What is dental fear? Dental fear refers to a group of abnormal psychological, physiological and behavioral states related to dental treatment. Manifested in the patient before treatment, during the treatment of tension, anxiety, fear, can not control their own emotions and behavior, clinical manifestations of rapid heartbeat, blood pressure abnormalities, sweating, talkative, muscle tension, pallor and even fainting. Patients will also appear to avoid medical behavior, do not want to accept dental diagnosis and examination, do not want to cooperate with the doctor’s diagnosis and treatment work and so on. What are the reasons for dental fear? According to foreign epidemiological surveys, the cause of the disease is mainly divided into three categories: most of the dental fear of the patient’s fear mainly from the past (childhood) unpleasant dental experience, such as a painful tooth extraction surgery, a full of pain in the dental nerve treatment, a treatment of accidental choking, or pharyngeal sensitivity triggered by nausea and so on. There are also a few hearsay accounts, such as from parents, relatives, friends or colleagues, of unpleasant dental experiences, especially if these accounts are exaggerated. The “power” of the media is also not to be ignored – negative or ironic publicity about dentists and dental treatment in movies, TV shows, cartoons, comics, jokes, etc. often subconsciously associates dentistry with pain, suffering and horror. A small number of patients have a fear of dentistry itself, such as a sensitive pharynx, inability to hold water in the mouth, an aversion to odors, and an inability to adapt to the dental environment, which is somewhat similar to fear of heights and fear of flying. There are not many patients belonging to this category, but due to the specificity of their fear, it is also more difficult to treat. What are the main reasons for dental fear in China? It should be said that the domestic dental fear from the point of view of the etiology, and foreign countries are basically the same, but there are some differences: the domestic dental fear patients often have unpleasant dental experience, and often with the “kill the nerve” treatment and “wisdom teeth” surgery related to the pain and knocking Pain and vibration are the main reasons. Domestic due to limited treatment conditions, more patients and doctors conceptual problems, often ignoring the protection of the patient’s psychological and caring, some doctors only focus on treatment, ignoring the communication with patients, ignoring the principle of pain, the pain attributed to the patient timid, poor tolerance, resulting in the treatment of rough, the patient is left with psychological trauma, and become a patient with dental phobia of medical origin. What is the harm of dental fear: dental fear of harm has many characteristics: 1, from the patient’s side, the patient for dental fear, poor cooperation, is bound to affect the doctor’s mood and state, affecting the effect of clinical treatment, dental disease is not effectively treated or interrupted halfway, further jeopardize the patient’s oral health. The patient because of fear, taste the emergence of avoidance of medical behavior, unwilling to visit the clinic or regular checkups, dental disease delayed again and again, to be forced to treat the time, often there is no effective treatment. 2, from the doctor’s point of view, the patient in the treatment of negative behavior and poor degree of cooperation directly interfere with the smooth implementation of the doctor’s treatment, affecting the therapeutic effect, often leading to the loss of mutual trust between the doctor and patient, the relationship deteriorated. 3, from the social point of view, the fear of the patient’s bad experience, often be expanded or relayed, leading to more dental fear, so that the implementation of oral health care, the image of the dentist is damaged. Dental fear of those treatments: dental fear of treatment is the task of society as a whole, including the strengthening of oral health education, change the traditional concepts, improve the conditions of diagnosis and treatment and so on. In this regard, the western developed countries after many years of accumulation, has formed a more complete set of diagnosis and treatment and theory system. At present, our country in this regard is still the initial stage. From a medical point of view, the main methods of treatment of dental fear are mainly three aspects: 1, psychological behavioral therapy: mainly including communication to establish trust, explaining the demonstration of the diagnostic and treatment process, treatment content from simple to complex step-by-step in-depth desensitization method, as well as hypnosis, etc.. 2, dental painless treatment: including a variety of applications in dental treatment instruments, equipment, drugs and so on. 3, drug sedation treatment: including laughing gas, oral sedation drugs, intravenous sedation drugs, etc., sedation technology to treat dental fear effect is very certain. Different sedation techniques have their own advantages and disadvantages and indications, need to be selected according to the patient’s condition and diagnosis and treatment of specific content.