Nucleus Arthroplasty

Nucleus Arthroplasty: Summary

Nucleus Arthroplasty is a surgical procedure, which uses a device known as a Prosthetic Disc Nucleus (PDN) to replace the inner nucleus of a mildly desiccated, degenerated disc. If the patient has a mild loss of disc height and the outer ring of the disc annulus is still intact, Nucleus Arthroplasty is possible. If the bone structure of the vertebrate bodies is not intact and the facet joints show signs of degeneration, Nucleus Arthroplastyt is not advised.

Two devices, Hydraflex® and the NeuDisk®, are based on a hydrogel composition Hydrogel has biomechanical properties similar to the nucleus. Since its inception, several design changes and modifications of the hydrogel composition have been made to improve the biomechanical properties of the Hydraflex.


Other Nucleus Arthroplasty technologies are also under development by companies like Raymedica PDN, Newcleus, Howmedica Osteonic, Disc Dynamics, Cryolife, Disc Augmentation Technologies, and Replication Medical. The technologies include new devices and injectable compounds, which harden after injection. These technologies have yet to be fully tested and it remains to be seen, if they will be safe and effective over time.


Nucleus Arthroplasty