Fig. 3

a CT transect showed that the lesion infiltrated into the left vestibule area, involving the nasal septum and the nasal floor; b Three-dimensional reconstruction of maxillofacial region, bone defect; c and lower extremity vessels by CAD technique after CT angiography; d Computer simulation for repair of maxillofacial region; e The position, length, arc of the fibula and the angle of the osteotomy of the fibula used by computer simulation and repair; f The effect of computer simulation after repair; g Three-dimensional printers’ rapid prototyping model; h The left maxillary tumor resection (resection including the left maxillary sinus wall, inferior wall, anterior wall, the section on the right side of the maxillary sinus and inferior wall, by simultaneous resection of nasal septum and nasal tumor infiltrating the bottom); i The skin flap was designed as the center of the skin before operation, and the skin of the left calf was cut into the perforator to dissect the perforating branch of the peroneal artery; j Vascularized free fibula myocutaneous flap was made by truncated fibula; k Repair effect of vascularized free fibula myocutaneous flap during operation