当前位置： SCI文献检索 > Orthopaedic Surgery期刊下所有文献 > Relationship between the location of ligamentum flavum hypertrophy and its stress in finite element analysis.

Relationship between the location of ligamentum flavum hypertrophy and its stress in finite element analysis.

Abstract：

OBJECTIVE:To quantitatively describe the stress of the ligamentum flavum (LF) using the finite element method and to compare the stress at different parts of the healthy LF. METHODS:Based on the high resolution computed tomography imaging data of a healthy 22-year-old man, three-dimensional nonlinear L4-5 lumbar finite element model (FEM) representing intact condition was developed. The LF, as the object of the present research, was incorporated into the spinal model in the form of solid three-dimensional structure. The model's validity is verified by comparing its biomechanical indices, such as range of motion and axial compression pressure displacement, with published results under specific loading conditions. To authenticate the accuracy of the solid LF, the lamina attachments, the central cross-section, and other anatomy indicators were compared with figures in the published literature. After the average and maximum von Mises stress on the surface of LF under various working conditions were measured using ANSYS and AutoCAD software, the surface stress difference in the LF between the ventral and dorsal sides as well as the lateral and lamina parts were determined. RESULTS:The FEM predicted a similar tendency for biomechanical indices as shown in previous studies. The lamina attachments, the central cross-section, and the height as well as the width of the LF in the healthy FEM were in accordance with published results. In the healthy model, the average and maximum von Mises stress in the shallow layer of the LF were, respectively, 1.40, 2.28, 1.76, 1.48, 1.38 and 1.79, 2.41, 1.46, 1.42, 1.71 times that in the deep layer under a compressive preload of 500 N incorporated with flexion, extension, and lateral and rotational moments (10 Nm). The most conspicuous difference in surface stress was observed with the flexion motion, with a nearly 241% difference in the maximum stress and a 228% difference in the average stress compared to those in other states. As far as the whole dorsal side of the LF was concerned, the maximum surface stress was almost all concentrated in the dorsal neighboring facet joint portion. In addition, the maximum and average stress were, respectively, 77%, 72%, 15%, 11%, 71% and 153%, 39%, 54%, 200%, 212% higher in the lateral part than in the lamina part. CONCLUSION:Based on the predisposition of LF hypertrophy in the human spine and the stress distribution of this study, the positive correlation between LF hypertrophy and its stress was confirmed.

journal_name

Orthop Surg

journal_title

Orthopaedic surgery

authors

Peng YX,Zheng ZY,Wang Md WG,Liu L,Chen Md F,Xu Md HT,Zhang ZM

doi

10.1111/os.12675

subject

Has Abstract

pub_date

2020-06-01 00:00:00

pages

974-982

issue

eissn

1757-7853

issn

1757-7861

journal_volume

pub_type

杂志文章

在线工具

Relationship between the location of ligamentum flavum hypertrophy and its stress in finite element analysis.