Spinal fusion implant and related methods

• US 9,693,876 B1
• Filed: 04/01/2013
• Issued: 07/04/2017
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: Ali H. Mesiwala
• Original Assignee: Ali H. Mesiwala
• Inventors: Mesiwala, Ali H.
• Primary Examiner(s): Robert, Eduardo C
• Assistant Examiner(s): Eckman, Michelle C
• Application Number:
  US13/854,945
• Time in Patent Office: 1,555 Days
• Field of Search: 623 1711- 1716, 606 63, 606 68, 411 34, 411 37, 411 38
• CPC Class Codes: A61B 17/86 Pins or screws or threaded wires; nuts therefor A61B17/72 take precedence
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• 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 2002/30507 using a threaded locking member, e.g. a locking screw or a set screw
• CPC Class Codes: A61F 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/4627 with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument

Abstract

The present invention relates generally to medical devices and methods for use in spinal surgery. In particular, the disclosed system relates to an intervertebral spinal implant assembly sized and dimensioned for the lumbar or cervical spine implantable via an anterior approach. The device includes an implant, bone fasteners, and instruments for delivering the implant and bone screws.

Claims

1. A spinal fusion implant comprising:

a body having a top surface, a bottom surface, a fusion aperture defined by an anterior wall, a posterior wall, and first and second lateral side walls, said anterior wall including a threaded aperture extending therethrough;

a plurality of bone fasteners;

a drive screw; and

a substantially flat plate having an anterior surface and a posterior surface and being coupled to the plurality of bone fasteners such that the bone fasteners extend from a posterior surface of the plate, wherein the plate includes an aperture extending from the anterior surface and exiting exclusively through posterior surface configured to align with the threaded aperture of the anterior wall of the body and receive the drive screw therethrough;

wherein the anterior wall of the body comprises a plurality of bone fastener apertures extending through the interior of the body of the implant and exiting through one of the top and bottom surface, each of said apertures configured to receive a bone fastener therethrough, and wherein the plurality of bone fasteners are coupled to the plate prior to insertion of the plurality of bone fasteners and the drive screw into the spinal fusion implant, and the plurality of bone fasteners are configured to deploy through the spinal fusion implant as the drive screw is inserted and advanced into the threaded hole in the anterior wall of the spinal fusion implant.

2. The spinal fusion implant of claim 1, wherein the plurality of bone fasteners are configured to be deployed through the spinal fusion implant without rotating.

3. The spinal fusion implant of claim 1, wherein the plurality of bone fasteners are spikes.

4. The spinal fusion implant of claim 1, wherein the plurality of bone fasteners are coupled to the drive screw via a collar.

5. The spinal fusion implant of claim 1, wherein the plurality of bone fastener apertures extend through the anterior wall of the body at an angle that is oblique to a horizontal plane of the spinal fusion implant.

6. The spinal fusion implant of claim 1, wherein the anterior wall has a first height and the posterior wall has a second height, and wherein the first height is greater than the second height.

7. The spinal fusion implant of claim 1, wherein the fusion aperture is divided by a medial support extending from the anterior wall to the posterior wall.

8. The spinal fusion implant of claim 7, wherein the medial support further comprises a drive screw aperture configured to receive the drive screw.