Insert for nucleus implant
AssigneeDePuy Spine, Inc.
InventorsBrett R. Zarda, Michael J. O'Neil, Mark T. Hall
Life of this patent
Estimating the term…
Abstract
Methods and devices are provided for replacing a nucleus of a spinal disc, and in particular for preventing nucleus disc replacement expulsion. The nucleus of a spinal disc can be removed from the annulus by forming a small opening in the annulus. Once the nucleus is removed, one or more insert devices can be implanted within the annulus of a spinal disc and they can be mated to one or both endplates of the adjacent vertebrae. The insert(s) is configured to interact with a nucleus disc replacement implant to prevent expulsion of the implant from the annulus.
Claims11
A vertebral body insert system, comprising:
- a coiled insert body having bone-engaging terminal ends configured to engage bone to maintain the insert body in a substantially fixed position relative to the bone, and a mating portion having a sidewall with a plurality of pores formed therein, the mating portion being adapted to mate with a nucleus implant, and the mating portion being sized and shaped for positioning within an annular space defined by an annulus of a spinal disc such that the mating portion has a size that is less than a size of the annular space;
- and
- a nucleus disc replacement implant configured to be injected into an annulus of a spinal disc and to surround the mating portion and extend into the plurality of pores in the mating portion such that the coiled insert body is configured to retain the nucleus disc replacement member within the annulus.
A vertebral body insert system, comprising:
- a coiled insert body having bone-engaging terminal ends configured to engage adjacent vertebrae to maintain the insert body in a substantially fixed position relative to the vertebrae, and a mating portion having a sidewall with a plurality of pores formed therein, the mating portion being adapted to mate with a nucleus implant, and the mating portion being sized and shaped for positioning within an annular space defined by an annulus of a spinal disc such that the mating portion has a size that is less than a size of the annular space, wherein the mating portion is adapted to compress and expand to allow adjacent vertebrae to move relative to one another;
- and
- a nucleus disc replacement implant configured to be injected into an annulus of a spinal. disc and to surround the mating portion and extend into the plurality of pores in the mating portion such that the coiled insert body is configured to retain the nucleus disc replacement member within the annulus.
Dependencies are inferred from the claim text.