Expandable fusion device and method of installation thereof

• US 8,864,833 B2
• Filed: 09/30/2011
• Issued: 10/21/2014
• Est. Priority Date: 09/30/2011
• Status: Active Grant

• Current Assignee: Globus Medical, Inc.
• Original Assignee: Globus Medical, Inc.
• Inventors: Glerum, Chad, Iott, Andrew, Adams, Mark, Davenport, Daniel, Weiman, Mark
• Primary Examiner(s): Philogene, Pedro
• Assistant Examiner(s): Negrellirodrigue, Christina
• Application Number:
  US13/250,391
• Publication Number:
  US 20130085572A1
• Time in Patent Office: 1,117 Days
• Field of Search: 606/246, 606/248, 606/249, 623 1711- 1716
• US Class Current: 623/17.16
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• 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 2/4455 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 2/4684 Trial or dummy 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 2002/30207 Double convex cones, i.e. element having two convex cones, one at each of its opposite ends
• CPC Class Codes: A61F 2002/3021 frustoconical
• CPC Class Codes: A61F 2002/30265 Flat parallelepipeds
• CPC Class Codes: A61F 2002/30266 wedge-shaped parallelepipeds
• CPC Class Codes: A61F 2002/30365 with additional means for limiting said rotation
• CPC Class Codes: A61F 2002/30367 with additional means for preventing said rotation
• CPC Class Codes: A61F 2002/30372 with additional means for limiting said translation
• CPC Class Codes: A61F 2002/30373 with additional means for preventing said translation
• CPC Class Codes: A61F 2002/30387 Dovetail connection
• 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 2002/30471 : connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type
• 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 2002/30517 : using a locking plate
• CPC Class Codes: A61F 2002/30522 : releasable, e.g. using a releasable ratchet
• CPC Class Codes: A61F 2002/30523 : by means of meshing gear teeth
• CPC Class Codes: A61F 2002/30545 : for adjusting a diameter
• CPC Class Codes: A61F 2002/30553 : for adjusting a position by translation along an axis
• CPC Class Codes: A61F 2002/30556 : for adjusting thickness
• CPC Class Codes: A61F 2002/30558 : Force-limiting means
• CPC Class Codes: A61F 2002/30576 : with extending fixation tabs
• CPC Class Codes: A61F 2002/30578 : having apertures, e.g. for receiving fixation screws
• CPC Class Codes: A61F 2002/30579 : with mechanically expandable devices, e.g. fixation devices
• CPC Class Codes: A61F 2002/30593 : hollow
• CPC Class Codes: A61F 2002/30594 : slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
• CPC Class Codes: A61F 2002/30601 : telescopic
• CPC Class Codes: A61F 2002/30604 : modular
• CPC Class Codes: A61F 2002/30607 : Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
• CPC Class Codes: A61F 2002/30774 : internally-threaded
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30843 : Pyramidally-shaped
• CPC Class Codes: A61F 2002/30904 : serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2250/0004 : adjustable
• 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

Abstract

The present invention provides an expandable fusion device capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. In one embodiment, the fusion device includes a body portion, a first endplate, and a second endplate, the first and second endplates capable of being moved in a direction away from the body portion into an expanded configuration or capable of being moved towards the body portion into an unexpanded configuration. The fusion device is capable of being deployed and installed in both configurations.

Claims

1. An expandable device comprising:

a first endplate;

a second endplate;

a body portion that extends along at least a length of the first endplate and the second endplate, the body portion including an interference nut;

a translation member receivable within the body portion in between the first endplate and the second endplate; and

an actuation member insertable through the body portion and into contact with the translation member, wherein the actuation member passes through the interference nut

further comprising at least two stabilizing members positioned through the body portion and in contact with the translation member

wherein each of the at least two stabilizing members includes a substantially smooth portion and a threaded portion.

2. The device of claim 1, wherein the first endplate includes a textured outer surface for contacting a vertebral body.

3. The device of claim 1, wherein the first endplate includes at least one hole for receiving bone graft material.

4. The device of claim 1, wherein the translation member includes at least three angled ramping surfaces.

5. The device of claim 1, further comprising at least two stabilizing members positioned through the body portion and in contact with the translation member.

6. The device of claim 5, wherein the stabilizing members comprise a substantially smooth portion and a threaded portion.

7. The device of claim 1, wherein the actuation member comprises a threaded screw.

8. An expandable device comprising:

a first endplate;

a second endplate;

a body portion that extends along at least a length of the first endplate and the second endplate, the body portion including an interference nut;

a translation member receivable within the body portion in between the first endplate and the second endplate; and

an actuation member insertable through the body portion and into contact with the translation member,

further comprising at least two stabilizing members positioned through the body portion and in contact with the translation member

wherein the at least two stabilizing members each include a substantially smooth portion and a threaded portion.