Expandable Intervertebral Prosthesis Device for Posterior Implantation and Related Method Thereof
AssigneesUniversity of Virginia Patent Foundation, Kyphon Inc.
InventorsVincent Arlet, Christopher U. Phan
Life of this patent
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Abstract
A method and device for the insertion of a vertebral cage that may be done through a posterior approach that is minimally traumatic and does not require retraction of the spinal cord, dural sac or spinal nerves. The insertion of the cage may therefore be parallel to the spinal cord and the cage will be rotated ninety degrees (or as desired or required) in the vertebral body defect or as applicable to achieve its proper positioning before expansion.
Claims31
An intervertebral prosthesis device for posterior implantation between adjacent vertebrae of a subject, the device comprising:
- a) a cage body, said cage body having a lower end and an upper end defining a vertical height there between;
- said cage body having a transverse width and transverse length;
- said cage body being flexible and expandable, wherein said cage body being adapted to:
- change from a non-deployed state defining the vertical height being in a non-deployed vertical height (NVH) and expanded to a deployed state when filled with a filler material defining the vertical height being in a deployed vertical height (DVH), wherein said non-deployed vertical height cage body is less than or equal to the transverse height or transverse length of said cage body, and
- b) a driver element in communication with said cage body adapted to:
- insert said cage from the posterior of a subject and rotate said cage between the adjacent vertebrae, and
- expand said cage body with the filler material;
- and
- said cage body comprises a flexible chamber, wherein said flexible chamber comprises a telescopic-like structure.
A method for implanting an intervertebral prosthesis device between adjacent vertebrae from the posterior of a subject, sad method comprising:
- inserting a cage body from the posterior of the subject into space defined between the adjacent vertebrae;
- rotating said cage body between the adjacent vertebrae, and
- expanding said cage body with the filler material to fill a space defined between the adjacent vertebrae, and
- wherein said cage body comprises a flexible chamber, wherein said flexible chamber comprises a telescopic-like structure.
Dependencies are inferred from the claim text.