关键词: 数字化, 3D打印, 内镜, 颧骨, 颧弓, 骨折, 复位

Abstract: PURPOSE: To explore the application and effect of digital and 3D printing combined with endoscopic-assisted technology in the treatment of zygomatic bone-zygomatic arch fractures. METHODS: Twelve patients with unilateral zygomatic fractures who underwent surgical treatment in First Affiliated Hospital of Bengbu Medical College from December 2020 to September 2021 were included in this study. All patients underwent 3-D CT reconstruction of the whole head before operation, by simulating reduction of the fracture site using the principle of mirror reverse, printing the fracture model after reduction, and performing titanium pre-bending on the model. Intraoperatively, the fracture was dissected and repositioned using an endoscopically assisted vestibular sulcus incision combined with an anterior auricular incision. All patients underwent 3-D CT reconstruction of the whole head again after operation. The three-dimensional model data reconstructed after operation and the 3-D model data before preoperative simulated reduction were analyzed by spectral fusion chromatic aberration to evaluate the postoperative effect. RESULTS: The operation in 12 patients went smoothly. The facial appearance and function recovered well after operation. There was no obvious complication and the facial skin scars were inconspicuous. Compared with postoperative CT and preoperative simulated design spectral fusion chromatic aberration analysis; the maximum upper deviation was 2.998 7 mm, the maximum lower deviation was -2.998 6 mm, the average upper deviation was (0.243 0±0.025 0) mm, the average lower deviation was (-0.310 0±0.180 0) mm. CONCLUSIONS: Digital and 3D printing combined with endoscopic-assisted techniques help improve the accuracy of fracture reduction, reduce intraoperative tissue damage, postoperative complications, and provide good aesthetics with hidden postoperative scars when performing anatomical repositioning of the fracture site under direct vision.

Key words: Digitization, 3D printing, Endoscopic, Zygomatic bone, Zygomatic arch, Fracture, Reduction