关键词: 3D打印, 导板技术, 脊柱肿瘤, CT血管造影, 精准化手术, 多学科诊疗

Abstract: Objective To explore the application of 3D printing technology in multi-disciplinary treatment（MDT） medical model in spinal tumor precision and individualized surgery. Methods 36 caseswith spinal tumors who received MDT in the AffiliatedHospital of Guizhou Medical University were retrospectively analyzed from June 2016 to December 2018. They were divided into testgroup （n = 18） and control group （n = 18）according to using 3D wPrinting guide pedicle screw placement or not.In the test group, a full-scale model of tumor regional spine and an individualized pedicle guide plate were manufactured by 3D printing technique modeling before operation. The surgical method was designed by 3D printing model, the operation was simulated and screw placement. During the operation, the precise tumor resection and accurate screw placement were finished.The operation time, bleeding amount, fluoroscopy times and the accuracy rate of the screw placement were comparedin two groups. The curative effect was evaluated by VAS score during perioperative period. Results 18 cases in the test group were treated with 3D printing technique before operation. The accuracy, complete resection, accurate screw placement, intraoperative bleeding, fluoroscopy times and operation time in the test group were significantly lower than those in the control group. The symptoms of all patients were improved obviously after operation, and the VAS scores of follow-up at 6 months and 12 months after operation were obviously improved compared with those before operation. Conclusion s3D printing technique combined with MDT can be used to assist in the treatment of complex spinal tumor operation, enhance the safety and accuracy of tumor resection ,complete the resection of tumor in a shorter time, reduce the amount of intraoperative bleeding, improve the accuracy of pedicle screw placement.

Key words: 3D printing, guide plate technology, spinal tumor, CT angiography, precision surgery, muti-disciplinary treatment