基于增强现实的下颌角截骨配准技术的研究  

Registration technology for mandibular angle osteotomy based on augmented reality

作　　者：朱明[1] 柴岗[1] 张艳[1] 马晓飞[1] 俞哲元[1] 朱一佳[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院整复外科,上海200011

出　　处：《上海口腔医学》2010年第6期571-574,共4页Shanghai Journal of Stomatology

基　　金：上海高校创新团队发展计划资助项目~~

摘　　要：目的:通过增强现实技术,将下颌骨的虚拟三维数字模型及术前设计的预截骨平面同时显示在快速成型实体模型上,实现虚拟图像与实体的重叠配准。方法:选取20例下颌骨肥大患者,行三维CT扫描,重建下颌骨三维数字模型。利用上海九院整形设计系统完成术前设计,生成截骨平面,并与下颌骨合并为STL文件。取患者下牙石膏牙模,制作包含下牙咬合板在内的标志物支架,固定于石膏牙模,两者一并扫描。然后将扫描数据和下颌骨三维数字模型数据导入同一三维处理平台,选择右第一磨牙的远中舌尖、第二磨牙的近中舌尖、左第一磨牙的近中舌尖,进行标志物支架和下颌骨的拟合,生成虚拟影像。此时的三维虚拟数字化影像包括标志物、下颌骨及预截骨平面。然后将标志物支架的下牙咬合板固定于下颌骨快速成型模型上,采用增强现实视频检测方法,用视频捕捉器识别到标志物后,将虚拟影像与下颌骨快速成型实体模型进行配准。结果:该技术实现了三维虚拟数字化影像与下颌骨快速成型模型的虚实融合叠加,使下颌骨和术前设计的预截骨平面实时显示在下颌骨实体上。结论:本研究建立的配准方法具有良好的重复性,有望成为下颌角截骨术可视化手术有效的配准途径,为未来增强现实手术应用研究奠定了基础。PURPOSE：To establish an effective path to register the operative plan to the real model of mandible made by rapid prototyping（RP） technology.METHODS：Computerize tomography（CT） was performed on 20 patients to create 3D images,and computer aided operation planning information can be merged with the 3D images.Then dental cast was used to fix the signal which can be recognized by the software.The dental cast was transformed to 3D data with a laser scanner and a programmer that run on a personal computer named Rapidform matching the dental cast and the mandible image to generate the virtual image.Then the registration was achieved by video monitoring system.RESULTS：By using this technology,the virtual image of mandible and the cutting planes both can overlay the real model of mandible made by RP.CONCLUSIONS：This study found an effective way for registration by using dental cast,and this way might be a powerful option for the registration of augmented reality.

关 键 词：增强现实 下颌角截骨术 牙模 配准 

分 类 号：R782.2.3[医药卫生—口腔医学]