Mandibular protrusion is divided into odontogenic mandibular protrusion and jawbone mandibular protrusion, i.e. bony mandibular protrusion. If the mandibular protrusion is clear, either odontogenic or bony mandibular protrusion, it is impossible to correct the mandibular protrusion by yourself, you must come to the hospital or go to a dental specialist for correction, and the doctor will measure it through clinical analysis, through oral panoramic film and oral lateral film, take a model for measurement, and treat it through fixed orthodontic treatment. If a child is in the period of tooth replacement, is receding teeth, but the jaw protrusion is particularly strong, to carry out functional orthodontic treatment to correct, must go to the hospital for orthodontic treatment, they can not correct the jaw protrusion. The reason must be analyzed clearly, if the functional jaw protrusion, to seize the early correction, correction in adolescence, do not become bony jaw protrusion, then simply rely on orthodontics will not work, but also through orthognathic that is to break the jaw bone, jaw bone to remove part of the trauma will be relatively large, so to seize the correct timing.