Maxillary protrusion can be corrected by orthodontic treatment and combined orthodontic-orthognathic treatment. 1. Orthodontic treatment: The patient will be measured by the degree of protrusion of the maxillary protrusion, i.e., the degree of depth coverage, and then take a lateral cephalogram for cephalometric measurements. Combined with the clinical examination, the doctor will formulate a treatment plan to restore the upper jaw to its normal protruding state. Through orthodontic methods, appropriate biological forces are applied to the teeth, alveolar bone and jawbone to produce physiologic movement, thus correcting the protrusion of the upper jaw. 2. Combined orthodontic and maxillofacial treatment: When the bony protrusion is more serious, and the simple orthodontic method can not achieve a better therapeutic effect, it is necessary to carry out combined orthodontic and maxillofacial treatment. Patients with maxillary protrusion should actively seek medical treatment and under the guidance of professional doctors.