Design and manufacture of a novel dynamic spinal implant

Abstract

Posterior dynamic stabilization implants are widely used to reduce loading of the intervertebral disc and facet joints, for treatment of chronic lower back pain and limiting degeneration of adjacent segment with load sharing. Posterior dynamic stabilization implants limit abnormal motion at the segment, while preserving the motion within normal physiological limits. Load sharing characteristics and motion limits of the implant depend on strength and flexibility. Parameters that affect strength and flexibility are investigated to obtain both high strength and flexibility. A non-linear large deflection solution in FEM is used for every design model, to determine deflection amounts and force at magnitudes.