Sacroiliac joint implant and sacroiliac joint instrument for fusing a sacroiliac joint

Patent metadata

Field	Value
Publication number	US-9381045-B2
Application number	US-201213475695-A
Country	US
Kind code	B2
Filing date	May 18, 2012
Priority date	Jan 13, 2010
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A system for fixating a dysfunctional sacroiliac joint for SI joint fusion, the system including a sacroiliac joint implant, a sacroiliac joint screw or rod and a delivery tool configured for approaching a sacroiliac joint. The system may include an implant having a porous 3D matrix structure and may be manufactured by laser or electron beam additive manufacturing. The delivery tool may include a radiolucent material. The SI fusion system may further include custom sacroiliac joint implants, anchors, alignment tools or targeting arms manufactured for a particular patient. Pre-surgical imaging studies, including 3D rendering, and their interpretation may assist in planning desired trajectories, anchor dimensions and implant dimensions and may provide details specific to the manufacture of particular sacroiliac joint tools or implants and their implantation into the sacroiliac joint. The system may be configured for use with surgical robots and may include an integrated nerve monitoring and stimulation system.

First claim

What is claimed is:

1. A sacroiliac joint fusion system for fusing a sacroiliac joint having a sacrum, an ilium, and a joint plane defined between the sacrum and the ilium, the system comprising:
a) a joint implant comprising a body having a hollow interior and an exterior surface having a plurality of openings defined therein that extend into the hollow interior, a first lateral side comprising a first surface, a second lateral side opposite the first lateral side comprising a second surface, a side extending between the first and second lateral sides, and a first bore extending through the joint implant, the first and second surfaces being generally parallel to each other, the hollow interior being adapted to have a biological material located therein prior to the implantation of the joint implant, the side extending a perimeter of the joint implant and including a closed inferior side so as to limit an amount of seepage of the biological material from the hollow interior of the joint implant;
b) an anchor element configured to be received in the first bore; and
c) a delivery tool comprising:
i) an implant arm configured to releasably couple to the joint implant and configured to deliver the joint implant into the sacroiliac joint such that the first and second surfaces are generally parallel with the joint plane of the sacroiliac joint; and
ii) an anchor arm coupled to the implant arm and configured to deliver the anchor element to the first bore,

wherein a final manufactured configuration of the tool and a final manufactured configuration of the joint implant are such that, when the system is assembled such that the implant arm is releasably coupled to the joint implant, a delivery arrangement automatically exists such that the anchor arm is correctly oriented to deliver the anchor element to the first bore.

2. The system of claim 1 , wherein in being coupled together, the implant arm and anchor arm form an angle relative to each other, and the angle is non-adjustable.

3. The system of claim 1 , wherein the first bore extends non-parallel to the hollow interior.

4. The system of claim 3 , wherein the joint implant further comprises a first pair of planar members extending from the body of the joint implant.

5. The system of claim 4 , wherein the hollow interior extends within the confines of the first pair of planar members and the exterior surface in which the plurality of openings is defined includes exterior planar surfaces of the first pair of planar members.

6. The system of claim 5 , wherein the implant further comprises a second pair of planar members extending from the body of the joint implant generally perpendicular to the first pair of planar members.

7. The system of claim 6 , wherein the first pair of planar members extend over a wider radial extent than the second pair of planar members.

8. The system of claim 1 , wherein the side further includes an open superior side opposite the closed inferior side and configured to allow and promote boney growth or expansion of biological material inserted within the joint implant toward certain areas within the sacroiliac joint and away or not toward certain other areas of the sacroiliac joint when the implant is implanted in the sacroiliac joint.

9. A system for fusing a sacroiliac joint having a sacrum, and ilium, and a joint plane defined between the sacrum and the ilium, the system comprising:
a) a joint implant comprising a longitudinal axis, a distal end, a proximal end opposite the distal end, a first lateral side extending between the distal and proximal ends, a second lateral side opposite the first lateral side and extending between the distal and proximal ends, and a side extending a perimeter of the joint implant between the first and second lateral sides and comprising a superior side including an access opening extending into an inner portion of the joint implant, the inner portion configured to receive biological material therein via the access opening, the first and second lateral sides comprising a plurality of interconnected members defining openings extending between groups of multiple interconnected members of the plurality of interconnected members, the openings extending into the inner portion of the joint implant; and
b) a delivery system comprising:
i) an implant arm configured to releasably couple to the joint implant and configured to deliver the joint implant into the sacroiliac joint such that first and second lateral sides are generally parallel with the joint plane of the sacroiliac joint; and
ii) an anchor arm in cooperation with the implant arm and configured to guide a delivery of an anchor element into a region of the sacroiliac joint relative to the joint implant, wherein a manufacturer supplied configuration of the fusion system is such that when the implant arm and the anchor arm are operably coupled and when the implant arm is releasably coupled to the joint implant, a delivery arrangement automatically exists such that the anchor arm is configured to guide the delivery of the anchor element to a predetermined location relative to the joint implant.

10. The system of claim 9 , wherein the delivery system further comprises a driving tool configured to releasably couple with a proximal end region of the anchor element, wherein the driving tool is configured to be guided by the anchor arm.

11. The system of claim 9 , wherein the predetermined location is adjacent the joint implant.

12. The system of claim 9 , wherein the predetermined location is cranial or caudal of the joint implant.

13. The system of claim 9 , wherein the joint implant further comprises a first bore extending at least partially through the joint implant, and wherein the predetermined location is within the bore of the joint implant.

14. The system of claim 9 , wherein the delivery arrangement is fixed and nonadjustable.

15. The system of claim 9 , wherein the delivery arrangement is adjustably fixed.

16. The system of claim 9 , wherein the anchor arm comprises a collar that is configured to guide a surgical tool in delivering the anchor element to the predetermined location relative to the joint implant.

17. The system of claim 9 , wherein the joint implant further comprises a first bore extending at least partially through the joint implant.

18. The system of claim 17 , wherein the first bore extends non-parallel to the longitudinal axis of the joint implant.

19. The system of claim 17 , wherein the first bore extends into at least one of the first or second lateral sides of the joint implant.

20. The system of claim 19 , wherein the bore comprises an inner surface including a bore perimeter being closed and generally surrounded by and in close proximity to the openings.

21. The system of claim 17 , wherein the first bore extends through the first and second lateral sides of the joint implant.

22. The system of claim 17 , wherein the first bore extends substantially parallel to the longitudinal axis of the joint implant.

23. The system of claim 17 , wherein the first bore extends distally from the proximal end of the joint implant and is configured to receive a feature of a distal end of the implant arm.

24. The system of claim 9 , wherein the inner portion of the joint implant comprises a hollow interior, which is adapted to have the biological material located therein prior to the implantation of the joint implant.

25. The system of claim 9 , wherein the

Assignees

• Donner Edward Jeffrey
• Donner Christopher Thomas
• Jcbd Llc

Inventors

• Donner Edward Jeffrey
• Donner Christopher Thomas

Classifications

• A61F2002/30179

  X-shaped · CPC title

• A61F2/44

  for the spine, e.g. vertebrae, spinal discs · CPC title

• A61F2/46

  Special tools for implanting artificial joints · CPC title

• A61F2002/30622

  Implant for fusing a joint or bone material · CPC title

• A61F2310/00017

  Iron- or Fe-based alloys, e.g. stainless steel · CPC title