Spinal cage having deployable member

• US 8,100,972 B1
• Filed: 02/10/2009
• Issued: 01/24/2012
• 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, Lab, Eric A., Hartzell, Bret Everette, Sclafani, Adam C.
• Primary Examiner(s): Woodall, Nicholas
• Application Number:
  US12/368,888
• Time in Patent Office: 1,078 Days
• Field of Search: 623 1711- 1716, 606/246
• US Class Current: 623/17.11
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• 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 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• 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 2002/30484 Mechanically expandable devices located on the first prosthetic part for locking into or onto the second prosthetic part
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30523 by means of meshing gear teeth
• CPC Class Codes: A61F 2002/30525 Worm gears
• CPC Class Codes: A61F 2002/30579 with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30616 Sets comprising a plurality of prosthetic parts of different sizes or orientations
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/4629 connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00131 : Tantalum or Ta-based alloys
• 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 flat blade; and

a shaft attached to or integral with said blade, said shaft having an axis of rotation, said shaft having a dimension perpendicular to said axis of rotation which is less than a corresponding radial dimension of said blade, at least a portion of said shaft being cylindrical, said blade disposed in a plane that is perpendicular to said axis of rotation;

wherein said 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 shaft;

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

wherein said 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, wherein said second pair of flat surfaces are at said second end of said shaft.

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

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

5. 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.

6. A spin-plate, comprising:

a shaft, said shaft having an axis of rotation;

a flat blade, said blade being attached to or integral with said shaft, said blade disposed in a plane that is perpendicular to said axis of rotation, said 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.

7. The spin-plate of claim 6, wherein said disc outer edge surface is tapered in a direction away from said blade.

8. The spin-plate of claim 6, wherein two of said local radial peaks have respective radial dimensions that are different from each other.