目的 探索虚拟技术在牙颌面畸形治疗中的应用。方法 通过颅颌面CT扫描,进行颌面部骨的三维重建,将该模型与激光扫描牙列模型拟合,建立数字化颅颌面-牙列模型。基于此模型进行手术虚拟设计和模拟预测。确定手术方案后,进行牙合板及导板的3D打印。在手术牙合板及导板的指引下进行手术。通过拟合虚拟设计与手术后重建模型来检验手术精确性。结果 通过CT重建图像与激光扫描牙列模型的拟合,获得了颅颌面-牙列模型。利用此模型可进行虚拟手术设计和手术模拟。通过不断调试和修正,可获得最佳个体手术方案。3D打印牙合板及导板可精确指导手术的实施。结论 在牙颌面畸形的治疗中,虚拟手术设计和虚拟导板技术是一个理想的选择,值得临床推广应用。

Objective To explore the application of virtual technology in the treatment of dento-maxillofacial deformities. Methods The digital craniomaxillofacial dentition model was established through combining 3D CT model and laser-scanned dentition model. Based on this digital model, virtual surgery planning and simulation was performed. And the surgical splints and guides were 3D printed after confirming the surgical plan. Then, under the guidance of surgical splints and guides, orthognathic surgery was performed. Surgical accuracy was evaluated by matching the surgical planning and the post-operative reconstruction of craniomaxillofacial dentition model. Results Precise craniomaxillofacial dentition model was achieved through image fusion.Using this digital model,virtual surgery planning and simulation was performed. By means of try and error, the optimal individual plan was confirmed. The operation was accurately performed with the guidance of 3D-printed surgical splints and guides. Conclusion The application of virtual surgery planning and virtual splint is an ideal alternative in the treatment of dento-maxillofacial deformities,and is worthy of application.