Figure 1. 3D models for surgical simulation of Le Fort I osteotomy and sagittal splitting ramus osteotomy in oral and maxillofacial surgery.

Both models were 3D printed with a laminating pitch of 0.3 mm; the 3D printing time for one 3D model was approximately 18 h. (A) FDM 3D printer "Value3DMagiX MF-800". (B) Fabrication of two 3D models facilitates understanding of pre- and post-operative change. These are useful for providing patients with pre-operative explanations. (C, D) Surgical simulation with 3D models allows a "hands-on" understanding of the amount and direction of bone movement and areas of interference between bone segments.