Many people as long as they eat too cold or too hot diet, teeth will suddenly pain unbearable; there are people teeth are not only afraid of hot and cold, but also afraid of sweet and sour, eat an orange on the “inverted teeth” phenomenon; in addition, some people will feel a burst of pain when brushing …… If you have these dental problems, it is important to note that you may be suffering from dentin sensitivity. If you have these dental problems, it is important to note that you may have suffered from dentin sensitivity. At present, the incidence of dentin sensitivity in China is very high. Last year by the Chinese Dental Association Prevention Committee led by the completion of nearly 8,000 samples of the survey shows that the prevalence of dentin sensitivity in China is as high as 30%. Some doctors jokingly say: “There must be one person in three who has sensitive teeth. Dentin sensitivity, commonly known as tooth sensitivity, is regarded as the “cold of oral diseases” by the dental profession. The average incidence of 29%, of which more women than men. Experts explained that, at some point, acid erosion, wear, abrasion and other factors depletion of tooth enamel and bone, or gum recession will lead to dentin tubules directly exposed to the oral environment. At this time, the oral environment of acid, sweet, cold, hot and other chemical or physical stimuli, especially brushing or biting hard objects produced by mechanical stimulation, will make the dentin tubules in the nerve fiber excitation, resulting in varying degrees of short and sharp pain. It has been found that non-sensitive teeth are unresponsive to any stimulus and have very few exposed dentin tubules, while sensitive teeth have a higher number of open dentin tubules per unit area, almost eight times as many as the former. Similarly, the diameter of dentin tubules in sensitive teeth is almost twice as large as in non-sensitive teeth. This shows that dentin sensitivity is closely linked to dentin tubules. The opening of the dentin tubules directly in the oral environment and at the ends of the pulp cavity is the key to dentin sensitivity. However, for this common oral disease with such a high prevalence, not only the general public, but also individual dentists lack of proper understanding, and lack of active screening and timely guidance to patients in diagnosis, which leads to omission or misdiagnosis. According to the analysis, in addition to improper dietary habits, factors that trigger dentin sensitivity also include dentin exposure, for example: because of untimely scaling of teeth leading to severe calculus, or even periodontal disease, over time, gum recession occurs, triggering dentin exposure. In addition, improper brushing methods and excessive force can also cause dentin exposure. There are also patients with gastroesophageal reflux (GERD), whose mouths are in an acidic environment for a long time, and they may suffer from the disease as a result. If dentin sensitivity has occurred, it is recommended to drink sweet and sour beverages with a straw to reduce the contact between the beverage and the teeth, rinse your mouth with water in a timely manner after eating, insist on receiving an oral examination every six months, and take ‘love teeth’ and ‘protect teeth’ as a Healthy new fashion. “Eight ways to prevent dental allergies There are actually many ways to prevent and control dentin sensitivity. The doctor introduced eight methods: 1, develop the habit of rinsing after meals; 2, reduce the intake of acidic foods and drinks to avoid acid erosion; 3, after eating acidic foods and drinks, it is best to wait one hour before brushing; 4, choose qualified toothbrushes and the use of the correct method of brushing, it is best to use a gum toothbrush, reduce the damage of toothbrushes on the gums, and at the same time, pay attention to avoid brushing with excessive force; 5, periodontal disease, night teeth grinding, excessive tooth wear, etc., to prevent dentin sensitivity. Teeth grinding, teeth excessive wear and other dental diseases should be treated in a timely manner; 6, gastroesophageal reflux and other endogenous sources of acid patients to treat the disease; 7, the teeth in hot and cold discomfort or pain (dentin sensitivity), should be timely to find an oral surgeon; 8, every day in addition to careful brushing, but also should be used in anti-sensitive type of toothpaste. Toothpaste mainly play a role in cleaning and care, but now there are also prevention, health care, treatment effects of toothpaste, such as fluoride toothpaste to prevent dental caries; anti-sensitive toothpaste can alleviate the symptoms of tooth sensitivity.