Figure 1

The navigation process.
(A) A preoperative photograph of patient. (B) Patients’ preoperative 3D craniomaxillofacial CT image. (C) Preoperative planning and surgery simulation during navigation system. (D) Registration between the patient and the 3D virtual craniomaxillofacial model. (E,F) Surgeons performed the surgery according to the preoperative plan based on the guidance of the navigation system. (G) A postoperative photograph of the patient.