Li Li, Sun Jian, Li Ya-Li, Chen Li-Qiang, Meng Kun, Sun Ming, Zhang Xiu-Xiu
Department of Oral and Maxillofacial Surgery, Qingdao University Affiliated Hospital. Qingdao 266000, China. E-mail:
Shanghai Kou Qiang Yi Xue. 2021 Apr;30(2):219-224.
To use three-dimensional reconstruction measurement, preoperative diagnosis, surgical design, surgical simulation, guide plate production, navigation verification and effect evaluation of orthognathic surgery assisted by digital technology, in order to explore more scientific and reasonable programs and procedures of orthognathic surgery.
Twenty-five patients with congenital dental and maxillofacial deformity were selected as the experimental subjects, craniofacial spiral CT was conducted before surgery and CT data were imported into Mimics 20.0 software to establish a 3D head digital model. The bone landmarks in three-dimensional reconstruction digital model were selected, measured, analyzed and diagnosed, and the design of the surgical plan and the production of the guide plates were performed. Surgical navigation system was used to confirm the maxillary position, verify the bone retention and guide precise bone grinding during operation. Craniofacial spiral CT was conducted 1 week after surgery for postoperative validation of the surgical design protocol. Statistical analysis was performed using SPSS 24.0 software package.
All 25 patients were operated according to the digital orthognathic surgery design and procedure.There were no significant differences in X, Y and Z three-dimensional directions in 10 actual landmarks between the postoperative actual head model and the preoperative predictive head model（P>0.05）.
Orthognathic surgery assisted by digital technology has the advantages of precision and minimal invasiveness.
利用数字化技术辅助正颌外科手术的三维重建测量、术前诊断、手术设计、手术模拟、导板制作、导航验证及效果评估，探索更科学合理的正颌外科手术方案及流程。
选取25例先天性牙颌面畸形患者作为实验对象，术前进行颅颌面螺旋CT扫描，将CT数据导入Mimics 20.0软件建立三维头部数字模型。对三维重建数字模型中的骨标志点进行选取、测量、分析及诊断，并进行手术方案设计及导板制作。术中使用手术导航系统确定上颌位置，验证骨保留情况并引导精确磨骨。术后1周进行颅颌面螺旋CT扫描以验证手术设计方案。使用SPSS 24.0软件包进行统计分析。
25例患者均按照数字化正颌外科手术设计及流程完成手术。术后实际头部模型与术前预测头部模型在10个实际标志点的X、Y、Z三维方向上差异均无统计学意义（P>0.05）。
数字化技术辅助正颌外科手术具有精准、微创的优点。
