摘要
背景:近年来国内外学者进行了大量生物力学实验研究,试图解释颅脑损伤的发生过程和受力大小与损伤部位的相关性。但是目前针对颅底骨折原因的研究主要是直接暴力,对于间接暴力作用于颅底后颅底的应力分布情况尚无报道。目的:利用螺旋CT数据、三维重建软件及有限元分析软件,在普通PC机建立颅底三维有限元模型。方法:选择正常成年女性作为建模对象,无头颈部损伤、手术及其他病史,CT扫描前进行X射线常规检查排除器质性疾病。头部螺旋CT薄层扫描后,将图像数据输入医用图像与三维重建软件MIMICS中,建立颅底的三维可视化模型。将该模型简化优化后,导入有限元分析软件ANSYS10.0中,建立颅底的三维有限元模型。结果与结论:建立了由额骨、蝶骨、筛骨、颞骨、枕骨等共同组成的颅底实体模型,由于成年人骨缝闭合,所以将其视为一个整体。对实体模型划分网格,得到颅底的三维有限元模型,共有51053个单元,80273个节点。提示所建立的颅底有限元模型外形逼真,几何相似性好,可以用来进行颅底骨折的生物力学研究。
BACKGROUND：In recent years,a large number of biomechanical experiments have conducted to attempt to explain the correlation of craniocerebral injury with stress size and injury site. However,studies on skull fracture cause mainly focus on direct violence,and very little is known about the stress distributions in the skull exposed to indirect violence. OBJECTIVE：Using spiral CT data,three-dimensional reconstruction software,and finite element analysis software,to establish a three-dimensional finite element model of the skull in the ordinary PC. METHODS：Normal adult women were selected,free of head or neck injury,surgery or other history of disease. X-ray routine examination was performed to exclude organic disease,followed by head spiral CT TLC scanning. Image data were input into medical image and 3D reconstruction software MIMICS to establish the three-dimensional visualized model of the skull. The simplified model was optimized and introduced to finite element analysis software ANSYS 10.0 to establish three-dimensional finite element model of the skull. RESULTS AND CONCLUSION：The entity model of the skull base was composed of frontal bone,sphenoid,ethmoid,temporal bone and occipital bone. Since the adults＇ sutures are closed,the skull is viewed as a whole. The entity model was meshed to create a 3D finite element model which consisted of 51 053 units and 80 273 nodes. The established finite element model of the skull base is verisimilar geometrically,which can be used in the biomechanic research.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2010年第52期9726-9729,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research
