Variable lordosis spacer and related methods of use

• US 9,402,739 B2
• Filed: 02/07/2014
• Issued: 08/02/2016
• Est. Priority Date: 02/07/2014
• Status: Active Grant

• Current Assignee: Globus Medical, Inc.
• Original Assignee: Globus Medical, Inc.
• Inventors: Weiman, Mark, Glerum, Chad
• Primary Examiner(s): Plionis, Nicholas
• Application Number:
  US14/175,601
• Publication Number:
  US 20150223945A1
• Time in Patent Office: 907 Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2/30 Joints
• 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 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/46 Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
• 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 2002/30537 adjustable
• 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 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 also may include a first ramp configured to mate with both the first and second endplates. The first ramp may be a wedge with an incline extending along a longitudinal axis of the expandable fusion device, and also may be a wedge having an incline extending along a lateral axis of the expandable fusion device. A second ramp may be configured to mate with both the first and second endplates. The first ramp may be a wedge having an incline extending along the longitudinal axis of the expandable fusion device, and also may be wedge having an incline extending along the lateral axis of the expandable fusion device.

Claims

1. An expandable fusion device comprising:

a first endplate having an upper surface defining a first plane extending from a first side of the expandable fusion device to a second side of the expandable fusion device;

a second endplate having a lower surface defining a second plane extending from the first side of the expandable fusion device to the second side of the expandable fusion device;

a first ramp configured to mate with both the first and second endplates, wherein the first ramp is a wedge with an incline extending along a longitudinal axis of the expandable fusion device, and is also a wedge having an incline extending along a lateral axis of the expandable fusion device; and

a second ramp configured to mate with both the first and second endplates, wherein the second ramp is a wedge having an incline extending along the longitudinal axis of the expandable fusion device, and is also a wedge having an incline extending along the lateral axis of the expandable fusion device

wherein the expandable fusion device is moveable between a collapsed configuration and an expanded configuration, and

wherein in the collapsed configuration the first plane and second plane are non-parallel.

2. The expandable fusion device of claim 1, wherein the first and second endplates each include at least one first mating feature configured to mate with at least one corresponding first mating feature disposed on the first ramp.

3. The expandable fusion device of claim 2, wherein the at least one mating feature of the first and second endplates is slidable with respect to the at least one corresponding first mating feature disposed on the first ramp.

4. The expandable fusion device of claim 2, wherein the first and second endplates each include a second mating feature configured to mate with a corresponding second mating feature disposed on the first ramp.

5. The expandable fusion device of claim 4, wherein the second mating feature and the corresponding second mating feature are each C-shaped, V-shaped, or U-shaped.

6. The expandable fusion device of claim 4, wherein the first and second endplates each include a third mating feature configured to mate with a corresponding third mating feature disposed on the second ramp.

7. The expandable fusion device of claim 6, wherein the third mating feature and the corresponding third mating feature are each C-shaped, V-shaped, or U-shaped.

8. The expandable fusion device of claim 1, wherein each of the first and second endplates have an inner surface configured to mate with the first ramp, wherein the inner surface of each of the first and second endplates are shaped as a concave curve, the concave curve being formed about the longitudinal axis of the expandable fusion device.

9. The expandable fusion device of claim 1, wherein the expandable fusion device comprises at least one bore configured to receive graft material.

10. The expandable fusion device of claim 1, wherein the first ramp is coupled to the second ramp by an actuating mechanism, and the expandable fusion device is configured to transition from the collapsed configuration to the expanded configuration via actuation of the actuating mechanism to move the second ramp and the first ramp toward one another.

11. The expandable fusion device of claim 1, wherein, in the expanded configuration, the expandable fusion device is a wedge having an incline extending along the lateral axis of the expandable fusion device.

12. The expandable fusion device of claim 1, wherein the first and second endplates each have an outer surface configured to contact a respective vertebral body, wherein each outer surface of the first and second endplates has one or more of teeth, ridges, friction increasing elements, keels, or gripping or purchasing projections.

13. An expandable fusion device, comprising:

a first endplate and a second endplate, both the first and second endplates extending from a first side of the expandable fusion device to a second side of the expandable fusion device;

a first ramp and a second ramp, both the first ramp and the second ramp being configured to mate with both the first and second endplates, and both the first ramp and the second ramp extending from the first side of the expandable fusion device to the second side of the expandable fusion device,

wherein at least one of the first and second sides of the expandable fusion device pivotally expand about a pivot point,

wherein the expandable fusion device is moveable between a collapsed configuration and an expanded configuration, and

wherein the first side has a first height and the second side has a second height, the second height being greater than the first height in the collapsed configuration and in the expanded configuration.

14. The expandable fusion device of claim 13, wherein both of the first and second sides of the expandable fusion device pivotally expand about the same pivot point.

15. The expandable fusion device of claim 14, wherein the same pivot point is a point disposed outside of the expandable fusion device.

16. The expandable fusion device of claim 13, wherein the pivot point is disposed along the first side or between the first and second sides of the expandable fusion device.

17. The expandable fusion device of claim 16, wherein only the second side of the expandable fusion device pivots about the pivot point.