× orthognathic, Maxillofacial, jaw deformity, perioperative wafers, skeletal abnormalities, orthognathic surgery, articulator, dental casts, model surgery, Frankfort plane, outcome of surgery, prediction plan, face bow, maxilla, mandible, orthognathic surgery planning, inaccuracies, maxillary occlusal plane angle,semi-adjustable articulators, surgical outcome, the natural head position