Whether deep overjet mouth convexity is recommended to straighten the teeth, need to go to the hospital according to the X-ray and oral examination to judge, jaw deformity can be divided into dental and bony, for bony serious need orthognathic surgery. 1. Dental malocclusion. For dental malocclusion that leads to deep overjet, it is recommended to straighten the teeth, that is to say, to do orthodontic treatment, using the arch wire of the orthodontic appliance to retract the front teeth to correct the protrusion of the mouth, and to elevate the height of the posterior teeth area to improve the curve of the mandibular sphincter to correct the deep overjet. 2. Bony malocclusion. Bony malocclusion caused by deep overjet is often due to overdevelopment of the upper and lower jaws, the jaw branch is too long, the angle of the mandibular plane is small, through orthodontic treatment is difficult, generally need to carry out orthognathic surgery to trim the jaw, with orthodontic treatment to make the overjet cover the relationship between the normal. It is recommended to go to the hospital for a comprehensive examination to determine the correction plan according to your situation.