机翼型Ni-Ti合金固定峡部裂对椎间盘的影响  

Impact of fixiation spondylolysis using the aerofoil–shaped Ni-Ti alloy on the intervertebral disc

作　　者：王健 朱立新[2] 杨慧 古钦文 彭道琥 李森 WANG Jian;ZHU Li-xin;YANG Hui;GU Qin-wen;PENG Dao-hu;LI Sen(Department of Orthopedic,Hospital(T.C.M)Affiliated to Southwest Medical University,Luzhou 646000, China;Department of Orthopedic,Zhujiang Hospital,Southern Medical University,Guangzhou 510282, China)

机构地区：[1]西南医科大学附属中医医院骨伤科,泸州646000 [2]南方医科大学珠江医院骨科中心,广州510000

出　　处：《中国临床解剖学杂志》2018年第6期674-677,共4页Chinese Journal of Clinical Anatomy

基　　金：四川省卫计委科研项目(18PJ466);西南医科大学-西南医科大学附属中医医院联合培育项目:中西医结合骨病学创新团队

摘　　要：目的在自制机翼型Ni-Ti合金固定器基础之上,建立腰椎峡部裂内固定的有限元模型,分析其对椎间盘的影响。方法CT数据建立腰椎峡部裂模型,数字装配固定器,测算人体各工况下椎间盘应力峰值及分布。结果在前屈、后伸、左侧屈和左旋转工况下,患椎间盘的最大应力值分别增加到105%、102%、101%和111%,在使用机翼型Ni-Ti合金内固定技术重建后,患椎间盘最大应力值分别减少至67%、55%、88%和83%。结论机翼型Ni-Ti合金固定器构造特别,可有效减少同节段及相邻节段的椎间盘应力,防止椎间盘远期退变,具备良好的生物力学特性,有望进入临床应用,为腰椎峡部裂的治疗提供更多的选择。Objective Application of Ni-Ti alloy fixation(AEROFOIL FIXATION) in spondylolysis has been successful. The aim of this study was to analyze its impact on the intervertebral disc using the finite element model. Methods A three-dimensional non-linear finite element(FE) model of spondylolysis has been developed. Von Mises stresses and distributions of intervertebral disc were analyzed in flexion,extension, left lateral bending and left axial rotation. Results Under different conditions, the maximum stresses of affected disc were increased to 105%、102%、101% and 111%,respectively. After direct repair by AEROFOIL FIXATION technique, the affected disc stresses decreased to 67%, 55%, 88% and 83%,respectively. Conclusions AEROFOIL FIXATION, due to its reasonable structure and excellent biomechanical properties that can prevent the anterior degeneration intervertebral disc and, should be promoted in clinical application, providing another choice for the treatment of lumbar spondylolysis.

关 键 词：NI-TI合金 峡部裂 椎间盘 有限元 

分 类 号：R318.01[医药卫生—生物医学工程]