It is a subtle crack that is not easy to find, which is more common in permanent molars, followed by premolars. It can cause a series of pathological changes in teeth, pulp, periapical and periodontal tissues. 【 Etiology 】 The internal causes of cracked teeth are poor development of hard tissues, deep cracks or large glaze plates between glaze columns. Occlusal trauma and excessive tooth defects are the external causes of cracked teeth. 【 Clinical manifestations 】 Cracks can be seen on the occlusal surface, which pass through the marginal ridge of 1-2 and reach the adjacent surface, often overlapping with the development groove. When smeared with tincture of iodine, it can be seen that it penetrates into the crack, which clearly shows that it is a crack. The affected teeth may have symptoms such as pain caused by cold or heat or spontaneous pain, and should be carefully examined to avoid missed diagnosis. 【 Treatment 】 The asymptomatic patients can be filled preventively, and those with symptoms should be treated accordingly, and full crown restoration should be carried out in time. Beware of cracked teeth Dai Tingrong Some people like to bite hard things with their teeth. Look, this guy is biting the lid of the beer bottle again. With a bang, the beer bottle cap fell to the ground, and the teeth were fine, fine. Is that really the case? The answer is no, although the surface of your teeth looks good, maybe "cracked teeth" have found you. If you don't believe me, let's go to the stomatology department. According to dentists, there are quite a few people suffering from cracked teeth. Rabbit tooth is a dental disease that is difficult to diagnose. When the fineness of the teeth is below 17.5 micron, it can't be found by naked eyes, and doctors can only make diagnosis through reasoning, so diagnosis and treatment are often delayed. Why is there a cracked tooth? Because this disease mostly occurs in middle-aged people over 35 years old, most scholars believe that this may be related to the fact that after people enter middle age, the content of organic matter in teeth gradually decreases with age, and the content of inorganic matter gradually increases, which makes teeth brittle. The enamel and dentin of teeth are hard and brittle tissues. If you chew something too hard, it may cause tiny cracks in your teeth. In particular, some teeth with dead pulp and nerve loss, and some teeth with steep tips and deep gaps are more likely to cause brittle fracture. This kind of crack is so small that patients often start to notice it. With the gradual deepening of cracks, patients began to have slight pain or discomfort when chewing, and it became more and more serious. Some patients often have to chew with their other teeth. However, often cracked teeth may appear symmetrically on both sides of the teeth, or multiple teeth appear in the whole mouth, thus bringing pain to patients. Early diagnosis of cracked teeth is very important. The earlier the diagnosis is made, the greater the possibility of preserving teeth after proper treatment. Although the cracks in the early cracked teeth are extremely fine, doctors can still show them by irradiating a magnifying glass and dyeing. You can also let the patient bite a wooden wedge, toothpick, cotton ball, etc. , and then tap the teeth from the side, or check the cracked teeth through hot and cold stimulation. For cracked teeth, early doctors can grind the sharp cusp, lower the occlusal surface, and immediately make a full crown to wrap the teeth so that the teeth will not crack again. You can also grind off the gap and then repair the teeth with resin filling material or alloy material. If pulpitis has occurred, root canal treatment is needed, and then full crown trimming is needed. When the crack has involved the subgingival area, and the apical tissue or root has split, the affected tooth often has to be pulled out. (Excerpted from Beijing Science and Technology News) Early prevention and treatment of cracked teeth In daily life, some people feel toothache when they encounter sweet and sour food, so that they dare not bite. After a while, the pain will slowly disappear. Therefore, people do not pay attention to this kind of dental disease, and often delay going to the hospital because of busy work books or other reasons. After repeating this for a while, the toothache became more and more serious and lasted longer and longer, until one day, when I was eating something hard, my tooth suddenly cracked and I came to the hospital for treatment. The doctor will regret to tell the patient that this is a cracked tooth, which came too late to be repaired and had to be pulled out. In fact, this kind of tooth can be completely cured in the early stage. Cracked teeth, medically known as "cracked teeth", are tiny non-physiological cracks on the surface of teeth, which are usually not easy to be found by patients, but can cause some symptoms of toothache. In medicine, the causes can be divided into three categories. The weak part of the tooth structure itself will suddenly crack when chewing hard objects. The higher the cusp, the easier it is to crack. It is also easy to appear when there is a high and steep slope after tooth wear. Patients often feel toothache because of cracks in their teeth. However, the degree of pain caused by cracks at different depths is different. Generally speaking, shallow fissure will not cause toothache. When deep sewing and chewing food, it will cause severe pain when stimulated by hot and cold acid. If it's already deep, even breathing hurts. If you are not careful, your teeth will break because you bite hard things. When our teeth have no cavities and all feel pain, it is necessary to doubt the existence of cracked teeth. At this time, you can do some simple self-examination, such as applying iodine to suspicious parts, wiping with alcohol, and observing the cracks in dyeing, so that you can make a preliminary diagnosis. Or clench your teeth with suspicious teeth and have a short tearing pain, indicating that the teeth have cracked. When the above symptoms appear, you should go to the hospital in time, and ask a professional dentist to check the diagnosis and make corresponding treatment.