多来源颅颌面三维数字化模型的建立  

Establishment of a three-dimensional digital model based on multi-source craniofacial profile

作　　者：马俐丽[1] 于岚[1] 徐宝华[1] 

机构地区：[1]卫生部中日友好医院口腔医学中心,北京100029

出　　处：《中华医学美学美容杂志》2013年第2期90-92,共3页Chinese Journal of Medical Aesthetics and Cosmetology

基　　金：基金项目：国家自然科学基金资助项目（编号：30772451）;中日友好医院院级基金资助课题（编号：2010-QN-21）

摘　　要：目的建立一个满足临床和科研要求的可视化的多来源多精度的颅颌面三维数字化模型。方法采用锥体束断层CT（CBCT）扫描整个头部，利用不同组织的亨氏单位（Houns Field值）的不同，提取出面部软组织、颌面部骨骼以及牙列3种组织结构．利用三维重建的方法．重构出面部、颌骨和牙齿三部分的数字化三维模型，同时采用激光扫描的方法获得带有纹理信息的面部三维模型以及高精度三维数字化牙列模型，利用三维图形学中的配准技术。将激光扫描获得的面部、三维模型转化到CT来源的重建的三维颅颌面数字化模型所在坐标系。结果获得一个带有颜色信息的面部软组织、高精度牙列和清晰骨骼的复合三维数字化颅颌面模型。结论多来源的三维数字化颅颌面模型是一种能够达到临床和科研要求的高精度数字化模型。Objective To establish a three-dimensional digitized visible model to meet the clini cal and research needs. Methods The head of the volunteer was scanned by a cone beam CT （CBCT）. The bone tissue, the facial soft tissue and the teeth were extracted from the cone beam CT raw data according to the different Houns field values. The 3D digital craniofacial model was reconstructed from the three tissues extracted from the CBCT original data. The 3D dental model with high resolution was acquired by scanning the dental cast with the laser scanner. The 3D facial model with texture was acquired by scanning the volunteer＇s face directly by other laser scanner. With the registration algorithm in 3D graphics, the 3D facial model with texture and the 3D dental model with high resolution were transformed to the same coordinate which was of the 3D digital craniofaeial model. Results We acquired a complicated 3D eraniofaeial digital model which combined the teeth model with high resolution, the hone model and the face model with texture. Conclusions The method is able to accurately establish the craniofacial digital model.

关 键 词：锥体束断层CT 三维模型 计算机重建 颅颌面 

分 类 号：R783.5[医药卫生—口腔医学]