牙支持式数字化导板在水平截骨颏成形术中的应用及精确性分析

目的: 探讨牙支持式数字化导板在水平截骨颏成形术中的应用价值。方法: 选择2017年3月~2018年3月就诊于昆明医科大学附属口腔医院口腔颌面外科的颏部畸形患者7例,通过建立数字化模型,进行三维影像学测量,精确判断颏部在三维空间上的畸形程度,进行手术前模拟设计,虚拟截骨,设计并3D打印成型牙支持式截骨导板应用于手术。术后3个月拍摄CBCT与手术设计进行拟合,评价导板的精确性。结果: 患者均为一期愈合,术后患者对效果均比较满意,拟合数据显示术后CBCT与术前虚拟手术的平均误差为0.7335 mm。结论: 利用数字化技术进行三维重建、手术模拟,3D打印牙支持式导板引导截骨,提高手术精度,可有效改善各种颏部畸形,具有实际应用价值。

Application of Tooth-supported Digital Guide in Genioplasty and Accuracy Analysis.

Objective: To investigate the application value of tooth-supported digital guide plate in genioplasty. Methods: Seven patients with chin deformities at the Department of Oral and Maxillofacial Surgery of Affiliated Stomatological Hospital of Kunming Medical University were selected from March 2017 to March 2018. Three-dimensional imaging measurements were made by establishing a digital model to accurately determine the degree of malformation of the chin in the three-dimensional space. The doctors were given simulated design before surgery, virtual osteotomy, and design and 3D printed tooth supported osteotomy guide plate for surgery. Three months after surgery, CBCT was taken and the surgical design was matched to evaluate the accuracy of the guide plate. Results: The patients were all primary healed and satisfied with the effect after the operation. The matched data showed that the average error between postoperative CBCT and preoperative virtual surgery was 0.7335mm. Conclusion: The use of digital technology for 3D reconstruction and surgical simulation, and 3D printed tooth supported guide could improve operation accuracy and the variety of chin deformities were effectively improved, thus it has practical application value.