Abstract: PURPOSE: To evaluate the clinical value of 3D printing model and three-dimensional preformed titanium mesh in the treatment of complex maxillary fractures. METHODS: From January 2017 to October 2018, six patients with complex maxillary fractures treated in the Department of Oral and Maxillofacial Surgery of Shaoxing Central Hospital were analyzed retrospectively. The skull data were imported into computer-aided design mimics l0.01 software and Geomagic Studio 2013 software through 16 slices of CT scans, to accurately segment fracture sites and reconstruct three-dimensional models. Fracture reduction was simulated in the software. The fracture model of l∶l ratio was printed by 3D printing technique both before and after fracture reduction. According to the entity model, pre-bending of titanium mesh was completed before operation,and the surgical effect was evaluated after operation. RESULTS: All the 6 cases completed the operation successfully and followed up for an average of 12 months. The restoration of facial outline and occlusion relation was satisfactory in 5 cases and relatively satisfactory in 1 case. CONCLUSIONS: For patients with complex maxillary fracture, application of 3D print model and three-dimensional preformed titanium mesh is helpful to shorten the operation time, reduce the incidence of postoperative adverse events, improve the effect of fracture reduction and facial symmetry.

Key words: Complex maxillary fractures, 3D printing technique, Preformed titanium mesh, Skull model