锁骨三维有限元模型的全程数字化构建

Digital construction of a three-dimensional finite element model of the clavicle

目的:采用有限元分析的方法构建锁骨三维模型,以期为锁骨骨折、骨不连的治疗,内固定的选择提供生物力学理论依据。方法:实验于2005-02在上海长海医院骨科完成。采用西门子SOMATOM Volume Zoom CT机对一健康成年男性自愿者(26岁)的锁骨进行CT断层成像,得到锁骨横截面图,将所得CT扫描图象以DICOM格式存入DELL个人计算机并按扫描顺序逐张扫描图片中骨骼周围的软组织,利用大型有限元分析软件ANSYS 7.0建立锁骨三维模型,采用三维十结点四面体实体单元对模型进行网络划分及计算。结果:获得了精确的锁骨多排螺旋CT扫描数据,断层间距为1mm。利用数据建立了58111个结点,26930个单元的锁骨三维有限元模型,实现了整个建模过程的全数字化。结论:全程数字化构建锁骨三维有限元模型,客观反映了锁骨真实解剖形态及生物力学行为。

AIM： To construct three-dimensional （3D） model of the clavicle by the method of finite element analysis and investigate its biomechanical significance for providing a new method for the research of clavicle fracture and non-union and the selection of internal fixation. METHODS： The experiment was performed at the Department of Orthopaedics, Changhai Hospital in February 2005. CT scanned one lived clavicle sample from a normal adult male volunteer aged 26 years with SOMATOM Volume Zoom CT machine, and the images of every layer of cross-section of clavicle were obtained. CT images were stored in DELL personal computer at DICOM format and soft tissues around skeleton were scanned in order. The clavicle model was constructed by means of ANSYS7.0 software, divided and calculated by 3D ten nodal point and tetrahedron entity unit. RESULTS： The 3D clavicle model, which was divided into 58 111 nodal points and 26 930 units with the fault interval of 1 mm, was constructed digitally for the judgment of accuracy. CONCLUSION： The digital construction of 3D clavicle model objectively reflects the real clavicle anatomy and biomechanical behavior.