No abstract

Compliant nucleus replacement using inflation pressures of 20 to 40 psi resulted in restoration of intact mechanics. Mechanical function was dependent on the volume of implant injected into the nucleus cavity.

Axial loading, rotation and bending were applied to human cadaveric lumbar segments to investigate changes in disc mechanics with denucleation and incremental delivery of a novel hydrogel nucleus replacement implant. Changes in disc height, range of motion, neutral zone, hysteresis and stiffness were examined.