摘要目的 探讨山羊颅骨缺损的三维模型在颅颌面外科中的应用价值.方法 以成年山羊为实验对象,建立颅骨缺损的动物模型.采用电子束CT(EBCT)扫描,CT图像在工作站进行三维重建,最终的数据转换为快速成型(RP)机所能接受的文件格式,成型机通过“分层制造、逐层叠加”的原理制造出三维模型.结果 采用EBCT以1 mm层厚逐层连续薄层容积扫描作为原始数据源,将获得的图像经过滤波、降糙、二值化轮廓识别和提取、三维重建、计算机辅助设计(CAD)曲面重构、实体重构,以光敏树脂为材料,运用液态树脂选择性固化法激光快速成型技术成功地复制了山羊颅骨缺损的三维仿真头颅模型.结论 山羊颅骨缺损头颅模型的建立,对颅骨缺损的三维测量,个性化修复以及相关的基础和临床研究均具有重要意义.

abstractsObjective To establish a cranial bone defect model of goat and to study application in craniomaxillo-facial surgery.Methods Electron beam computed tomography (EBCT) scanner was used to scan goat'heads and faces in series and thin layers.Data of EBCT were input in workstation from digital inlet,and then to three-dimensional reconstruction with method of surface shadow.After final data were transformed to the files,the rapid prototyping machine was able to identify and establish the 3D model.Results The EBCT continuous thin-layer (1 mm) scanning data were passed to wave filter,falling coarse,distinguishing and collecting the outline,3D-reconstruction,curved surface reconstruction with CAD and the substance reconstruction.The final data were input into the laser rapid prototyping machine.Three-dimensional bionic cranium models were fabricated by machine in layer by layer manufacturing principle.Conclusions Establishment of the cranial bone defect model in the goat is very useful to the three-dimensional measurement,individualized reconstruction and basic and clinical research for the cranial bone defect.