Spinal stabilization apparatus
OwnerJoseph D Mareshinventor
Life of this patent
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Abstract
A dynamic spinal stabilization apparatus may be implanted and secured to at least two vertebrae. The spinal stabilization apparatus may promote and enforce a relatively natural motion of spine flexion of one or more regions of the spine. In one embodiment, the spinal stabilization apparatus may be secured to a plurality of vertebrae and biasing the entire spine to a fully normal curvature. The spinal stabilization apparatus may dynamically stabilize the spine while preserving spinal motion. In other embodiments, the spinal stabilization apparatus may be utilized for spine fusion treatments and may provide load sharing either as an enhancement to a fusion device or as a motion-preserving non-fusion apparatus.
Claims10
A spinal stabilization apparatus, comprising:
- a) at least two anchor assemblies securable to vertebrae of the spine;
- b) a cable sub-assembly removably connected to said at least two anchor assemblies, wherein said cable sub-assembly includes a plurality of bushings threaded in series on a cable, said plurality of bushings disposed between end bushings fixedly secured to opposite distal ends of said cable;
- c) each said anchor assemblies including a socket fixed to an upper end of a pedicle screw, said socket including axially spaced apart end walls transverse to a longitudinal axis of said socket, said anchor assembly further including a cap member separable from said socket;
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- d) biasing members threaded on said cable, said biasing members comprising compression springs disposed between said end walls of a respective said socket.
A spinal stabilization apparatus, comprising:
- a) at least two anchor assemblies securable to vertebrae of the spine;
- b) a cable sub-assembly removably connected to said at least two anchor assemblies, wherein said cable sub-assembly includes a plurality of bushings threaded in series on a cable, said plurality of bushings disposed between end bushings fixedly secured to opposite distal ends of said cable;
- c) each said anchor assemblies including a socket fixed to an upper end of a pedicle screw, said socket defining a cavity having a longitudinal axis concentric with said cable, said socket including axially spaced apart end walls transverse to said longitudinal axis of said cavity, said anchor assembly further including a cap member separable from said socket;
- and
- d) biasing members threaded on said cable, said biasing members disposed between said end walls of a respective said socket.
A spinal stabilization apparatus, comprising:
- a) at least two anchor assemblies securable to vertebrae of the spine;
- b) a cable sub-assembly removably connected to said at least two anchor assemblies, wherein said cable sub-assembly includes a plurality of bushings threaded in series on a cable, said plurality of bushings disposed between end bushings fixedly secured to opposite distal ends of said cable;
- c) each said anchor assemblies including a socket fixed to an upper end of a pedicle screw, said socket including axially spaced apart end walls transverse to a longitudinal axis of said socket, said anchor assembly further including a cap member separable from said socket;
- and
- d) helical compression springs threaded on said cable, said compression springs disposed between said end walls of a respective said socket.
Dependencies are inferred from the claim text.