Finite element analysis of wedge and biconcave deformity in four different height restoration after augmentation of osteoporotic vertebral compression fractures

Abstract Purpose Biomechanical comparison of wedge and biconcave deformity different height restoration after augmentation osteoporotic vertebral compression fractures was analyzed by three-dimensional finite element analysis (FEA). Methods Three-dimensional model (FEM) T11-L2 segment constructed from CT scan elderly osteoporosis patient. The von Mises stresses vertebrae, intervertebral disc, facet joints, displacement, range motion (ROM) were compared at four heights (Genant 0–3 grade) T12 augmentation. Results In deformity, the stress decreased as in neutral position, flexion, extension, left axial rotation, whereas increased sharply bending Genant 0; L1 L2 all positions excluding flexion L2, T11 right rotation 0. No significant changes deformity. T11-T12, T12-L1, L1-L2 disc gradually or under other fracture, no change fracture. utmost overall joint is 3, there same position displacement ROM fracture had ups downs, while a decline extension Conclusions to 0 affects stress, which may increase risk restored not