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| 骨水泥量及分布对椎体成形术后相邻椎体生物力学影 响的三维有限元分析 |
| Effect of the volume and distribution of bone cement on the adjacent vertebrae after vertebroplasty ： A finite analysis |
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| DOI： |
| 中文关键词: 椎体成形术 骨水泥 有限元分析 生物力学 |
| 英文关键词: |
| 基金项目: |
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| 摘要点击次数: 1040 |
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| 中文摘要: |
| 目的利用三维有限元分析骨水泥量及分布对相邻椎体生物力学的影响。方法通过CT数据，利用Mimksl0.0、 Geomagic studio 11. 0、HyperMesh 11. 0、Abaqus 6. 9有限元分析软件，建立骨质疏松性椎体模型，根据骨水泥量及分布方式建成 有限元模型，施加载荷，测量相邻椎体应力分布变化情况。结果垂直载荷下，T12椎体皮质骨等效应力在单侧2 ml骨水泥 灌注中较髙为29.49 MPa;下终板所受应力在单侧偏中4 ml骨水泥灌注中较髙为3.93 MPa。L2皮质骨等效应力在单侧骨水 泥灌注较髙为15. 29 MPa;上终板所受应力在单侧偏中2 ml骨水泥灌注中较髙为4. 53 MPa。侧屈载荷下，T12椎体皮质骨所 受等效应力在单侧偏中4 ml骨水泥灌注较髙114. 83 MPa;下终板所受应力在双侧骨水泥4 ml灌注中较髙为8. 62 MPa。L2 椎体皮质骨所受等效应力在单侧偏中4 ml骨水泥中较髙为96. 41 MPa;上终板所受应力在单侧偏中4 ml骨水泥灌注中较髙 为9. 80 MPa。旋转载荷下，T12椎体皮质骨所受等效应力在单侧2 ml骨水泥灌注中较髙为119. 42 MPa;下终板所受应力在单 侧2 ml骨水泥灌注中较髙为8. 77 MPa。L2椎体皮质骨所受等效应力在单侧2 ml骨水泥灌注中较髙为146. 31 MPa;L2上终 板所受应力在单侧2 ml骨水泥灌注中较髙为7.84 MPa。结论骨水泥量及分布是相邻椎体发生骨折的一个重要因素，但与 椎体所受力学载荷方向也密切相关。 |
| 英文摘要: |
| Objective To analyze the biomechanical effect of the volume and distribution of bone cement on the adjacent vertebrae using 3D finite analysis. Methods Using Mimics 10.0，Geomagic studio 11.0，HyperMesh 11.0，and Abaqus 6.9 softwares，a geometric reconstruction of the vertebral body was developed using the CT 3D reconstruction data. The finite model was established according to the volume and distribution of bone cement. The loading was performed to investigate the force distribution of the adjacent vertebrae. Results Under the vertical loading，the von Mises stress on the cortical bone of T12 was 29. 49 MPa in the unilateral 2 ml bone cement perfusion. The von Mises stress on the lower endplate was higher to 3. 93 MPa in the unilateral across the midline 2 ml bone cement perfusion. The von Mises stress on cortical bone of L2 was 15. 29 MPa in the unilateral bone cement perfusion. The von Mises stress on the upper endplate was 4. 53 MPa in the unilateral across the midline 2 ml bone cement perfusion. Under the lateral bending load，the von Mises stress on cortical bone of T12 was 114. 83 MPa in the unilateral across the midline 4 ml bone cement perfusion. The von Mises stress on the lower endplate was 8. 62 MPa in the bipedicular 4 ml bone cement perfusion. The von Mises stress on cortical bone of L2 was 96. 41 MPa in the unilateral across the midline 4 ml bone cement perfusion. The von Mises stress on the upper endplate was 9. 80 MPa in the unilateral across the midline 4 ml bone cement perfusion. Under the rotating load，the von Mises stress on cortical bone of T12 was 119. 42 MPa in the unilateral |
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