Patients with anterior open (malocclusion) show that the front teeth cannot bite, which belongs to a kind of malocclusion that is difficult to be corrected, has poor treatment effect, and is easy to recur, and its etiology includes bad tongue habit, abnormal eruption of anterior teeth, and jawbone deformity, etc. The treatment means include early correction, comprehensive orthodontic treatment, and combined orthodontic-mandibular treatment. The treatment means include early orthodontic treatment, comprehensive orthodontic treatment, orthodontic – orthognathic joint treatment: for patients in the period of replacement of milk teeth, generally accompanied by bad tongue habits, can be corrected for bad tongue habits, such as wearing orthodontic appliances to correct bad habits, can reduce or even complete the treatment of the anterior open (malocclusion); for patients in the period of permanent teeth, the simple dental anterior open (malocclusion) or mild bony malocclusion, can be corrected by the full mouth orthodontic treatment; severe jaw anomalies, an anterior teeth eruption abnormalities and jaw deformities. For permanent patients, simple dental ankylosis or mild bony malocclusion can be corrected by full mouth orthodontic treatment; severe jawbone abnormality resulting in ankylosis can be corrected by orthognathic surgery.