中国临床解剖学杂志 ›› 2018, Vol. 36 ›› Issue (6): 674-677.doi: 10.13418/j.issn.1001-165x.2018.06.015

• 临床生物力学 • 上一篇    下一篇

机翼型Ni-Ti合金固定峡部裂对椎间盘的影响

王健1, 朱立新2, 杨慧1, 古钦文1, 彭道琥1, 李森1   

  1. 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
  • 收稿日期:2018-05-08 出版日期:2018-11-25 发布日期:2018-12-29
  • 通讯作者: 李森,主任医师, E-mail:jht187@163.com
  • 作者简介:王健(1987-),主治医师,主要从事脊柱疾病与骨肿瘤的基础与临床研究,E-mail:wjian8723@163.com
  • 基金资助:

    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

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

WANG Jian1, ZHU Li-xin2,YANG Hui1,GU Qin-wen1,PENG Dao-hu1,LI Sen1   

  1. 1. Department of Orthopedic,Hospital(T.C.M) Affiliated to Southwest Medical University, Luzhou 646000,China;2. Department of Orthopedic,Zhujiang Hospital,Southern Medical University,Guangzhou 510282,China
  • Received:2018-05-08 Online:2018-11-25 Published:2018-12-29

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。

关键词:  , Ni-Ti合金,  峡部裂,  椎间盘,  有限元

Abstract:

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.

Key words: Ni-Ti alloy; Spondylolysis,  Intervertebral disc; Finite element