Systems and methods for the fixation or fusion of bone at or near a sacroiliac joint

• US 9,662,158 B2
• Filed: 12/04/2008
• Issued: 05/30/2017
• Est. Priority Date: 08/09/2004
• Status: Active Grant

• Current Assignee: SI-Bone, Incorporated
• Original Assignee: SI-Bone, Incorporated
• Inventors: Reiley, Mark A
• Primary Examiner(s): SEVILLA, CHRISTIAN ANTHONY
• Application Number:
  US12/315,559
• Publication Number:
  US 20090259261A1
• Time in Patent Office: 3,099 Days
• Field of Search: 606329, 606 96, 623 1611, 623 1716
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/7055 connected to sacrum, pelvis or skull
• CPC Class Codes: A61B 17/846 Nails or pins, i.e. anchors without movable parts, holding by friction only, with or without structured surface A61B17/72, A61B17/86 take precedence
• CPC Class Codes: A61B 17/8897 Guide wires or guide pins
• CPC Class Codes: A61F 2/0077 Special surfaces of prostheses, e.g. for improving ingrowth A61F2/30767 takes precedence
• CPC Class Codes: A61F 2/28 Bones joints A61F2/30
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• 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 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 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30156 triangular
• CPC Class Codes: A61F 2002/30179 X-shaped
• CPC Class Codes: A61F 2002/3023 wedge-shaped cylinders
• CPC Class Codes: A61F 2002/30235 tubular, e.g. sleeves
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/305 Snap connection
• CPC Class Codes: A61F 2002/30576 with extending fixation tabs
• CPC Class Codes: A61F 2002/30604 modular
• CPC Class Codes: A61F 2002/30622 Implant for fusing a joint or bone material
• CPC Class Codes: A61F 2002/30777 : Oblong apertures
• CPC Class Codes: A61F 2002/30785 : parallel
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/3082 : Grooves
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/3085 : with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
• CPC Class Codes: A61F 2002/30995 : for sacro-iliac joints
• CPC Class Codes: A61F 2002/4238 : for tarso-metatarsal joints, i.e. TMT joints
• CPC Class Codes: A61F 2002/448 : comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
• 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 2230/0023 : triangular
• CPC Class Codes: A61F 2230/0058 : X-shaped
• CPC Class Codes: A61F 2230/0069 : cylindrical
• 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 2310/00131 : Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00329 : Glasses, e.g. bioglass
• 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 2310/0097 : Coating or prosthesis-covering structure made of pharmaceutical products, e.g. antibiotics

Abstract

At least one bone fixation device comprising a stem having a maximum outer diameter is inserted into the sacroiliac joint through a minimally invasive incision path sized approximately at or about the maximum outer diameter of the stem in soft tissue, into the iliac bone, across the sacroiliac joint and into the sacrum. The stem is inserted through the incision path to a position within the sacroiliac joint between the iliac bone and the sacrum, to fuse the sacroiliac joint, without invasive joint preparation, removal of cartilage, or scraping at or near the sacroiliac joint. Desirably, at least a portion of the stem includes a surface permitting bony in-growth.

Claims

1. A joint fusion device, the joint fusion device comprising:

an elongated, stem-like device having a triangular cross section free of external screw threads and lateral fenestrations, the device being sized and configured for placement to fuse a sacroiliac joint, which lies between an iliac bone and a sacrum, in response to an axially applied, non-rotational force, the elongated, stem-like device having an exterior surface treated to provide bony in-growth and/or on-growth upon placement, wherein the elongated, stem-like device is formed from one or more materials selected from a group consisting of titanium, titanium alloys, tantalum, chrome cobalt, and surgical steel, wherein the triangular cross section of the elongated, stem-like device is configured to inhibit movement of the sacroiliac joint without the use of an additional component transversely intersecting the device through a lateral fenestration, wherein the elongated, stem-like device has a minimum length greater than a thickness of the iliac bone at the sacroiliac joint.

2. A joint fusion device according to claim 1 further comprising a porous surface conducive to bony in-growth.

3. A joint fusion device according to claim 2 wherein the porous surface is formed by a coating.

4. A joint fusion device according to claim 1 further comprising hydroxyapatite.

5. A joint fusion device according to claim 1, wherein the elongated, stem-like device comprises a lumen to accommodate close fitting passage over a guide pin during placement.

6. A joint fusion device according to claim 1, wherein the elongated, stem-like device has a maximum length less than a distance between a lateral surface of the iliac bone and a midline of sacral vertebral bodies.

7. A joint fusion device, the joint fusion device comprising:

an elongated, stem-like device having a triangular cross section free of external screw threads and lateral fenestrations, the device being sized and configured for placement to fuse a sacroiliac joint, which lies between an iliac bone and a sacrum, in response to an axially applied, non-rotational force, the elongated, stem-like device having an exterior surface treated to provide bony in-growth and/or on-growth upon placement, wherein the elongated, stem-like device is formed from one or more materials selected from a group consisting of titanium, titanium alloys, tantalum, chrome cobalt, and surgical steel, wherein the triangular cross section of the elongated, stem-like device is configured to inhibit movement of the sacroiliac joint without the use of an additional component transversely intersecting the device through a lateral fenestration, wherein the elongated, stem-like device has a maximum length less than a distance between a lateral surface of the iliac bone and a midline of sacral vertebral bodies.

8. A joint fusion device, the joint fusion device comprising:

an elongated, stem-like device having a triangular cross section free of external screw threads and lateral fenestrations, the device being sized and configured for placement to fuse a sacroiliac joint, which lies between an iliac bone and a sacrum, in response to an axially applied, non-rotational force, the elongated, stem-like device having an exterior surface treated to provide bony in-growth upon placement, wherein the elongated, stem-like device is formed from one or more materials selected from a group consisting of titanium, titanium alloys, tantalum, chrome cobalt, and surgical steel, wherein the triangular cross section of the elongated, stem-like device is configured to inhibit movement of the sacroiliac joint without the use of an additional component transversely intersecting the device through a lateral fenestration, wherein the elongated, stem-like device has a length that is approximately equal to a distance between a lateral surface of the iliac bone and a dorsal sacral foramina of the sacrum.