Everyone hopes to have a mouthful of beautiful and neat teeth, beauty women want to achieve more “open lips a smile a hundred charming life”. If you lose, may be everywhere “difficult to open teeth”, do not dare to smile or laugh; some people due to deformity and chewing poor, and further affect the gastrointestinal function; some due to deformity to pronounce the speech is unclear, resulting in the obstacles to the choice of employment, and some due to facial deformity, ashamed to see people… …Human beings are evolving, but the human jawbone is underdeveloped due to too much fine food, resulting in many oral and maxillofacial problems. The clinical manifestations of malocclusion are diverse, not only in the misalignment of teeth and abnormal occlusal relationship between the upper and lower jaws, but also in the size, position and morphology of the dental arches and jaws, and even the abnormalities of craniofacial structures. There are many causes of malocclusion: osteogenic malocclusion, any malocclusion formed because of skeletal abnormality belongs to osteogenic malocclusion. For example, the depression of the middle third of the face caused by severe restriction of maxillary development, mandibular retraction or small jaw caused by mandibular dysplasia, and bony open jaw deformity. In odontogenic malocclusion, the malocclusion is limited to abnormalities of the teeth and their supporting tissues. For example, misalignment of teeth, abnormalities in the number, shape, size, structure, arrangement, and occlusion of teeth. Myogenic malocclusion, malocclusion caused by abnormal function of maxillofacial muscles. Such as thumb sucking, lip biting, tongue spitting habits, abnormal swallowing habits, abnormal lip posture position, abnormal jaw movement. These malocclusions should be corrected at an early stage for preventive and interruptive treatment. Prevent the deformity from developing in a serious direction. Compound type of malocclusion is a kind of complex malocclusion that exists and interacts with the above mentioned skeletal, dental and muscular factors. Such as spitting tongue, swallowing bad habits, initially caused by myogenic, long-term effect caused by dental open jaw deformity, if not treated in time, the development of the development of the bone and jaw open jaw deformity. More and more of these malocclusions are becoming a challenge for dentists, and orthodontics has become the solution to the problem. The best time for orthodontic treatment is the peak of youth development, when orthodontic treatment can accelerate tooth movement and tissue reconstruction. Studies have concluded that Chinese girls are 9~10 years old on average and boys are 12~13 years old when they enter the peak period of youthful growth. Adult orthodontic treatment that is not carried out during the growth spurt of youth will have a longer treatment course and the difficulty will increase accordingly. However, some reports show that adult orthodontic patients in Europe and the United States account for nearly 50% of the number of orthodontic patients. In China, with the development of orthodontic technology and the improvement of people’s material living standard, more and more adults, especially those who love beauty, are attracted to join the ranks of orthodontic treatment in order to solve the dental problems that have puzzled him/her for many years, as well as other problems caused by teeth. After the treatment of malocclusion, the morphology, structure and function between teeth and jaws are re-coordinated to achieve a new balance. As long as the morphology and function of the teeth and jaws are balanced and stabilized, the deformed face can be changed, and the patient’s confidence will be enhanced, and his/her smile will open naturally.