颅颌面虚拟牙种植的全功能定位研究

Reseach of Full-Featured Positioning of Craniofacial Virtual Dental Implant

基于CT图像三维重建系统进行颌骨形态等方面的分析,牙种植的稳定性与美学效果取决于种植体在颌骨内的三维空间位置.提出一种交互式全功能定位方法,主要讨论三维模型的坐标转换和数据坐标的提取技术.结合VTK的提取类库功能与针刺取点算法的特点,通过交互式操作获取三维颌骨图像的坐标,实现牙颌面的种植体定位.将其与种植体智能定位后的坐标相比较,进行微调整,减少了后者在植入方向、植入长度等方面存在的误差,有效地为虚拟牙种植导航系统提高了精确度与安全性.

Based on 3D CT image reconstruction system for analysis and other aspects of the jaw morphology, stability and aesthetic dental implanting depend on 3D position of the implanting in the jaw. Since that, this paper proposes a full-featured interactive positioning method and discusses three-dimensional model of the coordinate transformation and coordinate data extraction technology. Combined the function of extraction database in VTK with the characteristics of needle puncturing for points, it obtains three-dimensional image coordinates of mandible by interactive operations to achieve the implant positioning of three-dimensional jaw image. The researchers compare this with the coordinates of the intelligent positioning of the implant. And through minor adjustment, the latter reduces the errors such as in the direction of the implant and implanting length, which effectively improves the accuracy and security of the virtual dental implant navigation system.