Orthognatic surgery resolves anomalies in the position, size, or form of one or various facial bones responsible for the incorrect alignment of the teeth and structural facial disharmony. These facial deformities are possible to correct through orthodontic and surgical treatment. A preliminary, pre-surgical phase is fundamental to correctly place teeth in the bone base so that after surgery the teeth are correctly articulated and the bones are in harmony with the rest of the face. Treatment is followed up by post-surgical orthodontics. These procedures require the joint effort of both the maxillofacial surgeon and orthodontist to simultaneously achieve bite function and facial esthetics.