A finite element analysis of sacroiliac joint displacements and ligament strains in response to three manipulations

BMC Musculoskeletal Disorders

Shaoqun Zhang¹  Liqing Liao¹  Kai Wu¹  Zhun Xu¹  Dan Li¹  Ziyu Feng¹  Yikai Li¹ 

[1] School of Traditional Chinese Medicine, Southern Medical University;

关键词: Manipulation;    Sacroiliac joint;    Displacement;    Ligament strain;    Finite element analysis;   

DOI  :  10.1186/s12891-020-03735-y

来源: DOAJ

【 摘 要 】

Abstract Background Clinical studies have found that manipulations have a good clinical effect on sacroiliac joint (SIJ) pain without specific causes. However, the specific mechanisms underlying the effect of manipulations are still unclear. The purpose of this study was to investigate the effects of three common manipulations on the stresses and displacements of the normal SIJ and the strains of the surrounding ligaments. Methods A three-dimensional finite element model of the pelvis-femur was developed. The manipulations of hip and knee flexion (MHKF), oblique pulling (MOP), and lower limb hyperextension (MLLH) were simulated. The stresses and displacements of the SIJ and the strains of the surrounding ligaments were analyzed during the three manipulations. Results MOP produced the highest stress on the left SIJ, at 6.6 MPa, while MHKF produced the lowest stress on the right SIJ, at 1.5 MPa. The displacements of the SIJ were all less than 1 mm during the three manipulations. The three manipulations caused different degrees of ligament strain around the SIJ, and MOP produced the greatest straining of the ligaments. Conclusion The three manipulations all produced small displacements of the SIJ and different degrees of ligament strains, which might be the mechanism through which they relieve SIJ pain. MOP produced the largest displacement and the greatest ligament strains.

【 授权许可】

Unknown