膝关节ACL断裂单髁置换生物力学特性的有限元分析
DOI:
作者:
作者单位:

1.上海理工大学;2.同济大学附属杨浦医院骨科

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金(11502146),上海市自然科学基金(15ZR1429600)


Finite Element Analysis of the Biomechanical Properties of Unicompartmental Knee Arthroplasty in ACL Fracture of the Knee Joint
Author:
Affiliation:

1.University of Shanghai for Science and Technology;2.Department of Orthopedics,Yang Pu Hospital Affiliated to Tong Ji University

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    目的 基于人体膝关节CT和MRI图像建立前交叉韧带(anterior cruciate ligament, ACL)断裂和正常膝关节三维实体模型,采用有限元方法探索研究ACL断裂膝关节在不同屈膝角度对植入假体生物力学性能的影响。方法 结合临床单髁置换手术方案植入第三代牛津单髁(Oxford Ⅲ)假体,其中胫骨假体后倾7°,建立膝关节屈曲0°、30°、60°、90°和120°单髁置换的三维有限元模型,在股骨中心点上施加1000 N压缩载荷,分析五种屈膝角度下股骨假体、半月板衬垫、胫骨假体的应力分布情况。结果 膝关节ACL断裂组与正常组在五种屈膝状态下的研究表明,半月板衬垫的Von Mises应力在ACL断裂组与正常组之间最大相差幅度为62.5%,在0°、30°、60°和120°屈膝状态下ACL断裂组最大应力值均大于正常组;股骨假体在ACL断裂30°时的最大应力值明显增加,其余四种屈膝状态应力的最大增值为60.81%;胫骨假体在五种屈膝状态下ACL断裂组最大应力值比正常组分别增加了19.07%、36.78%、25.69%、-4.38%、51.19%。当 ACL 断裂后,除屈膝90°外半月板衬垫和胫骨假体上的均布应力值均大于正常组,在屈膝30°和120°时对半月板衬垫的磨损较大。结论 膝关节ACL断裂单髁置换术的研究结果,可为临床膝关节ACL断裂单髁假体置换的手术方案和半月板假体的优化设计提供理论依据。

    Abstract:

    Objective To explore the biomechanical properties of the anterior cruciate ligament (ACL)fracture knee joint at different knee flexion angles,we reconstructed the ACL fracture and normal three-dimensional solid model of the knee joint based on CT and MRI images of human’s knee joints. Methods Combined with the Unicompartmental Knee Arthroplasty (UKA),we implant a Oxford III prosthesis and analyze them in finite element methods. We established the 3D finite element model for UKA at 0°, 30°, 60°, 90°, and 120° of knee flexion. The tibial prosthesis is inclined backward by 7°. 1000N compressive load is applied on the center of femur to analyze the stress distribution of femoral, meniscus, and tibial prosthesis under different knee flexion angles.Results The research of knee ACL fracture group and normal group in five knee flexion indicates that the Von Mises stress of the meniscus liner was statistically different between the ACL rupture group and the normal group. The maximum difference was 62.5%. At 0°,30°, 60°and 120° of knee flexion, the maximal stress in the ACL rupture group was significantly higher than that in the normal group; At 30° of knee flexion, the maximum stress the femoral prosthesis in the ACL rupture group increased significantly. The maximum increase in other four knee flexion states is 60.81%; Compared with the normal group in the five knee flexion states, the maximal stress of tibial prosthesis in the ACL fracture group is respectively increased by 19.07%、36.78%、25.69%、-4.38%、51.19%. In the ACL rupture group, the uniform stress on the meniscus liner and the tibial prosthesis are higher than that in the normal group except at 90° of knee flexion. Greater damage can be caused to the meniscus liner at 30° and 120° of knee flexion. Conclusions The results of the knee joint ACL fracture in UKA can provide a theoretical basis for the surgical design and the optimization of the meniscus prosthesis.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2018-08-08
  • 最后修改日期:2019-01-15
  • 录用日期:2019-01-28
  • 在线发布日期:
  • 出版日期: