The operation covering the ground only needs local anesthesia, and the operation is performed through oral incision, leaving no scars on the appearance. The operation of ground covering day is mainly to directly adjust the relationship between teeth and jaws through minimally invasive alveolar bone (cancellous bone, good blood supply, fast healing and no joint trace after healing). Compared with traditional orthodontics, osteotomy can adjust the relationship between teeth and jaw, with less risk and better effect.

1. For malocclusion caused by mandibular protrusion, the operation is mainly aimed at mandible. After special alveolar bone cutting, some alveolar bones recede and mandibular protrusion is corrected, thus correcting malocclusion. By cutting the alveolar bone backward, not only the length of the mandible is shortened, but also the maxilla rotates upward while retreating, so that the angle of the mandibular angle becomes smaller and the side view becomes more beautiful. If the chin is too long, the jaw osteotomy should be shortened at the same time.

2. For the malocclusion caused by maxillary retraction, it is necessary to move the maxillary alveolar bone forward by osteotomy, that is, to correct the malocclusion by special osteotomy. At the same time, after the maxillary alveolar bone moved forward, the midface depression was also improved obviously. After malocclusion correction, if the nose of individual patients is low, rhinoplasty can further increase the three-dimensional sense of the face.

3. Patients with malocclusion accompanied by maxillary recession and mandibular protrusion need to undergo maxillary alveolar bone advancement and mandibular alveolar bone recession at the same time, and chin osteotomy is needed if necessary.