Methods of fusing a sacroiliac joint

Patent metadata

Field	Value
Publication number	US-9833320-B2
Application number	US-201615061524-A
Country	US
Kind code	B2
Filing date	Mar 4, 2016
Priority date	Jan 13, 2010
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

Systems for and methods of fusing a sacroiliac joint are provided which may include an implant adapted to be inserted into the joint space defined by the bones of a sacrum and an ilium and a delivery tool for inserting the implant into the sacroiliac joint. The method may include delivering the implant into the SI joint in a first position and transitioning the implant from the first position to a second position in situ. The implant may be configured such that in the second position the implant generally mimics a shape of the joint space of the sacroiliac joint. The implant may further include an actuation mechanism configured to cause the implant to transition from the first position to the second position. The actuation mechanism may include a hydraulic, pneumatic, geared or screwed mechanical arrangement.

First claim

The invention claimed is:

1. A method of fusing a sacroiliac joint including: bone material including a sacrum and an ilium; a joint space defined between the sacrum and the ilium and defining a joint plane; an extra-articular space including an extra-articular recess access region; and an articular region including a posterior inferior access region, a superior boundary segment, an anterior boundary segment, a caudal region, and a cranial region, the method comprising:
positioning an implant adjacent the sacroiliac joint, the implant comprising a proximal end, a distal end generally opposite the proximal end, first and second lateral sides extending between the proximal and distal ends, and a member near the distal end configured to displace from a first position to a second position, wherein the first position is such that the member is generally recessed within the implant such that a lateral side surface of the member is generally flush with the first lateral side, and wherein the second position is such that the member extends from the first lateral side such that the lateral side surface of the member is offset from the first lateral side;
delivering the implant into the sacroiliac joint in the first position via a posterior approach such that the first and second lateral sides are generally positioned in the joint plane; and
transitioning the implant from the first position to the second position.

2. The method of claim 1 , wherein, in the second position, the implant generally mimics a shape of the joint space of the sacroiliac joint.

3. The method of claim 1 , wherein, in the second position, the implant substantially fills the joint space of the sacroiliac joint.

4. The method of claim 1 , wherein, in the second position, the member is positioned at least partially within the cranial region of the sacroiliac joint.

5. The method of claim 1 , wherein, in the second position, the member is positioned generally within the joint plane.

6. The method of claim 1 , wherein the implant further comprises: a body extending between the distal and proximal ends; and a first keel extending outwardly from the body and extending at least partially between the distal and proximal ends.

7. The method of claim 6 , wherein the implant further comprises: a second keel extending outwardly from the body and extending at least partially between the distal and proximal ends.

8. The method of claim 7 , wherein the first and second keel are on opposite sides of the implant.

9. The method of claim 8 , wherein the first and second keels are generally coplanar with each other.

10. The method of claim 9 , wherein the first and second keels are centrally positioned on the body of the implant between the first and second lateral sides.

11. The method of claim 1 , wherein the implant further comprises: a body extending between the distal and proximal ends; and a void extending through the body.

12. The method of claim 11 , wherein the void is rectangular.

13. The method of claim 1 , wherein the member is displaceably supported on the implant via a rail arrangement.

14. The method of claim 1 , further comprising an actuation mechanism configured to cause the member to transition from the first position to the second position.

15. The method of claim 14 , wherein the actuation mechanism is actuatable via an access at the proximal end.

16. The method of claim 15 , wherein the step of transitioning the implant from the first position to the second position comprises actuating the actuation mechanism at the proximal end of the implant.

17. The method of claim 15 , wherein the actuation mechanism includes a hydraulic, pneumatic, geared or screwed mechanical arrangement.

18. The method of claim 1 , wherein the member is positioned proximal of a distal tip of the implant.

19. The method of claim 1 , wherein the implant further comprises a planar body extending between the distal and proximal ends, the planar body comprising a pair of first planar faces opposite each other, the member being planar and comprising a pair of second planar faces opposite each other, the first pair of planar faces being generally parallel with the second pair of planar faces.

20. The method of claim 19 , wherein the implant further comprises at least one keel extending outwardly from at least one of the pair of first planar faces.

21. The method of claim 1 , wherein the implant further comprises a planar body having a sacral facing surface and an ilium facing surface, the sacral facing surface configured to oppose the sacrum and the ilium facing surface configured to oppose the ilium when the implant is delivered into the sacroiliac joint.

22. The method of claim 1 , wherein delivering the implant into the sacroiliac joint in the first position via a posterior approach comprises positioning the distal end of the implant adjacent the anterior boundary segment of the sacroiliac joint.

23. The method of claim 1 , wherein in transitioning the implant from the first position to the second position the member extends towards the superior boundary segment of the sacroiliac joint.

24. The method of claim 1 , wherein delivering the implant into the sacroiliac joint in the first position via a posterior approach comprises delivering the implant into the caudal region through the posterior inferior access region of the sacroiliac joint.

25. The method of claim 1 , wherein delivering the implant into the sacroiliac joint in the first position via a posterior approach comprises delivering the implant into the extra-articular space through the extra-articular recess access region.

26. The method of claim 1 , wherein the member is a rectangular member having oppositely oriented bone engaging surface having a plurality of ridges thereon to operatively engage the sacrum or the ilium.

27. The method of claim 1 , wherein the second position comprises the lateral side surface of the member being generally parallel to the first lateral side.

28. A method of fusing a sacroiliac joint including: bone material including a sacrum and an ilium; a joint space defined between the sacrum and the ilium and defining a joint plane; an extra-articular space including an extra-articular recess access region; and an articular region including a posterior inferior access region, a superior boundary segment, an anterior boundary segment, a caudal region, and a cranial region, the method comprising:
positioning an implant adjacent the sacroiliac joint, the implant comprising a proximal end, a distal end generally opposite the proximal end, first and second lateral sides extending between the proximal and distal ends, a portion of the first lateral side configured to displace from a first position to a second position, wherein the first position is such that the portion is generally flush with another portion of the first lateral side, and wherein the second position is such that the portion extends from the first lateral side such that the portion is offset from the another portion of the first lateral side;
delivering the implant into the sacroiliac joint in the first position such that the first and second lateral sides are generally positioned in the joint plane; and
transitioning the implant from the first position to the second position.

29. The method of claim 28 , wherein, in the second position, the portion comprises a surface

Assignees

• Jcbd Llc

Inventors

• Donner Edward Jeffrey
• Donner Christopher Thomas

Classifications

• A61B17/1671

  for the spine · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• A61B2017/00876

  magnetic · CPC title

• A61F2/4603

  for insertion or extraction of endoprosthetic joints or of accessories thereof · CPC title

• A61F2002/30179

  X-shaped · CPC title