| 两种椎弓根螺钉钉道强化技术在骨质疏松绵羊椎体的应用 |
| |
| 引用本文： | 崔轶,雷伟,刘达,吴子祥,石磊,刘绪立.两种椎弓根螺钉钉道强化技术在骨质疏松绵羊椎体的应用[J].医用生物力学,2011,26(2):150-157. |
| |
| 作者姓名： | 崔轶 雷伟 刘达 吴子祥 石磊 刘绪立 |
| |
| 作者单位： | 第四军医大学西京医院 骨科;第四军医大学西京医院 骨科;第四军医大学西京医院 骨科;第四军医大学西京医院 骨科;第四军医大学西京医院 骨科;第四军医大学西京医院 骨科 |
| |
| 基金项目： | 国家高技术研究发展计划(863计划)(2007AA02Z468) |
| |
| 摘 要： | 目的应用绵羊骨质疏松椎体标本比较两种骨水泥强化技术对椎弓根螺钉固定强度的影响。方法经体外脱钙建立绵羊骨质疏松椎体标本40节,完全随机分为A组(单纯螺钉组);B组(低剂量整体强化组);C1组(低剂量局部强化组);C2组(高剂量局部强化组)。骨密度(bone mineral density,BMD)检测;螺旋CT及MicroCT的影像学观察;测试最大轴向拔出力(Fmax)及能量吸收值(E)。结果各组BMD下降约25%～30%(P>0.05),成功建立骨质疏松椎体模型。影像学观察:B组螺钉完全被骨水泥包裹,形成"骨-骨水泥-螺钉"界面;C2组螺钉周围骨水泥呈局部对称分布,形成"骨-螺钉"和"骨-骨水泥-螺钉"的共存界面。B,C1,2组椎体的Fmax及E均显著高于A组(P<0.05);B,C2组椎体的Fmax及E均明显高于C1组(P<0.05);B,C2组椎体间Fmax及E无显著性差异(P>0.05)。结论钉道整体强化及局部强化技术均能显著提高骨质疏松情况下椎弓根螺钉的固定强度;钉道局部强化技术通过提高注射剂量,可以达到与整体强化技术相近的强化效果。
|
| 关 键 词： | 骨质疏松 钉道强化 CT扫描 力学测试 椎体体外脱矿化模型 生物力学 |
| 收稿时间： | 2010/10/13 0:00:00 |
| 修稿时间： | 2010/12/16 0:00:00 |
Application of two different pedicle screw augmentation techniques used for in vitro sheep osteoporotic vertebra model |
| |
| CUI Yi,LEI Wei,LIU D,WU Zi-xiang,SHI Lei and LIU Xu-li.Application of two different pedicle screw augmentation techniques used for in vitro sheep osteoporotic vertebra model[J].Journal of Medical Biomechanics,2011,26(2):150-157. |
| |
| Authors: | CUI Yi LEI Wei LIU D WU Zi-xiang SHI Lei and LIU Xu-li |
| |
| Institution: | Department of Orthopaedic Surgery, Xijing Hospital, the Fourth Military Medical University;Department of Orthopaedic Surgery, Xijing Hospital, the Fourth Military Medical University;Department of Orthopaedic Surgery, Xijing Hospital, the Fourth Military Medical University;Department of Orthopaedic Surgery, Xijing Hospital, the Fourth Military Medical University;Department of Orthopaedic Surgery, Xijing Hospital, the Fourth Military Medical University;Department of Orthopaedic Surgery, Xijing Hospital, the Fourth Military Medical University |
| |
| Abstract: | Objective To determine the effects of the two kinds of pedicle screws with cement augmentation used for in vitro sheep osteoporotic vertebra model.Method Forty osteoporosis specimens of lumbar vertebrae demineralized by decalcification solution were complete randomly devided into four groups including Group A(only screw),Group B(whole trajectory filled with PMMA),Group C1(partial trajectory filled with PMMA) and Group C2(partial trajectory filled with PMMA).Osteoporosis specimens from four groups were teste... |
| |
| Keywords: | Osteoporosis Pedicle screw augmentation CT scans Mechanical testing In vitro demineralized vertebra model Biomechanics |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《医用生物力学》浏览原始摘要信息 |
| 点击此处可从《医用生物力学》下载免费的PDF全文 |
|
