Functional spinal unit prosthetic

• US 20050055096A1
• Filed: 05/20/2004
• Published: 03/10/2005
• Est. Priority Date: 12/31/2002
• Status: Abandoned Application

• Current Assignee: Depuy Spine Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Spine Incorporated (Johnson & Johnson)
• Inventors: Serhan, Hassan A., Kwak, Seungkyu Daniel, Dunbar, William, Borgstrom, Amie, Slivka, Michael A., Hawkins, John R., Labrom, Robert, Dooris, Andrew
• Application Number:
  US10/850,280
• Publication Number:
  US 20050055096A1
• Time in Patent Office: Days
• US Class Current: 623/17.110
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 17/7011 Longitudinal element being non-straight, e.g. curved, angled or branched adjustable length longitudinal elements A61B17/7014; A61B17/7019 takes precedence, e.g. coil springs
• CPC Class Codes: A61B 17/7064 Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
• CPC Class Codes: A61F 2/08 Muscles; Tendons; Ligaments sutures A61B17/04
• CPC Class Codes: A61F 2/30 Joints
• CPC Class Codes: A61F 2/30742 Bellows or hose-like seals; Sealing membranes A61B17/8808 takes precedence; sealing membranes for retaining bone substitute A61F2/2846
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• CPC Class Codes: A61F 2/4405 for apophyseal or facet joints, i.e. between adjacent spinous or transverse processes devices implanted between spinous or transverse processes A61B17/7062
• 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 2/4425 made of articulated components
• CPC Class Codes: A61F 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2002/30014 differing in elasticity, stiffness or compressibility
• 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 2002/30224 cylindrical
• CPC Class Codes: A61F 2002/30242 spherical
• CPC Class Codes: A61F 2002/30383 made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
• CPC Class Codes: A61F 2002/30462 retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30553 for adjusting a position by translation along an axis
• CPC Class Codes: A61F 2002/30563 : having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
• CPC Class Codes: A61F 2002/30565 : having spring elements
• CPC Class Codes: A61F 2002/30578 : having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30649 : Ball-and-socket joints
• CPC Class Codes: A61F 2002/30662 : with rotation-limiting means
• CPC Class Codes: A61F 2002/30673 : Lubricating means, e.g. synovial pocket
• CPC Class Codes: A61F 2002/30682 : Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
• CPC Class Codes: A61F 2002/30772 : Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30774 : internally-threaded
• CPC Class Codes: A61F 2002/30777 : Oblong apertures
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/443 : having two transversal endplates and at least one intermediate component
• CPC Class Codes: A61F 2210/0004 : bioabsorbable
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2220/0075 : sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2230/0071 : spherical
• CPC Class Codes: A61F 2250/0008 : for adjusting a position by translation along an axis or two perpendicular axes
• CPC Class Codes: A61F 2250/0018 : differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/003 : differing in adsorbability or resorbability, i.e. in adsorption or resorption time
• CPC Class Codes: A61F 2310/00011 : Metals or alloys
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00161 : Carbon; Graphite
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00365 : Proteins; Polypeptides; Degradation products thereof
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
• CPC Class Codes: A61F 2310/00976 : Coating or prosthesis-covering structure made of proteins or of polypeptides, e.g. of bone morphogenic proteins BMP or of transforming growth factors TGF

Abstract

A facet joint replacement system having an elongate rod and a polyaxial screw having a groove therein, wherein the rod is slidably received within the groove of the polyaxial screw.

Claims

1. A facet joint replacement component comprising:

a) a body having an elongate first end portion and a second end portion forming an articulation surface,

b) a fastener having a shank having distal threadform thereon adapted to fasten to a bone, and a proximal end having a transverse groove adapted to receive the elongate first end portion of the longitudinal body,

wherein a portion of the elongate first end portion of the longitudinal body is slidably received in the groove of the fastener.

2. The component of claim 1 further comprising:

c) a set screw received within the transverse groove of the fastener.

3. The component of claim 1 wherein the fastener further comprises an integral nut.

4. The component of claim 1 wherein the fastener is a polyaxial screw.

5. The component of claim 1 wherein the fastener is adapted to fasten to a pedicle portion of a vertebral body.

6. The component of claim 1 wherein the elongate first end portion is adapted to extend from a facet region to a pedicle region of a vertebral body.

7. A facet joint replacement system comprising:

a) a superior facet joint component comprising;

i) a longitudinal body having a superior end portion and an inferior end portion, the inferior end portion forming an inner surface, and

ii) a first fastener having a distal threadform adapted to fasten to bone and a proximal groove adapted to receive the superior end portion of the longitudinal body, and

iii) a set screw received within the proximal groove of the fastener,

b) an inferior facet joint component comprising;

i) a body portion,

ii) an outer portion adapted to attach to bone and having a threaded throughhole,

iii) an inner portion having an inner surface adapted to articulate with the inner surface of the superior facet joint component, and

iv) a second fastener received with the threaded throughhole.

8. The system of claim 7 wherein the first fastener further comprises an integral nut.

9. The system of claim 7 wherein the first fastener is a polyaxial screw.

10. The system of claim 7 wherein the first fastener is adapted to fasten to a pedicle portion of a vertebral body.

11. The system of claim 7 wherein the longitudinal body is adapted to extend from a facet region to a pedicle region of a vertebral body.

12. The system of claim 7 wherein the second fastener further comprises an integral nut.

13. The system of claim 7 wherein the second fastener is a polyaxial screw.

14. The system of claim 7 wherein the second fastener is adapted to fasten to a pedicle portion of a vertebral body.

15. The system of claim 7 whererin the inner surface of the inferior facet joint component and the inner surface of the superior facet joint component form a ball and socket.

16. The system of claim 7 wherein the inner surface of the inferior facet joint component and the inner surface of the superior facet joint component each have a cylindrical shape.

17. The system of claim 7 wherein the inner surface of the inferior facet joint component and the inner surface of the superior facet joint component each have a substantially planar shape.

18. A facet joint replacement component kit comprising:

a) a body having an elongate first end portion and a second end portion forming an articulation surface, and

b) a polyaxial screw adapted for adjustable fixation to the longitudinal body.

19. The component of claim 18 further comprising:

c) a set screw received within a transverse groove of the polyaxial screw.

20. The component of claim 18 wherein the screw is adapted to fasten to a pedicle portion of a vertebral body.

21. The component of claim 18 wherein the elongate first end portion is adapted to extend from a facet region to a pedicle region of a vertebral body.

22. A facet joint replacement component comprising:

a) a first facet joint component comprising;

i) a longitudinal body having a first end portion and an second end portion, the second end portion forming a first inner articulation surface, and

ii) means for attaching the longitudinal body to bone, and

b) an second facet joint component comprising;

i) a body portion,

ii) outer portion adapted to attach to bone and having a throughhole,

iii) an inner portion having a second inner articulation surface adapted to articulate with the inner articulation surface of the first facet joint component, and

iv) a fastener received with the threaded throughhole,

wherein the first and second inner articulation surfaces are adapted to form an articulation interface defining an articulation force vector, and

wherein the articulation force vector passes through the fastener.

23. A kit for providing therapy to a functional spinal unit, the unit comprising an upper vertebra having an upper vertebral body and an upper facet, a lower vertebra having a lower vertebral body and a lower facet, the vertebral bodies defining a disc space therebetween, the upper and lower facets defining a facet joint, the kit comprising:

a) a motion disc adapted for insertion into the disc space,

b) a facet joint replacement system adapted for replacement of at least a portion of the facet joint, and

c) a ligament adapted to constrain relative movement between the facets.

24. The kit of claim 23 wherein the motion disc comprises an articulation interface.

25. The kit of claim 23 wherein the motion disc comprises a cushion.

26. The kit of claim 23 wherein the motion disc comprises a spring.

27. The kit of claim 23 wherein the motion disc is adapted for anterior insertion.

28. The kit of claim 23 wherein the motion disc is adapted for posterior insertion.

29. The kit of claim 23 wherein the facet joint replacement comprises an articulation interface.

30. The kit of claim 23 wherein the facet joint replacement system comprises:

i) a superior component adapted to attach to the upper vertebra, and

ii) an inferior component adapted to attach to the lower vertebra.

31. A facet joint replacement system, comprising:

a) an inferior facet replacement component comprising comprisings a bone screw having a threaded shaft and a proximal head adapted for articulation, and

a) a superior facet replacement having an inferior surface adapted for articulation with the proximal head and a superior surface adapted for attachment to a surface of a superior lamina.

32. A method of treating a facet joint, comprising the steps of:

a) injecting an augmentation material into the facet joint.