Prosthetic spinal discs

Details Prosthetic spinal discs Prosthetic spinal discs

2007-12-18

2007-12-18

Sweet, Thomas J (Department: 3738)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

C623S017160, C267S166100, C267S168000, C267S180000

Reexamination Certificate

active

11027728

ABSTRACT:
A prosthetic spinal disc uses a stiff spring or springs for resiliency between two plates that attach to adjacent vertebrae. When the disc has multiple springs, they may be adjacent, concentric or nested. Multiple springs may be spaced around the periphery of the plates. A foil metal bellows may surround the plates to prevent material from entering or exiting the space between the plates. Alternatively, the ends of the spring(s) may be machined with spikes to engage the vertebrae directly without plates.

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