Fig. 6

3D models used for orthognathic surgery, fabricated with a desktop 3D printer and surgical simulation. Since the FOV is from the orbital floor to the lower edge of the mandible, the slice thickness is greater. Therefore, the reproducibility of the morphology of the teeth is poor, but the accuracy is sufficiently high for osteotomy simulation. a 3D model with maxillary retrusion and mandibular protrusion. b Surgical simulation of Le Fort I osteotomy and SSRO (arrow). c By performing 3D model surgery, the amount of trimming of the anterior mandibular ramus can be predicted (arrowheads). d The arrowhead shows the amount of maxilla movement. The arrow shows bone interference. e In genioplasty, checking the width and height of bones and the position of mental foramen with a 3D model is very useful for predicting risk