Biomechanical Testing Simulation of a Cadaver Spine Specimen: Development and Evaluation Study.
颈椎标本的生物力学测试仿真
发展与评价研究
Biomechanics 生物力学
Spine. 32(11):E330-E336, May 15, 2007.
Ahn, Hyung Soo MD, PhD *; DiAngelo, Denis J. PhD +
Abstract: 摘要
Study Design. This article describes a computer model of the cadaver cervical spine specimen and virtual biomechanical testing.
研究规划: 本文阐述了一个颈椎尸体标本的计算机模型，并进行了虚拟生物力学测试。
Objectives. To develop a graphics-oriented, multibody model of a cadaver cervical spine and to build a virtual laboratory simulator for the biomechanical testing using physics-based dynamic simulation techniques.
目的：建立一个基于图像的尸体颈椎多体模型，使用基于物理的动力学仿真技术为生物力学测试建立虚拟实验室仿真器。
Summary of Background Data. Physics-based computer simulations apply the laws of physics to solid bodies with defined material properties. This technique can be used to create a virtual simulator for the biomechanical testing of a human cadaver spine. An accurate virtual model and simulation would complement tissue-based in vitro studies by providing a consistent test bed with minimal variability and by reducing cost.
背景简介：基于物理学的计算机仿真使用预定义的材料参数将物理学原理应用于实体。该技术可以为人颈椎尸体标本生物力学测试建立虚拟仿真器。精确的虚拟模型和仿真将通过提供因个体差异最小而一致的测试平台和降低成本而弥补基于组织的体外试验的不足。
Method. The geometry of cervical vertebrae was created from computed tomography images. Joints linking adjacent vertebrae were modeled as a triple-joint complex, comprised of intervertebral disc joints in the anterior region, 2 facet joints in the posterior region, and the surrounding ligament structure. A virtual laboratory simulation of an in vitro testing protocol was performed to evaluate the model responses during flexion, extension, and lateral bending.
方法：颈椎几何形态基于CT图像建立。联接相邻椎体的关节由3个关节复合体构成，包括前部的椎间盘关节和后部的两个小关节。体外试验的虚拟实验室仿真应用于评价颈椎前屈、后伸和侧弯的模型响应。
Results. For kinematic evaluation, the rotation of motion segment unit, coupling behaviors, and 3-dimensional helical axes of motion were analyzed. The simulation results were in correlation with the findings of in vitro tests and published data. For kinetic evaluation, the forces of the intervertebral discs and facet joints of each segment were determined and visually animated.
结果：对运动学评价，分析了运动单元的旋转、耦合现象和三维运动螺旋轴。仿真结果与体外测试和文献报道数据一致。对动力学评价，确定了椎间盘和小关节受力，并可视化。
Conclusions. This methodology produced a realistic visualization of in vitro experiment, and allowed for the analyses of the kinematics and kinetics of the cadaver cervical spine. With graphical illustrations and animation features, this modeling technique has provided vivid and intuitive information.
结论：该方法使体外测试可视化并可以进行尸体颈椎的运动学和动力学分析。通过图像和动画，该模型技术可以提供生动和直觉的信息
(C) 2007 Lippincott Williams & Wilkins, Inc.
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