摘要
目的建立上颈椎不稳的三维有限元模型,并探索其临床治疗的意义。方法首先建立上颈椎正常的三维非线性有限元模型,在此基础上结合临床上的颈椎不稳病例,通过有限元软件的应用,建立上颈椎不稳的三维有限元模型并进行有限元分析。在屈、伸、侧屈、旋转等工况下,测量并比较上颈椎脱位模型与正常上颈椎模型的活动度(ROM)差异。结果所建上颈椎有限元模型外观清晰逼真,几何相似性良好。上颈椎不稳模型各个工况下的活动度与正常上颈椎模型相比明显增大,与体外生物力学实验结果基本吻合。结论有限元三维模型的建立提供了一种便捷而精确的方法。上颈椎不稳的非线性三维有限元模型能够较好地模拟临床病例,从而指导制定临床治疗策略。
Objective To establish the three-dimensional finite element model of atlantoaxial instability and explore its clinical significance. Methods By first establishing the three-dimensional nonlinear finite element model of the normal upper cervical spine, on the basis of which clinical cases of cervical vertebra instability were combined, the three-dimensional finite element model of the up-per cervical instability was established and finite element analysis was carried out through the application of the finite element software. In flexion, extension, lateral flexion, rotation and other conditions, the differences of activity between normal model and dislocation model were measured and compared. Results The established finite element model was clear in appearance and had good geometric similarity. The activity of the upper cervical instability model was increased apparently compared with the normal upper cervical spine model, which was consistent with the in vitro biomechanical experimental results. Conclusion The establishment of the three-dimen-sional finite element model provides a convenient and accurate method. The nonlinear three-dimensional finite element model of upper cervical instability can better simulate the clinical cases, so as to guide the clinical treatment strategy.
出处
《辽宁医学院学报》
CAS
2014年第5期46-48,I0004,共4页
Journal of Liaoning Medical University (LNMU) Bimonthly
基金
辽宁省教育厅资助项目
项目编号:L2011146
关键词
上颈椎
三维有限元模型
医学工程学
upper cervical spine
three-dimensional finite element model
medical engineering