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1. WO2020197830 - HINGE-LINK SPINAL CORRECTION DEVICE AND METHOD

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[ EN ]

WHAT IS CLAIMED IS:

1. A device for spinal correction comprising:

a stabilizer assembly comprising:

a hinge comprising:

a first rod-bearing leaf;

a second rod-bearing leaf rotatably coupled to the first rod-bearing leaf to provide coronal or sagittal freedom of movement, or both, of the stabilizer assembly;

a locking mechanism to lock the first rod-bearing leaf and the second rod bearing leaf at a desired angle;

a first stabilizing rod coupled to the first rod-bearing leaf;

a second stabilizing rod coupled to the second rod-bearing leaf; and

a plurality of monoaxial or polyaxial links, wherein each monoaxial or polyaxial link is movably coupled to the first stabilizing rod or to the second stabilizing rod and is movably couplable to a first spinal rod fixed to a spine or to a second spinal rod fixed to the spine;

wherein the stabilizer assembly is couplable to the first spinal rod or to the second spinal rod to stabilize the spine to prevent compression, distraction, or translation of the spinal cord during a spinal correction.

2. The device of claim 1, wherein the locking mechanism to lock the first rod bearing leaf and the second rod-bearing leaf at the desired angle comprises one or more screws.

3. The device of claim 1, wherein the first stabilizing rod is coupled to the first rod bearing leaf with a first threaded portion of the first stabilizing rod.

4. The device of claim 1, wherein the second stabilizing rod is coupled to the second rod-bearing leaf with a second threaded portion of the second stabilizing rod.

5. The device of claim 1, wherein each monoaxial or polyaxial link is movably coupled to the first stabilizing rod or to the second stabilizing rod with one or more adjustment nuts or one or more locking pins.

6. The device of claim 1, wherein each polyaxial link is movable to and lockable at a position on the first stabilizing rod or the second stabilizing rod and is movable to and lockable at an angle to the first stabilizing rod or the second stabilizing rod with two or more adjustment nuts.

7. The device of claim 1, wherein each monoaxial or polyaxial link is movably couplable to the first spinal rod or to the second spinal rod at one or more components, each comprising a recess shaped to receive the first spinal rod or to the second spinal rod, and lockable in position with one or more screws.

8. The device of claim 1, wherein the first stabilizing rod is rotatably coupled to the first rod-bearing leaf to provide coronal or sagittal freedom of movement, or both, of the first stabilizing rod or the second stabilizing rod is rotatably coupled to the second rod bearing leaf to provide coronal or sagittal freedom of movement, or both, of the second stabilizing rod;

and wherein the first stabilizing rod has a locking mechanism to lock it at a desired position or the second stabilizing rod has a locking mechanism to lock it at a desired position.

9. The device of claim 1, wherein the first stabilizing rod or the second stabilizing rod is threaded and adjustment nuts are mounted on the first stabilizing rod or the second stabilizing rod to provide longitudinal freedom of movement or locking of one or more of the plurality of monoaxial or polyaxial links on the first stabilizing rod or the second stabilizing rod.

10. A kit comprising:

a stabilizer assembly comprising:

a hinge comprising:

a first rod-bearing leaf;

a second rod-bearing leaf rotatably coupled to the first rod-bearing leaf to provide coronal or sagittal freedom of movement, or both, of the stabilizer assembly;

a locking mechanism to lock the first rod-bearing leaf and the second rod bearing leaf at a desired angle;

a first stabilizing rod coupled to the first rod-bearing leaf;

a second stabilizing rod coupled to the second rod-bearing leaf; and

a plurality of monoaxial or polyaxial links, wherein each monoaxial or polyaxial link is movably coupled to the first stabilizing rod or to the second stabilizing rod and is movably couplable to a first spinal rod fixed to a spine or to a second spinal rod fixed to the spine;

wherein the stabilizer assembly is couplable to the first spinal rod or to the second spinal rod to stabilize the spine to prevent compression, distraction, or translation of the spinal cord during a spinal correction.

11. The kit of claim 10, wherein the first stabilizing rod is rotatably coupled to the first rod-bearing leaf to provide coronal or sagittal freedom of movement, or both, of the first stabilizing rod or the second stabilizing rod is rotatably coupled to the second rod bearing leaf to provide coronal or sagittal freedom of movement, or both, of the second stabilizing rod;

and wherein the first stabilizing rod has a locking mechanism to lock it at a desired position or the second stabilizing rod has a locking mechanism to lock it at a desired position.

12. The kit of claim 10, wherein the first stabilizing rod or the second stabilizing rod is threaded and adjustment nuts are mounted on the first stabilizing rod or the second stabilizing rod to provide longitudinal freedom of movement or locking of one or more of the plurality of monoaxial or polyaxial links on the first stabilizing rod or the second stabilizing rod.

13. A method of stabilizing a spine comprising:

providing a patient in need of stabilization of a spine, wherein a plurality of spinal rods have been fixed to the spine;

coupling a stabilizer assembly of a device for spinal correction to at least one of the plurality of spinal rods, wherein the stabilizer assembly comprises:

a hinge comprising:

a first rod-bearing leaf;

a second rod-bearing leaf rotatably coupled to the first rod-bearing leaf to provide coronal or sagittal freedom of movement, or both, of the stabilizer assembly; and

a locking mechanism to lock the first rod-bearing leaf and the second rod-bearing leaf at a desired angle;

a first stabilizing rod coupled to the first rod-bearing leaf; a second stabilizing rod coupled to the second rod-bearing leaf; and a plurality of monoaxial or polyaxial links, wherein each monoaxial or polyaxial link is movably coupled to the first stabilizing rod or to the second

stabilizing rod and is movably coupled to a first spinal rod fixed to a spine or to a second spinal rod fixed to the spine; and

stabilizing the spine at a desired spinal configuration;

wherein the stabilizer assembly is couplable to the first spinal rod or to the second spinal rod to stabilize the spine to prevent compression, distraction, or translation of the spinal cord during a spinal correction.

14. The method of claim 13, wherein the locking mechanism to lock the first rod bearing leaf and the second rod-bearing leaf at the desired angle comprises one or more screws.

15. The method of claim 13, wherein the first stabilizing rod is coupled to the first rod-bearing leaf with a first threaded portion of the first stabilizing rod.

16. The method of claim 13, wherein the second stabilizing rod is coupled to the second rod-bearing leaf with a second threaded portion of the second stabilizing rod.

17. The method of claim 13, wherein each monoaxial or polyaxial link is movably coupled to the first stabilizing rod or to the second stabilizing rod with one or more adjustment nuts or one or more locking pins.

18. The method of claim 13, wherein each polyaxial link is movable to and lockable at a position on the first stabilizing rod or the second stabilizing rod and is movable to and lockable at an angle to the first stabilizing rod or the second stabilizing rod with two or more adjustment nuts.

19. The method of claim 13, wherein each monoaxial or polyaxial link is movably couplable to the first spinal rod or to the second spinal rod at one or more components, each comprising a recess shaped to receive the first spinal rod or to the second spinal rod, and lockable in position with one or more screws.

20. The method of claim 13, wherein the first stabilizing rod is rotatably coupled to the first rod-bearing leaf to provide coronal or sagittal freedom of movement, or both, of the first stabilizing rod or the second stabilizing rod is rotatably coupled to the second rod-bearing leaf to provide coronal or sagittal freedom of movement, or both, of the second stabilizing rod; and wherein the first stabilizing rod has a locking mechanism to lock it at a desired position or the second stabilizing rod has a locking mechanism to lock it at a desired position.

21. The method of claim 13, wherein the first stabilizing rod or the second stabilizing rod is threaded and adjustment nuts are mounted on the first stabilizing rod or the second stabilizing rod to provide longitudinal freedom of movement or locking of one or more of the plurality of monoaxial or polyaxial links on the first stabilizing rod or the second stabilizing rod.

22. The method of claim 13, further comprising coupling the stabilizer assembly to at least one of the plurality of spinal rods oriented to allow the hinge to have coronal freedom of movement, sagittal freedom of movement, or a combination of coronal and sagittal freedom of movement.