Stand-alone fusion implant secured by in-line fixation

Patent metadata

Field	Value
Publication number	US-10034699-B2
Application number	US-201715402926-A
Country	US
Kind code	B2
Filing date	Jan 10, 2017
Priority date	Jan 14, 2016
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

Stand alone fusion cage assemblies that can be secured to the adjacent vertebral bodies via an in-line approach that is substantially perpendicular to the anterior wall of the stand alone cage (or substantially parallel to the cage insertion direction).

First claim

I claim:

1. An intervertebral assembly comprising:
an intervertebral fusion device having an anterior wall, a posterior wall, and first and second side walls connecting the anterior and posterior walls, an upper bearing surface and a lower bearing surface, the anterior wall having a height and an anterior surface, and a first threaded throughhole extending into the anterior wall from the anterior surface,
a fixation device comprising a proximal head and an intermediate flexible bellows having a corrugated wall comprising a helical threadform disposed in the first throughhole, wherein the helical threadform threadably mates with the first threaded throughhole.

2. The assembly of claim 1 wherein the proximal head of the device comprises an internal drive feature.

3. The assembly of claim 1 wherein the proximal head of the device comprises an axial through hole.

4. The assembly of claim 3 wherein the axial through hole is cylindrical.

5. The assembly of claim 3 wherein the axial through hole is frustoconical.

6. The assembly of claim 1 wherein the proximal head of the device is tapered and threaded.

7. The assembly of claim 1 wherein the proximal head of the device has a peripheral groove.

8. The assembly of claim 1 further comprising c) a guidewire extending through the fixation device.

9. The assembly of claim 8 further comprising d) a sleeve, wherein the guide wire extends through the sleeve.

10. The assembly of claim 9 further comprising e) a centering guide disposed in a hole in the intervertebral fusion device, wherein the sleeve extends through the centering guide.

11. The assembly of claim 1 wherein the device further comprises a distal tip.

12. The assembly of claim 11 wherein the distal tip has a tapered thread.

13. The assembly of claim 11 wherein the head, bellow and tip are independent elements joined by first and second joints.

Assignees

• Depuy Synthes Products Inc

Inventors

• Mazzuca Michael

Classifications

• A61B17/8635

  Tips of screws · CPC title

• A61B17/8605

  Heads, i.e. proximal ends projecting from bone · CPC title

• A61B17/8888

  at its central region · CPC title

• A61B17/8883

  the driver bit acting on the periphery of the screw head · CPC title

• A61B17/8685

  comprising multiple separate parts · CPC title