Patients with underdeveloped upper jaw and overdeveloped lower jaw, manifesting as retrognathism, which is known as geodesic, have obvious improvement in posterior shape and occlusion after intraoral surgery. Wang Zhaoling, Department of Stomatology, General Hospital of Jinan Military Region Before and after surgery of maxillary anterior migration and mandibular recession Pre-operative occlusion frontal Pre-operative occlusion lateral Post-operative occlusion frontal Post-operative occlusion lateral