left and right teeth in all directions and corners, and continue to brush again if there are parts that need to be brushed. Add dental floss or a toothbrush as appropriate. Of course, if you have dental or periodontal disease, you should treat it promptly.