Spinal Cage Having Deployable Member

• US 20170095352A1
• Filed: 12/19/2016
• Published: 04/06/2017
• Est. Priority Date: 07/02/2007
• Status: Active Grant

• Current Assignee: Theken Spine LLC (Orthofix Medical Inc.)
• Original Assignee: Theken Spine LLC (Orthofix Medical Inc.)
• Inventors: Bruffey, James, Hartzell, Bret E.
• Granted Patent: US 10,342,674 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455
• CPC Class Codes: A61F 2/4465 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/2817 Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30032 differing in absorbability or resorbability, i.e. in absorption or resorption time
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30365 with additional means for limiting said rotation
• CPC Class Codes: A61F 2002/30367 with additional means for preventing said rotation
• CPC Class Codes: A61F 2002/30433 using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
• CPC Class Codes: A61F 2002/30482 using a locking cam
• CPC Class Codes: A61F 2002/30492 using a locking pin
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30522 releasable, e.g. using a releasable ratchet
• CPC Class Codes: A61F 2002/30523 by means of meshing gear teeth
• CPC Class Codes: A61F 2002/30525 Worm gears
• CPC Class Codes: A61F 2002/3054 about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
• CPC Class Codes: A61F 2002/30579 with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30593 : hollow
• CPC Class Codes: A61F 2002/30607 : Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
• CPC Class Codes: A61F 2002/30616 : Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30774 : internally-threaded
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30789 : perpendicular with respect to each other
• CPC Class Codes: A61F 2002/30825 : arcuate
• CPC Class Codes: A61F 2002/30828 : parallel
• CPC Class Codes: A61F 2002/30904 : serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/4627 : with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4628 : with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00293 : containing a phosphorus-containing compound, e.g. apatite
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

A spinal cage with a wall extending in a longitudinal direction defining an interior space is disclosed. There is also provided a deployable element in movable relation to the spinal cage.

Claims

1. A spin-plate, comprising:

a first blade having a first portion, said first portion of said first blade having a proximal end and a distal end; and

an elongated shaft, wherein said proximal end of said first blade is coupled to said elongated shaft at a first position and said distal end of said first blade is spaced away from said elongated shaft in a first radial direction, said elongated shaft having an axis of rotation, at least a portion of said elongated shaft being cylindrical, said first blade disposed in a plane at said first position that is transverse to said axis of rotation;

wherein said elongated shaft comprises a first end and a second end and an external circumferential surface and at least a first pair of flat surfaces parallel to said axis of rotation, wherein said pair of flat surfaces are disposed on said external circumferential surface on said first end of said elongated shaft;

wherein said spin-plate is sized to fit inside a spinal cage;

wherein said elongated shaft further comprises a second pair of flat surfaces; and

wherein said first pair of flat surfaces are substantially parallel to one another and define a first width therebetween and said second pair of flat surfaces are substantially parallel to one another and define a second width therebetween, wherein said first width and said second width are unequal.

2. The spin-plate of claim 1 further comprising a second blade positioned at a second position along said elongated shaft, wherein said second position is different from said first position.

3. The spin-plate of claim 1 wherein said first blade includes a leading edge and a trailing edge between said proximal end and said distal end.

4. The spin-plate of claim 1 wherein said first blade further comprises an opposing second portion substantially projecting opposite from said first portion, said opposing second portion having a proximal end adjacent said elongated shaft and a distal end spaced away from said elongated shaft in a second radial direction opposite said first radial direction thereby creating a terminal length between said distal end of said first portion of said first blade and said distal end of said opposing second portion of said first blade.

5. The spin-plate of claim 1 wherein said second pair of flat surfaces is at said second end of said elongated shaft.

6. The spin-plate of claim 1 further comprising a polygonal recess in one of said first or second ends of said elongated shaft.

7. A kit comprising the spin-plate of claim 1, and a bone screw, and a spinal cage, wherein said spinal cage is suitable to be implanted in a patient alone, or with said spin-plate assembled to said spinal cage, or with said bone screw, or with both said spin-plate assembled to said spinal cage and said bone screw.

8. The spin-plate of claim 1 further comprising a spinal cage, said spin-plate engageable with said spinal cage and rotatable with respect to said spinal cage, wherein when said spin-plate is in an undeployed position said distal end of said first blade does not extend beyond an envelope of said spinal cage in a radial direction transverse to said axis of rotation of said elongated shaft, and when said spin-plate is in a deployed position said distal end of said first blade extends beyond said envelope of said spinal cage in said radial direction.

9. The spin-plate of claim 1, wherein said second pair of flat surfaces is substantially parallel to said axis of rotation.

10. The spin-plate of claim 1, wherein said first pair of flat surfaces and said second pair of flat surfaces are substantially parallel to one another.

11. A spin-plate, comprising:

a shaft, said shaft having an axis of rotation;

one or more flat blades, at least one blade projecting outwardly from said shaft in one or more radial directions, said at least one blade disposed in a plane that is transverse to said axis of rotation, said at least one blade having in at least some places a greater radial dimension than said shaft; and

a disc, said disc being attached to or integral with said shaft, said disc having in at least some places a greater radial dimension than said shaft;

wherein said disc has an outer edge surface that is tapered with respect to said axis of rotation; and

wherein said disc has a perimeter with at least two local radial peaks, wherein said local radial peaks are at angular locations, as measured with respect to rotation about said axis of rotation, that are non-uniformly distributed.

12. The spin-plate of claim 11 wherein said disc outer edge surface is tapered in a direction away from said at least one blade.

13. The spin-plate of claim 11 wherein two of said local radial peaks have respective radial dimensions that are different from each other.

14. The spin-plate of claim 11 wherein said at least one blade is symmetrical about said shaft.

15. The spin-plate of claim 11 wherein said at least one blade includes at least one leading edge.

16. The spin-plate of claim 15 wherein said at least one blade includes two said leading edges.

17. The spin-plate of claim 11 wherein said at least on blade projects in one of said one or more radial directions to engage a vertebra.

18. The spin-plate of claim 11 wherein said at least one blade projects in two of said one or more radial directions to engage adjacent vertebra.