In-situ formed intervertebral fusion device and method

Patent metadata

Field	Value
Publication number	US-10420651-B2
Application number	US-201615226367-A
Country	US
Kind code	B2
Filing date	Aug 2, 2016
Priority date	Feb 14, 2003
Publication date	Sep 24, 2019
Grant date	Sep 24, 2019

Abstract

An orthopedic device for implanting between adjacent vertebrae comprising: an arcuate balloon and a hardenable material within said balloon.
In some embodiments, the balloon has a footprint that substantially corresponds to a perimeter of a vertebral endplate. An inflatable device is inserted through a cannula into an intervertebral space and oriented so that, upon expansion, a natural angle between vertebrae will be at least partially restored. At least one component selected from the group consisting of a load-bearing component and an osteobiologic component is directed into the inflatable device through a fluid communication means.

First claim

What is claimed is:

1. An expandable spinal fusion implant, comprising:
a) an upper endplate having an upper surface configured to engage bone and a lower surface;
b) a lower endplate having a lower surface configured to engage bone and an upper surface;
c) a core having a first mating surface that mates with the upper endplate via a slidable guide-track and a second mating surface that mates with the lower endplate via a slidable guide-track; and
d) an elongate metallic element extending longitudinally through the core;
wherein the core includes first and second opposed ramped surfaces;
wherein longitudinal translation of the ramped surfaces increases a height between the upper surface of the upper endplate and the lower surface of the lower endplate;
wherein the upper and lower endplates and the core are each arcuate in a plane parallel to their length.

2. The implant of claim 1 , wherein the core comprises upper and lower ramp components.

3. The implant of claim 1 , wherein a cross-section taken through the endplates and the core defines an I shape.

4. The implant of claim 1 , wherein the elongate metallic element does not contact either of the upper and lower endplates.

5. An expandable spinal fusion implant, comprising:
an upper endplate having an upper surface configured to engage bone;
a lower endplate having a lower surface configured to engage bone; and
a core positionable between the upper and lower endplates, the core including:
a first surface that includes a guide configured to slide within a track formed in the upper endplate;
a second surface that extends at an oblique angle with respect to the upper endplate;
a third surface that includes a guide configured to slide within a track formed in the lower endplate; and
a fourth surface that extends at an oblique angle with respect to the lower endplate;

wherein a height between the upper surface of the upper endplate and the lower surface of the lower endplate is expandable by ramping action of the second and fourth surfaces;
wherein the upper and lower endplates and the core are each arcuate in a plane parallel to their length.

6. The implant of claim 5 , wherein the core comprises upper and lower ramp components.

7. The implant of claim 5 , wherein the upper and lower endplates and the core are each arcuate along their length.

8. The implant of claim 5 , wherein a cross-section taken through the endplates and the core defines an I shape.

9. The implant of claim 5 , wherein the second and fourth surfaces bear against each other.

10. The implant of claim 5 , wherein the implant has a middle portion and opposed end portions, and wherein the middle portion has a greater height than the opposed end portions.

11. An expandable spinal fusion implant, comprising:
an upper endplate having an upper surface configured to engage bone;
a lower endplate having a lower surface configured to engage bone;
a first ramp surface extending at an angle relative to the upper surface of the upper endplate;
a second ramp surface extending at an angle relative to the lower surface of the lower endplate;
a first guide surface that mates with the upper endplate via a slidable guide track; and
a second guide surface that mates with the lower endplate via a slidable guide track;
wherein the first and second ramp surfaces are slidable with respect to one other to expand a height of the implant by longitudinal translating movement.

12. The implant of claim 11 , wherein the upper surface of the upper endplate and the lower surface of the lower endplate each include teeth extending therefrom for gripping bone.

13. The implant of claim 11 , wherein the upper surface of the upper endplate and the lower surface of the lower endplate each include openings to permit bony fusion therethrough.

14. The implant of claim 11 , wherein the implant has a middle portion and opposed end portions, and wherein the middle portion has a greater height than the opposed end portions.

15. An expandable spinal implant, comprising:
a top component having a track formed therein and an upper surface configured to engage a vertebral endplate;
a bottom component having a track formed therein and a lower surface configured to engage a vertebral endplate;
a first portion disposed between the top and bottom components, the first portion having a guide slidably-received within the track of the top component;
a second portion disposed between the top and bottom components, the second portion having a guide slidably-received within the track of the bottom component; and
first and second opposed ramping surfaces longitudinally slidable along one another to expand a height of the implant;
wherein the implant has a middle portion and opposed end portions, and wherein the middle portion has a greater height than the opposed end portions.

16. The implant of claim 15 , wherein the top and bottom components are arcuate along their respective lengths.

17. The implant of claim 15 , wherein a cross-section taken through the top component, the bottom component, and the first and second portions defines an I shape.

18. The implant of claim 15 , wherein the first ramping surface is formed on the first portion and the second ramping surface is formed on the second portion.

19. An expandable spinal implant, comprising:
a top component having a track formed therein and an upper surface configured to engage a vertebral endplate;
a bottom component having a track formed therein and a lower surface configured to engage a vertebral endplate;
a first portion disposed between the top and bottom components, the first portion having a guide slidably-received within the track of the top component;
a second portion disposed between the top and bottom components, the second portion having a guide slidably-received within the track of the bottom component; and
first and second opposed ramping surfaces longitudinally slidable along one another to expand a height of the implant;
wherein the top and bottom components are arcuate along their respective lengths.

Assignees

• Depuy Synthes Products Inc

Inventors

• Serhan Hassan
• Dimauro Thomas M
• Malone John Daniel

Classifications

• A61F2002/30953

  using a remote computer network, e.g. Internet · CPC title

• A61F2002/30593

  hollow · CPC title

• A61L27/52

  Hydrogels or hydrocolloids · CPC title

• A61F2002/30383

  made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove · CPC title

• A61F2210/0061

  swellable · CPC title