A Finite Element Analysis of Sacroiliac Joint Ligaments in Response to Different Loading Conditions

Abstract

The sacroiliac ligaments function to constrain the SIJ and decrease stress across the SIJ for different load scenarios. Decreasing sacroiliac ligament stiffness leads to both increased joint motion and stress.

Biomechanical study of four kinds of percutaneous screw fixation in two types of unilateral sacroiliac joint dislocation: A finite element analysis

“…The FE model was validated using in vitro data and other simulation study results [23][24][25]. To maintain consistency, the sacral spinous processes in the model were removed and all nodes on the iliac bones lateral to the ventral and dorsal ligament complexes.…”

Ultimate stress and age-dependent deformation characteristics of the iliotibial tract

“…However, most approaches as the finite element method failed to integrate these structures due to missing data on their material properties (García et al, 2000;Majumder et al, 2007). A few groups created finite element models including ligaments and ligamentous material properties (Eichenseer et al, 2011;Liao and Belkoff, 1999;Phillips et al, 2007). Yet, these models are based on estimated material parameters or on parameters of other ligaments obtained from literature and on CT scans, which do not visualize the ligaments sufficiently.…”

Experimental Characterization and Finite Element Implementation of Soft Tissue Nonlinear Viscoelasticity

“…Nevertheless, both the integral (Eq, (1)) and the differential (Eq, (21)) formulations may be generalized to multiaxial stress states [33], Tendon and ligament anisotropy is rarely considered in whole joint simulations. Recent whole joint FE investigations, such as those of the cervical spine [46,47], the lumbar spine [48,49], the knee [50,51], the sacroiliac joint [52], and the pelvic joint [53] typically model these connective tissues as one-dimensional elastic spring or truss elements in order to reduce computational cost. Three-dimensional, continuum-based material models have been put forth in an attempt to more accurately represent connective tissue anisotropic nonlinear viscoelasticity [54][55][56], However, these continuum formulations require very complicated experimental characterization techniques owing to the relatively large number of required material coefficients and implementation of these anisotropic derivations into whole joint FE model has, to date, been shown to be largely intractable.…”