Stress-strain distribution in intact L4-L5 vertebrae under the influence of physiological movements: A finite element (FE) investigation. Issue 1 (November 2021)

• Record Type: Journal Article
• Authors: Sanjay, Devismita; Kumar, Neeraj; Chanda, Souptick
• Is Part Of: IOP conference series. Volume 1206:Issue 1(2021)
• Publication Date: 2021-11
• Subjects: Lumbar spine -- finite element analysis -- ligaments -- stress development -- strain -- range of motion -- functional spinal unit -- intervertebral disc; Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/1206/1/012024
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: This study is aimed at finding the stress and strain distribution in functional spinal unit of L4-L5 occurring due to physiological body movements under five loading conditions, namely compression, flexion, extension, lateral bending and torsion. To this purpose, 3D finite element (FE) model has been generated using 4-noded unstructured tetrahedral elements considered both for bones and intervertebral disc, and 1D tension-only spring elements for ligaments. The analyses were performed for a compression load of 500 N and for other load cases, a moment of 10 N-m along with a preload of 500 N was applied. The model was validated against in-vitro experimental data obtained from literature and FE analysis data for a range of motion (RoM) corresponding to various loading conditions. The highest stress was predicted in the case of torsion though the angular deformation was highest in case of flexion.