单侧PKP骨水泥注射过中线分布对压缩性骨折椎体两侧刚度的影响

被引:182
作者
陈柏龄 [1 ]
谢登辉 [1 ,2 ]
黎艺强 [1 ]
庄新明 [1 ]
杨晓曦 [1 ]
于滨生 [1 ]
郑召民 [1 ]
机构
[1] 中山大学附属第一医院脊柱外科
[2] 广州市儿童医院骨科
关键词
生物力学; 经皮椎体后凸成形术; 骨水泥; 侧方压缩;
D O I
暂无
中图分类号
R687.3 [骨骼手术];
学科分类号
100220 [骨科学];
摘要
目的:评价单侧椎体后凸成形术(PKP)中骨水泥注射超越椎体中线与否对椎体轴向及两侧刚度的影响。方法:3具防腐成人胸腰椎椎体标本(T4~L1)用于实验。通过MTS平台给椎体施加轴向压力,制作压缩性椎体骨折模型,同时进行球囊辅助下经单侧椎弓根穿刺椎体后凸成形术,根据骨水泥是否过椎体中线分为两组,骨水泥注射不过椎体中线(A组,n=9);骨水泥注射过椎体中线(B组,n=8),骨水泥注射量为椎体体积的10%。24h后放置在MTS-858材料实验平台上,给标本分别施加0~300N轴向和侧方压力载荷,记录并比较骨水泥注射术后,两组椎体轴向及两侧的刚度差异。结果:轴向压缩载荷下,A组与B组间轴向压缩刚度无显著差异(P>0.05);在椎体侧方压缩载荷下,尽管A组椎体骨水泥穿刺侧的刚度与B组间差异无显著性(P>0.05);但在非穿刺侧刚度上,B组显著高于A组,差异有显著性(P<0.05)。结论:行单侧PKP时,若骨水泥填充不过椎体中线时,则非穿刺侧刚度明显低于穿刺侧,而骨水泥填充过中线时,则两侧椎体刚度可同时得到显著强化。
引用
收藏
页码:118 / 121
页数:4
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