Wearing braces mainly lies in the ability to correct a wide variety of malocclusion, to prevent the possible development of malocclusion trends and the causes of dental malocclusion, and to interrupt and treat the malocclusion that has manifested itself. The advantages and disadvantages of wearing braces are as follows: I. Advantages 1, correct the bite relationship: teeth are not aligned, prone to the wrong bite relationship, long-term bite force imbalance, easy to affect the chewing function, resulting in tooth wear, and even premature loosening and loss. Through the braces to correct the bite relationship, so that the teeth to restore the normal bite and normal physiological function; 2, conducive to dental cleaning: when there is crowded teeth or teeth alignment is not neat, easy to cause excessive residue of food residue after eating and drinking, and not easy to clean, long-term, there will be oral odor, tooth decay, calculus, etc., through the braces to correct teeth, so that the teeth to restore the normal alignment, can facilitate dental cleaning; 3. Protect the gums: when the teeth are not aligned to affect oral cleaning, due to food debris or tartar deposits, causing gum bleeding, redness and swelling, or cause other periodontal tissue diseases, such as periodontitis, calculus, dental caries, etc., will also cause gum atrophy, and over time the alveolar bone will also be atrophied. Can wear braces to correct teeth, to avoid such situations; 4, to improve facial beauty: teeth misalignment, such as the ground, crescent-shaped face, double (teeth together) protrusion, etc., affecting facial beauty, by wearing braces can improve the facial incongruity caused by uneven teeth. Second, the disadvantages 1, foreign body feeling: wear braces at the beginning, due to braces in the mouth does not adapt, patients can have a foreign body feeling, causing chewing or speaking inconvenience; 2, pain: due to braces have fixed and orthopedic effect, wearing braces will appear tooth pain feeling. In addition, the initial braces or braces are not suitable, wire brackets or nails and oral mucosa, tongue friction, and even bleeding, when patients often appear pain; 3, diet affected: during the wearing braces, doctors generally recommend avoiding hard food, if the diet is not appropriate, there may be braces damaged or fall off; 4, affect the aesthetic: before the end of orthodontics, long-term wearing wire brackets braces, will affect the 5.Other: In the process of wearing braces, the doctor will make certain wear and tear on the tooth surface, which will lead to enamel demineralization and may cause tooth decay. If the treatment is not proper, it may cause root resorption. In addition, if the patient suffers from periodontitis and other diseases, it may also lead to loosening and loss of teeth.