三维模型技术在颅面创伤修复中的应用

Clinical application of three-dimensional model in repair of complex craniofacial trauma

目的 利用电子束CT扫描、三维重建和快速成型技术制作三维头颅模型 ,探讨其在治疗严重颅颌面骨折、缺损中的意义。 方法 2 6例严重颅颌面创伤患者 ,电子束CT连续薄层容积扫描 ,CT数据传至工作站后行三维重建并转换成STL文件格式。将处理后的数据输入AFS -32 0QZ激光快速成型机制造三维头颅模型。在此模型上直接进行测量 设计、手术模拟和个性化骨缺损修复体的预制 ,并制定相应的治疗计划。 结果 根据CT数据制作的三维模型能立体、精确地显示颅面三维解剖结构及其相互关系 ,再现畸形或病体原型 ,为准确了解和掌握病情并制定合理的手术治疗计划提供了极为重要的依据 ,提高了手术治疗效果。 结论 CT扫描数据基础上制作的三维模型是现代颅颌面创伤修复的新型诊断和手术模拟方法 ,具有重要的临床实用价值。

Objective To construct a geometric skull model by using three dimensional reconstruction, computer tomography scanning and rapid prototyping technology and evaluate its significance in treatment of complex craniofacial trauma or lesion. Methods A total of 26 patients with complex craniofacial fractures resulted from trauma received continuous volumetric scanning of their skulls and the data acquisition was done by an electron beam computed tomography, by which reconstruction was done and the obtained images saved as STL files. Then, the data were input into rapid prototyping machine AFS 320QZ to make three dimensional geometric model. Direct measurement, designation, alloplastic implant prefabrication and surgery simulation could be done on this three dimensional model. Results A computer aided model according to CT data could represent the three dimensional anatomic structures and their relationships precisely, as provided important basis for accurate understanding of disease status and reasonable surgical plans and helped improve the curative effect of surgery. Conclusions Three dimensional model based on CT data is an important methods for diagnosis and surgery simulation in the modern craniomaxillofacial repair. It has great significance in the clinical application.