中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (28): 4529-4534.doi: 10.3969/j.issn.2095-4344.1340

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

新型后路寰枢椎板间融合器生物力学特征的有限元分析

邹小宝,马向阳,杨浩志,葛  苏,陈育岳,夏  虹,吴增晖   

  1. 中国人民解放军南部战区总医院骨科,广东省广州市  510010
  • 出版日期:2019-10-08 发布日期:2019-10-08
  • 通讯作者: 马向阳,教授,主任医师,博士生导师,博士后,中国人民解放军南部战区总医院骨科,广东省广州市 510010
  • 作者简介:邹小宝,男,1990年生,安徽省寿县人,汉族,2017年南方医科大学毕业,硕士,医师,主要从事脊柱外科方面的研究。
  • 基金资助:

    广东省科技计划项目(2015B020233013),项目负责人:马向阳|广州市科技计划项目(201803010046),项目负责人:马向阳

Finite element analysis of biomechanical properties of a novel posterior interlamina fusion cage

Zou Xiaobao, Ma Xiangyang, Yang Haozhi, Ge Su, Chen Yuyue, Xia Hong, Wu Zenghui   

  1. Department of Orthopedics, General Hospital of Southern Theater Command, Guangzhou 510010, Guangdong Province, China
  • Online:2019-10-08 Published:2019-10-08
  • Contact: Ma Xiangyang, MD, Professor, Chief physician, Doctoral supervisor, Department of Orthopedics, General Hospital of Southern Theater Command, Guangzhou 510010, Guangdong Province, China
  • About author:Zou Xiaobao, Master, Physician, Department of Orthopedics, General Hospital of Southern Theater Command, Guangzhou 510010, Guangdong Province, China
  • Supported by:

    the Science and Technology Department of Guangdong Province, No. 2015B020233013 (to MXY)| the Science and Technology Department of Guangzhou, No. 201803010046 (to MXY)

摘要:

文章快速阅读:



文题释义:
寰枢椎板间融合器:为直接固定在寰椎后弓与枢椎椎板之间的一种新型融合器,有别于传统椎间融合器的概念,虽其不具有传统椎间融合器的椎间支撑作用,但相对于以往研究较多的前路或后路寰枢椎侧块关节融合器及传统寰枢椎后路手术植骨融合方法,此融合器可配合广泛使用的后路钉棒内固定手术,置入操作简便,可集中植骨,增加植骨与寰椎后弓及枢椎椎板的接触应力,促进融合。
寰枢椎后路钉棒系统内固定:该技术为目前临床应用最为广泛的寰枢椎内固定技术,不仅具有置钉方式灵活、适用人群广、固定强度高、生物力学优良、并发症少等优势,而且具有一定的提拉复位能力,使得寰枢椎脱位的治疗效果、安全性、适用性和便利性得以明显提高。
 
摘要
背景:随着寰枢椎手术量的增加,寰枢椎植骨融合的问题也一直备受重视,无论寰枢椎前路或者后路融合器,虽然对寰枢椎融合器的研究从未停止,但由于手术技术难度、手术风险、设计不成熟等诸多原因,目前仍未有相关的寰枢椎融合器可应用于临床。后路寰枢椎板间融合器是一种可配合后路钉棒内固定系统使用的新型融合器类型,但其生物力学性能仍需进一步研究。
目的:通过建立寰枢椎板间融合器联合后路钉棒内固定系统的三维有限元模型,评估新型后路寰枢椎板间融合器的生物力学特性。
方法:通过CT扫描获取1名健康成年人枕骨、寰枢椎图像信息,应用有限元分析软件创建寰枢椎板间融合器联合后路钉棒内固定系统的三维有限元分析模型,分析不同运动状态下寰枢椎板间融合器的应力变化及应力云图。
结果与结论:①建立的有限元模型几何相似性好,包含206 745个单元及72 496个节点;②寰枢椎板间融合器的最大应力均集中在微型钛钉置入骨质部位,左右旋转工况下的最大应力值较其他工况下高;③后路钉棒系统应力均主要集中在螺钉的钉-骨交界处及钉棒连接处,最大的应力均产生在螺钉置入骨质部分的根部周围;④提示新型后路寰枢椎板间融合器的力学稳定性可,寰枢椎板间融合器是一种简单、安全的寰枢椎融合器类型,对后路钉棒系统应力无影响,值得进一步研究。

ORCID: 0000-0002-2101-1900(邹小宝)

关键词: 寰枢椎, 寰枢椎板间融合器, 后路内固定, 钉棒系统, 三维有限元模型, 数字化骨科, 有限元分析, 生物力学

Abstract:

BACKGROUND: With the increase of surgical amount in atlantoaxial spine, the problem of bone graft fusion has also been respected. Regardless of atlantoaxial anterior or posterior fusion cage, although the study of atlantoaxial fusion cage has never stopped, but because of the surgical technical difficulties, surgical risk, immature design, and many other reasons, there is still no related atlantoaxial fusion cage can be applied to clinic. Posterior atlantoaxial interlamina fusion cage is a new type that can be used with posterior screw-rod internal fixation system, but its biomechanical properties still need to be further studied.
OBJECTIVE: To evaluate the biomechanical characteristics of a new posterior atlantoaxial interlamina fusion cage by establishing a three-dimensional finite element model of the atlantoaxial interlamina fusion cage combined with posterior screw-rod internal fixation system.
METHODS: CT scan was used to obtain the image information of occipital and atlantoaxial of a healthy adult. Finite element analysis software was used to create a three-dimensional finite element analysis model of atlantoaxial interlaminar fusion cage combined with posterior screw-rod internal fixation system, and stress changes and stress nephogram of atlantoaxial interlaminar fusion cage under different motion states were analyzed.
RESULTS AND CONCLUSION: (1) The finite element model had good geometric similarity, including 206 745 elements and 72 496 nodes. (2) The maximum stress of atlantoaxial interlaminar fusion cage device was concentrated at the bone implant site of micro-titanium nail, and the maximum stress value under the condition of left and right rotation was higher than that under other conditions. (3) The stress of the posterior screw-rod system was mainly concentrated at the screw-bone junction and the screw-rod junction of the screw, and the maximum stress was generated around the root of the screw into the bone. (4) These results suggest that the mechanical stability of the new posterior atlantoaxial interlaminar fusion cage device is good, and it is a simple and safe type of atlantoaxial fusion cage device, which makes no influence on the stress of the posterior screw-rod system and is worthy of further investigation.

Key words: atlantoaxial, atlantoaxial interlaminar fusion cage, posterior internal fixation, screw rod system, three-dimensional finite element model, digital orthopedics, finite element analysis, biomechanics

中图分类号: