| 椎体后凸成形对邻近节段力学影响的有限元分析 |
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| 引用本文： | 费琦,王炳强,杨雍,李东,唐海,李锦军.椎体后凸成形对邻近节段力学影响的有限元分析[J].中国组织工程研究与临床康复,2010,14(35). |
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| 作者姓名： | 费琦 王炳强 杨雍 李东 唐海 李锦军 |
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| 作者单位： | 首都医科大学附属北京友谊医院骨科,北京市,100050 |
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| 摘 要： | 背景:椎体后凸成形术自应用临床以来取得了令人鼓舞的临床效果,但是术后邻近椎体发生骨折时有报道.从生物力学角度来分析邻近椎体发生骨折的可能原因具有重要价值.目的:以有限元方法观察椎体后凸成形术对相邻椎体生物力学的影响,分析相邻椎体继发骨折的原因.方法:利用MIMICS软件对1例T12压缩骨折椎体后凸成形术前后的CT图片进行预处理,后导入ABAQUS软件中建立T10～L2的三维有限元模型,设置0.3,1.0,4.0 MPa三种轴向载荷进行生物力学分析,观察不同载荷下模型整体及各部分的Von Mises应力,重点评价椎体后凸成形术对骨折相邻椎体生物力学的影响.结果与结论:成功建立了椎体后凸成形术前后的三维有限元模型,当轴向压力以0.3,1.0,4.0 MPa增加后,椎间盘、软骨终板和椎体整体的应力也成比例增加.椎体后凸成形术后脊柱胸腰段各部位的应力开始重新分布,增强椎体(T12)的相邻椎间盘(T11～12、T12～L1)及相邻终板(T11下终板、L1上终板)的应力增强区域增加;T12相邻椎体(T11,L1)所受最大应力明显增加,但远端椎体(T10,L2)的最大应力明显减少.提示椎体后凸成形术后引起上下相邻椎体继发骨折可能与术后生物力学行为的改变有关.
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| 关 键 词： | 骨质疏松 骨折 胸椎 腰椎 椎体后凸成形术 有限元分析 应力 |
Biomechanical effects of percutaneous kyphoplasty on adjacent vertebrae: A finite element analysis |
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| Fei Qi,Wang Bing-qiang,Yang Yong,Li Dong,Tang Hai,Li Jin-jun.Biomechanical effects of percutaneous kyphoplasty on adjacent vertebrae: A finite element analysis[J].Journal of Clinical Rehabilitative Tissue Engineering Research,2010,14(35). |
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| Authors: | Fei Qi Wang Bing-qiang Yang Yong Li Dong Tang Hai Li Jin-jun |
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| Affiliation: | Fei Qi,Wang Bing-qiang,Yang Yong,Li Dong,Tang Hai,Li Jin-jun Department of Orthopaedics,Beijing Friendship Hospital,Capital Medical University,Beijing 100050,China |
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| Abstract: | BACKGROUND: Kyphoplasty has obtained favorable clinical effects, but adjacent vertebral fracture has been reported. Therefore, it is important to analyze the possible reasons for adjacent vertebral fracture based on biomechanics. OBJECTIVE: To explore the biomechanical effectsof percutaneous kyphoplasty (PKP) on adjacent vertebrae and analyze causes for adjacent vertebral fracture. METHODS: T10-L2 segment data were obtained from CT scans of a female with single T12 compressed fracture who underwent PKP. A t... |
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