Xia Delin, Gui Lai, Zhang Zhiyong, Lu Changsheng, Niu Feng, Jin Ji, Liu Xiaoqing
Department of Craniomaxliofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100041, PR China.
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi. 2005 Oct;19(10):811-4.
To investigate the methods of establishing 3-dimensional skull model using electron beam CT (EBCT) data rapid prototyping technique, and to discuss its application in repairing cranio-maxillo-facial trauma.
The data were obtained by EBCT continuous volumetric scanning with 1.0 mm slice at thickness. The data were transferred to work-station for 3-dimensional surface reconstruction by computer-aided design software and the images were saved as STL file. The data can be used to control a laser rapid-prototyping device (AFS-320QZ) to construct geometric model. The material for the model construction is a kind of laser-sensitive resin power, which will become a mass when scanned by laser beam. The design and simulation of operation can be done on the model. The image data were transferred to the device slice by slice. Thus a geometric model is constructed according to the image data by repeating this process. Preoperative analysis, surgery simulation and implant of bone defect could be done on this computer-aided manufactured 3D model. One case of cranio-maxillo-facial bone defect resulting from trauma was reconstructed with this method. The EBCT scanning showed that the defect area was 4 cm x 6 cm. The nose was flat and deviated to left.
The 3-dimensional skull was reconstructed with EBCT data and rapid prototyping technique. The model can display the structure of 3-dimensional anatomy and their relationship. The prefabricated implant by 3-dimensional model was well-matched with defect. The deformities of flat and deviated nose were corrected. The clinical result was satisfactory after a follow-up of 17 months.
The 3-dimensional model of skull can replicate the prototype of disease and play an important role in the diagnosis and simulation of operation for repairing cranio-maxillo-facial trauma.
探讨利用电子束CT（EBCT）数据快速成型技术建立三维颅骨模型的方法，并探讨其在颅颌面创伤修复中的应用。
采用EBCT连续容积扫描，层厚1.0mm获取数据。将数据传输至工作站，通过计算机辅助设计软件进行三维表面重建，图像保存为STL文件。该数据可用于控制激光快速成型设备（AFS-320QZ）构建几何模型。模型构建材料为一种激光敏感树脂粉末，经激光束扫描后固化成型。可在模型上进行手术设计与模拟。将图像数据逐片传输至设备，通过重复该过程，依据图像数据构建几何模型。利用该计算机辅助制造的三维模型可进行术前分析、手术模拟及骨缺损植入。采用该方法对1例因创伤导致的颅颌面骨缺损进行了修复。EBCT扫描显示缺损面积为4cm×6cm，鼻扁平且向左偏斜。
利用EBCT数据和快速成型技术重建了三维颅骨模型。该模型能够显示三维解剖结构及其相互关系。利用三维模型预制的植入物与缺损匹配良好。扁平及偏斜的鼻畸形得到矫正。随访17个月，临床效果满意。
颅骨三维模型能够复制病变原型，在颅颌面创伤修复的诊断及手术模拟中发挥重要作用。
