三维有限元建模分析椎体成形术后骨水泥体积对邻近椎体骨折发生的影响  

Analysis of the Influence of Bone Cement Volume on Fracture of Adjacent Vertebral Body after Vertebroplasty with the 3D Finite Element Model

作　　者：马朋朋[1] 蔡明 张春林[1] 刘肃[1] 张鑫[1] 宗治国[1] 苏峰[1] 李伟[1] 张志敏[1] MA Peng-peng;CAI Ming;ZHANG Chun-lin(The First Affiliated Hopital of Hebei North University,Zhangjiakou,075000,Hebei Province,P.R.C.;不详)

机构地区：[1]河北北方学院附属第一医院,河北省张家口市075000 [2]河北北方学院,河北省张家口市075000

出　　处：《中国数字医学》2020年第7期92-94,共3页China Digital Medicine

基　　金：2019年度河北省医学科学研究课题计划(编号:20190906)。

摘　　要：目的:研究椎体成形术不同体积的骨水泥对邻近椎体的生物力学影响,指导今后手术操作。方法:利用志愿者胸腰椎CT数据,建立T12-L2节段脊柱单元的三维有限元模型。模拟L1椎体内注入骨水泥,行椎体成形术。通过改变骨水泥的体积,研究术后邻椎应力及形变的生物力学影响。结果:相同应力下,随着骨水泥体积的增加,临近椎体的应力逐渐增大,增加了邻椎新发骨折的可能。在形变云图中,发现T12椎体的最大形变值大于L1椎体的最大形变值。在应力云图中,发现T12椎体的应力显著大于L1椎体(P<0.05)。结论:骨水泥体积被认为是椎体成形术后影响邻椎新发骨折的重要因素。椎体成形术后,上位椎体较下位椎体更容易发生新的骨折。Objective: To study the biomechanical effects of different volumes of bone cement on adjacent vertebrae during vertebroplasty. Methods: Three-dimensional finite element model of T12-L2 segment spinal unit was established by using CT data of thoracolumbar spine of volunteers. Bone cement was injected into L1 vertebroplasty. By changing the volume of bone cement, the biomechanical effects of stress and deformation in adjacent vertebrae were studied. Results: Under the same stress, with the increase of the volume of bone cement, the stress of adjacent vertebra gradually increased, increasing the possibility of new fracture of adjacent vertebra. In the deformation cloud map, it is found that the maximum deformation value of vertebral body T12 is larger than that of vertebral body L1. In the stress cloud map, it was found that the stress of vertebra T12 was significantly greater than that of vertebra L1(P<0.05). Conclusion: The volume of bone cement is considered to be an important factor affecting the new fracture of adjacent vertebra after vertebroplasty. After vertebroplasty, the upper vertebra is more prone to new fractures than the lower vertebra.

关 键 词：有限元分析 骨水泥 椎体成形术 体积 

分 类 号：R687.3[医药卫生—骨科学]