| 后凸成形术对椎体生物力学影响的有限元研究 |
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| 引用本文： | 余斌峰,张力成,杨国敬,吴立军. 后凸成形术对椎体生物力学影响的有限元研究[J]. 中医正骨, 2010, 22(1): 6-8 |
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| 作者姓名： | 余斌峰 张力成 杨国敬 吴立军 |
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| 作者单位： | 1. 温州医学院附属第三医院骨科,浙江,温州,325200
2. 温州医学院数字化医学研究所,浙江,温州,325035 |
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| 摘 要： | 目的:利用骨质疏松腰椎三维有限元模型,评价后凸成型术(percutaneous kyphoplasty,PKP)对治疗节段和相邻非治疗节段椎体生物力学影响。方法:选取青壮年男性正常人体脊柱标本1具,范围为L1~L2,建立L1~L2的三维脊柱功能单位(functional spinalunit,FSU)的骨质疏松有限元模型。模拟经皮穿刺椎体后凸成形术(PKP)过程在L2椎体中置入骨水泥,分析轴向压缩、前屈和后伸3种加载状态下手术前后治疗节段和相邻非治疗节段椎体应力和应变的变化。结果:骨水泥对邻近椎体生物力学的影响极小,但治疗节段椎体增强区域的应力增加和应力分布变化明显。结论:三维有限元分析表明骨水泥能增强治疗节段的总体强度和刚度水平,有利于椎体功能的重建。但随后的邻近椎体骨折可能归因于潜在的病因学(骨质疏松)而不是外科手术的干预。
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| 关 键 词： | 脊柱 后凸成形术 骨水泥 有限元分析 应力 |
The biomechanical effects of kyphoplasty on vertebral bodies:a finite-element study |
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| YU Bin-feng,ZHANG Li-cheng,YANG Guo-jing,WU Li-jun. The biomechanical effects of kyphoplasty on vertebral bodies:a finite-element study[J]. The Journal of Traditional Chinese Orthopedics and Traumatology, 2010, 22(1): 6-8 |
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| Authors: | YU Bin-feng ZHANG Li-cheng YANG Guo-jing WU Li-jun |
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| Affiliation: | YU Bin-feng,ZHANG Li-cheng,YANG Guo-jing,WU Li-jun.Department of Orthopaedics,The Third Affiliated Hospital of WenZhou Medical College,Zhejiang 325200,China |
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| Abstract: | Objective:To evaluate the biomechanical effects of kyphoplasty on treated and adjacent nontreated vertebral bodies using three-dimensional finite element model of osteoporotic lumbar.Methods:L1~L2 motion segment data of the cadaver of an young man who had no abnormal findings on roentgenograms were obtained from computed tomography(CT)scans.Three-dimensional model of L1~L2 was established with Mimics software,and finite element model of osteoporosis L1~L2 functional spinal unit(FSU)was established by Ansys ... |
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| Keywords: | spine kyphoplasty bone cement finite element analysis stress |
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