MATRIX IMPLANT

• US 20160081809A1
• Filed: 09/18/2015
• Published: 03/24/2016
• Est. Priority Date: 09/18/2014
• Status: Active Grant

• Current Assignee: SI-Bone, Incorporated
• Original Assignee: Scott A. Yerby
• Inventors: SCHNEIDER, Bret W., YERBY, Scott A., SIMON, Roxanne, LINDSEY, Derek
• Granted Patent: US 9,662,157 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/7055 connected to sacrum, pelvis or skull
• CPC Class Codes: A61B 17/84 Fasteners therefor or fasteners being internal fixation devices
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• CPC Class Codes: A61F 2002/2839 Bone plugs or bone graft dowels
• CPC Class Codes: A61F 2002/30115 circular-O-shaped
• CPC Class Codes: A61F 2002/30149 pentagonal
• CPC Class Codes: A61F 2002/30154 square
• CPC Class Codes: A61F 2002/30156 triangular
• CPC Class Codes: A61F 2002/30171 rosette- or star-shaped
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30995 for sacro-iliac joints
• CPC Class Codes: A61F 2002/4495 having a fabric structure, e.g. made from wires or fibres

Abstract

Implants for the fusion or fixation of two bone segments are described. For example, the implants can be used for the fusion or fixation of the sacroiliac joint. The implants can have a matrix structure, have a rectilinear cross-sectional area, and have a curvature.

Claims

1. An implant for the fixation or fusion of the SI-Joint, the implant comprising:

an elongate body having a longitudinal axis and a rectilinear overall cross-sectional profile transverse to the longitudinal axis, the elongate body having a proximal end and a distal end, the elongate body comprising;

a plurality of apex struts aligned with the longitudinal axis and extending between the proximal end and the distal end of the elongate body;

a plurality of support struts that extend from one apex strut to another apex strut to form a matrix structure; and

a first guide pin receptacle located along the longitudinal axis of the elongate body.

2. The implant of claim 1, wherein the rectilinear overall cross-sectional profile is triangular.

3. The implant of claim 1, wherein the rectilinear overall cross-sectional profile is rectangular or square.

4. The implant of claim 1, wherein the elongate body is curved along the longitudinal axis from the proximal end to the distal end of the elongate body.

5. The implant of claim 4, wherein the elongate body has a curvature between about 5 and 45 degrees.

6. The implant of claim 1, wherein the elongate body has a curvature between about 15 and 30 degrees.

7. The implant of claim 1, wherein the guide pin receptacle has a circular opening adapted to securely receive a guide pin.

8. The implant of claim 1, wherein the elongate body is coated with a titanium plasma spray.

9. The implant of claim 1, wherein the elongate body is coated with hydroxyapatite.

10. The implant of claim 1, wherein the elongate body is made of metal.

11. The implant of claim 10, wherein the metal is titanium.

16. The implant of claim 1, wherein the elongate body is made of a ceramic material.

17. The implant of claim 1, wherein the elongate body is mode of a plastic material.

18. The implant of claim 1, wherein the elongate body has a porous outer surface.

19. The implant of claim 17, wherein the porous outer surface has a pore size between about 100 to 1000 microns.

20. The implant of claim 1, wherein the thickness of the apex struts and the support struts is between about 1 to 5 mm.

21. The implant of claim 1, wherein the first guide pin receptacle is located at the distal end of the elongate body.

22. The implant of claim 1, wherein the first guide pin receptacle is located at the proximal end of the elongate body.

23. The implant of claim 1, wherein the first guide pin receptacle is located at the distal end of the elongate body and a second guide pin receptacle is located at the proximal end of the body.

24. The implant of claim 23, further comprising a cannula extending between the first guide pin receptacle and the second guide pin receptacle.

25. The implant of claim 23, wherein a third guide pin receptacle is located between the first guide pin receptacle and the second guide pin receptacle.

26. The implant of claim 23, wherein a plurality of pin receptacles are located between the first guide pin receptacle and the second guide pin receptacle.

12. The implant of clam 10, wherein the metal comprises a lattice structure.

13. The implant of claim 12, wherein the lattice structure is cubic.

14. The implant of claim 13, wherein the lattice structure is hexagonal.

15. The implant of claim 12, wherein the lattice structure comprises a plurality of beams with a diameter between about 100 to 1000 microns.

27. A modular implant for the fixation or fusion of the SI-Joint, the modular implant comprising:

a distal portion comprising a frame, the frame joined to a distal guide pin receptacle and to a plurality of transverse support struts arranged in a rectilinear configuration;

a proximal portion comprising a frame joined to a proximal guide pin receptacle and to a plurality of transverse support struts arranged in a rectilinear configuration; and

at least one repeating internal portion comprising;

a plurality of apex struts joined together by oblique support struts arranged in an oblique configuration between the apex struts,

a plurality of transverse support struts arranged perpendicularly to the apex struts, the plurality of transverse support struts arranged in a rectilinear configuration at both a proximal end and a distal end of the repeating internal portion, and

an internal guide pin receptacle secured to the support struts and aligned with both the distal guide pin receptacle and the proximal guide pin receptacle;

wherein the at least one internal repeating portion is positioned between the distal portion and the proximal portion such that the transverse support struts of the distal portion are aligned with a first set of transverse support struts of the repeating internal portion and the transverse support struts of the proximal portion are aligned with a second set of transverse support struts of a repeating internal portion.

28. The modular implant of claim 27, wherein the oblique supports struts are arranged in an “

X”

configuration.

29. The modular implant of claim 27, wherein the oblique supports struts are arranged in a non-overlapping diagonal configuration.