Variable lordosis spacer and related methods of use

• US 10,092,417 B2
• Filed: 04/21/2017
• Issued: 10/09/2018
• Est. Priority Date: 02/07/2014
• Status: Active Grant

• Current Assignee: Globus Medical, Inc.
• Original Assignee: Globus Medical, Inc.
• Inventors: Weiman, Mark, Glerum, Chad, Burkhardt, Alex, Gahman, Kevin
• Primary Examiner(s): PLIONIS, NICHOLAS J
• Application Number:
  US15/493,428
• Publication Number:
  US 20170224503A1
• Time in Patent Office: 536 Days
• Field of Search: 623 1711- 1716
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• 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 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/2817 Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF]
• CPC Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30266 wedge-shaped parallelepipeds
• CPC Class Codes: A61F 2002/30405 made by screwing complementary threads machined on the parts themselves
• CPC Class Codes: A61F 2002/30411 having two threaded end parts connected by a threaded central part with opposite threads at its opposite ends, i.e. for adjusting the distance between both end parts by rotating the central part
• CPC Class Codes: A61F 2002/30482 using a locking cam
• CPC Class Codes: A61F 2002/30484 Mechanically expandable devices located on the first prosthetic part for locking into or onto the second prosthetic part
• CPC Class Codes: A61F 2002/30538 for adjusting angular orientation
• CPC Class Codes: A61F 2002/30556 for adjusting thickness
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30601 telescopic
• CPC Class Codes: A61F 2002/30828 parallel
• CPC Class Codes: A61F 2002/30843 Pyramidally-shaped
• CPC Class Codes: A61F 2002/30904 : serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/30953 : using a remote computer network, e.g. Internet
• 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 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00407 : Coating made of titanium or of Ti-based alloys
• CPC Class Codes: A61F 2310/00796 : Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Abstract

An expandable fusion device may include a first endplate and a second endplate. The expandable fusion device may also include first and second ramps configured to mate with both the first and second endplates. An inserter instrument includes an outer shaft having a bore extending longitudinally therethrough and an inner shaft extending through the bore in the outer shaft. The outer shaft is configured to engage the first or second opening in the second ramp, and the inner shaft is configured to engage the corresponding first or second opening in the first ramp to control implant height and/or lordotic angle.

Claims

1. A medical system comprising:

an expandable device comprising;

an upper endplate;

a lower endplate opposed to the upper endplate;

a first ramp positioned between the upper endplate and the lower endplate, wherein the first ramp includes a first upper angled surface that engages the upper endplate and a first lower angled surface that engages the lower endplate;

a second ramp positioned between the upper endplate and the lower endplate, wherein the second ramp includes a second upper angled surface that engages the upper endplate and a second lower angled surface that engages the lower endplate; and

an actuation mechanism insertable into the first ramp and the second ramp that causes expansion between the upper endplate and the lower endplate,

wherein the first upper angled surface of the first ramp and the second upper angled surface of the second ramp are at different angles relative to one another,

wherein the first ramp includes a first bore for receiving the actuation mechanism and a second bore for receiving graft material

wherein the second ramp include a first bore for receiving the actuation mechanism and a second bore for receiving graft material

wherein the first bore of the first ramp is aligned with the first bore of the second ramp, and the second bore of the first ramp is aligned with the second bore of the second ramp.

2. The system of claim 1, wherein the first ramp is configured to move toward the second ramp to cause expansion between the upper endplate and lower endplate.

3. The system of claim 1, wherein the upper endplate comprises an opening and the lower endplate comprises an opening.

4. The system of claim 1, wherein the first bore in the first ramp is aligned with the first bore in the second ramp.

5. The system of claim 4, wherein the first bore in the first ramp is threaded and the first bore in the second ramp is threaded.

6. The system of claim 1, wherein the first bore and second bore of the first ramp are adjacent to one another.

7. The system of claim 6, wherein the first bore in the first ramp is threaded and the second bore is non-threaded.

8. The system of claim 1, wherein the actuation mechanism comprises a head, a neck and a threaded shaft.

9. The system of claim 1, further comprising a snap ring that connects the actuation mechanism to the second ramp.

10. A medical system comprising:

an expandable device comprising;

an upper endplate;

a lower endplate opposed to the upper endplate;

a first ramp positioned between the upper endplate and the lower endplate, wherein the first ramp includes a first upper angled surface that engages the upper endplate and a first lower angled surface that engages the lower endplate;

a second ramp positioned between the upper endplate and the lower endplate, wherein the second ramp includes a second upper angled surface that engages the upper endplate and a second lower angled surface that engages the lower endplate; and

an actuation mechanism insertable into the first ramp and the second ramp that causes expansion of the expandable device,

wherein the first upper angled surface of the first ramp and the second upper angled surface of the second ramp are at different angles relative to one another,

wherein the first ramp includes a first bore for receiving the actuation mechanism and a second bore for receiving graft material

wherein the second ramp include a first bore for receiving the actuation mechanism and a second bore for receiving graft material

wherein the first bore of the first ramp is aligned with the first bore of the second ramp, and the second bore of the first ramp is aligned with the second bore of the second ramp.

11. The system of claim 10, further comprising an inserter instrument.

12. The system of claim 11, wherein the inserter instrument comprises an inner threaded shaft and an outer threaded shaft.

13. The system of claim 12, wherein the inner threaded shaft is configured to attach to the first ramp and the outer threaded shaft is configured to attach to the second ramp.

14. The system of claim 10, wherein the upper endplate comprises an opening and the lower endplate comprises an opening.

15. The system of claim 10, wherein the first bore in the first ramp is aligned with the first bore in the second ramp.

16. The system of claim 15, wherein the first bore in the first ramp is threaded and the first bore in the second ramp is threaded.

17. The system of claim 10, wherein the actuation mechanism comprises a head, a neck and a threaded shaft.

18. The system of claim 10, wherein the first bore and a second bore of the first ramp are adjacent to one another.