杂交术治疗多节段颈椎病后生物力学有限元分析

被引:6
作者
郑羽晨
闵少雄
张力
张辉
曹延林
段扬
靳安民
机构
[1] 南方医科大学附属珠江医院骨科中心
关键词
颈椎人工椎间盘; 杂交术式; Mobi-C; 有限元分析;
D O I
10.13418/j.issn.1001-165x.2012.02.032
中图分类号
R687.3 [骨骼手术];
学科分类号
100220 [骨科学];
摘要
目的有限元分析法探讨应用Mobi-C假体的颈人工椎间盘置换(artificial cervical discreplacement,ACDR)联合椎间植骨融合术(Anterior cervical decompression and fusion,ACDF)治疗多节段颈椎病的生物力学特点。方法在已验证的下颈椎有限元模型基础上,对模型施加了头颅预载荷74 N及1.8 Nm纯力矩,模拟2组行C-ADR联合ACDF手术方式及1组行三节段ACDF手术方式,在各工况下分析术后2组杂交术式假体各部件的应力特点和3组重建模型各节段关节突关节的应力改变。结果⑴杂交术式重建模型中Mobi-C假体上终板应力均高于下终板应力;⑵终板应力分布主要集中在终板中央偏后,最高值分别为M1组79.4Mpa,M2组为70.9Mpa;内衬应力分布集中于中央两翼,最高值分别为M1组11.6Mpa,M2组为14.4Mpa;⑶三处理组与正常组相比,行C-ADR节段的关节突关节应力增加;行ACDF节段的关节突关节应力降低;而三节段融合组邻段关节突关节应力较正常组及杂交术式组明显增高。结论应用Mobi-C假体的杂交术式治疗多节段颈椎病,假体不易出现下沉,较多节段融合术式能更好的维持邻段关节突关节应力。
引用
收藏
页码:221 / 224
页数:4
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