椎体成形改进装置对骨质疏松性椎体压缩骨折模型的生物力学分析

发布时间：2018-09-10 11:34

【摘要】：[目的]应用椎体成形改进装置,为骨质疏松性椎体压缩骨折模型施行椎体成形术,与传统的经单侧及双侧椎弓根注射的椎体成形术相比较,评估椎体成形改进装置的临床应用价值。[方法]选用成年猪胸腰段五联椎体60具,随机分为A、B、C、D组,每组15具,A、B、C组均制备成中央椎体OVCFs模型,其中A组应用椎体成形改进装置行椎体中央成形术(AVP),B组行经单侧椎弓根椎体成形术(UVP),C组行经双侧椎弓根椎体成形术(BVP),D组为无骨质疏松组。术后CT观察骨水泥位置分布。采用电子万能试验机进行压缩试验,比较各组骨折椎体在充分复位和定量骨水泥强化后脊柱单元的极限抗压强度、刚度,并比较各类型手术操作所需时间及X线暴露时间。[结果]A、B、C组骨水泥注射量组间无显著性差异;行椎体成形术后,A组和C组在脊柱单元极限抗压强度S2与刚度R2恢复方面优于B组,差异有统计学意义(P0.05),与对照组D组比较无明显差别(P0.05);A、C组骨水泥椎体中央分布率显著高于B组;A、B组的手术时间显著低于C组,X线暴露时间方面,A、B组低于C组。[结论]椎体成形改进装置实施的椎体成形术能够将骨水泥填充在强化椎的中央区,显著提高脊柱单元的生物力学稳定性,且在手术时间及X线暴露时间方面具有优势。
[Abstract]:[objective] to apply an improved vertebroplasty device to perform vertebroplasty for osteoporotic vertebral compression fracture model, compared with the traditional vertebroplasty with unilateral and bilateral pedicle injection. To evaluate the clinical application value of vertebral body shape improvement device. [methods] A total of 60 adult porcine thoracolumbar vertebrae were randomly divided into two groups: group D (n = 15) and group C (n = 15). The central vertebral body OVCFs model was established in each group (n = 15). Group A was treated with central vertebroplasty (AVP) and group B with unilateral pedicle vertebroplasty (UVP) and group C with bilateral pedicle vertebroplasty (BVP) D) without osteoporosis. The distribution of bone cement was observed by CT after operation. The compression test was carried out with electronic universal test machine to compare the ultimate compressive strength and stiffness of the spinal unit after full reduction and quantitative bone cement enhancement. The time required for each type of operation and the time of X-ray exposure were also compared. [results] there was no significant difference in the amount of bone cement injection between group A and group C, and the recovery of limited compressive strength S2 and stiffness R2 of spinal unit in group A and group C was better than that in group B after vertebroplasty. The difference was statistically significant (P0.05), compared with the control group D, there was no significant difference (P0.05) the central distribution rate of bone cement in group A was significantly higher than that in group B (P < 0.05), but the operating time of group B was significantly lower than that of group B (P < 0.05), and that of group B was lower than that of group C (P < 0.05). [conclusion] Vertebroplasty with improved vertebroplasty device can significantly improve the biomechanical stability of spinal unit by filling bone cement in the central area of the strengthened vertebrae, and has advantages in operation time and X-ray exposure time.
【作者单位】：泰山医学院附属泰山医院;军委政治工作部原机关门诊部;
【基金】：泰安市科技发展计划(编号:20132076)国家实用新型专利,专利号:ZL201420320925
【分类号】：R687.3

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