摘要
背景：国内外已有学者将有限元分析用于脊柱的生物力学模拟,但对人工椎间盘置换前后腰椎生物力学系统的有限元模拟报道较少。目的：实验建立腰椎运动节段SB-ChaiteⅢ型人工椎间盘置换的新型三维有限元模型,并在此基础上进行有限元分析。设计、时间及地点：观察性实验于2003-12/2004-08在中南大学湘雅医院骨科研究室完成。对象：选择1名健康成年男性志愿者作为模拟对象,对脊柱T12～S1节段进行层厚2mm的连续扫描,共获得CT断层图像264幅,并对CT图像每隔15°进行三维重建,获取用于建立三维模型的相关数据。方法：将CT扫描的腰椎图像结合人体解剖学数据通过3DSMAX软件建模形成正常中国男性L4～5运动节段的三维模型。主要观察指标：结合SB-ChaiteⅢ型人工椎间盘的三维模型,用有限元分析软件SAP2000转换成有限元模型。结果：成功建立了腰椎运动节段的三维模型和有限元模型。L4～5节段SB-ChaiteⅢ型人工椎间盘置换的有限元模型总节点数为2542个,包括1924个Solid单元,592个Area单元,50个Link单元。结论：通过CT断层扫描、图像数字化处理及计算机辅助设计等方法,可以建立腰椎人工椎间盘置换的有限元模型。
BACKGROUND： Some scholars have used finite dement analysis to simulate spinal biodynamics. But there are few reports on finite element imitation of lumbar biodynamics system before and after artificial disc replacement. OBJECTIVE： This study aimed to do finite element analysis by establishing new three dimensional finite element models of SB-Chaite Ⅲ lumbar disc replacement. DESIGN, TIME AND SETTING： The observational experiments were performed at the Laboratory of Orthopaedics of Xiangya Hospital of Central South University from December 2003 to August 2004. PARTICIPANT： A healthy male volunteer served as simulation. His T12-S1 underwent continuous CT scanning. There were altogether 264 images with 2 mm in thickness each. Three-dimensional images were reconstructed every 15° in order to obtain the data for three-dimensional model. METHODS： The CT images and human anatomical data were processed by 3DSMAX software to establish three-dimensional L4-5 model of normal Chinese males. MAIN OUTCOME MEASURES： It was transformed to finite element model after processed by SAP2000 software together with SB-Chaite Ⅲ disc prosthesis model. RESULTS： The three-dimensional model and finite element model of lumbar spine were successfully established. The finite element model of SB-Chaite Ⅲ disc replacement in L4-5 spine was established. The total nodes were 2 542, including 1 924 Solid units, 592 Area units and 50 Link units. CONCLUSION： The finite element model of artificial disc replacement can be established by CT scanning, digital processor and computer aided design.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2008年第13期2405-2408,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research
