Spinal implant with porous and solid surfaces

Patent metadata

Field	Value
Publication number	US-12268613-B2
Application number	US-202117225393-A
Country	US
Kind code	B2
Filing date	Apr 8, 2021
Priority date	Jan 14, 2015
Publication date	Apr 8, 2025
Grant date	Apr 8, 2025

Abstract

A spinal implant including porous and solid portions is disclosed. The implant includes porous portions on upper and lower surfaces and in an interior thereof. Methods of manufacturing and implanting such implants are also disclosed.

First claim

The invention claimed is:

1. A spinal implant comprising:
an upper surface including a first porous portion forming a first porous surface and a first non-porous portion forming a first non-porous surface;
a lower surface including a second porous portion and a second non-porous portion; a cavity formed through the upper and lower surfaces;
first and second side walls extending between the upper and lower surfaces;
a front section extending between the upper and lower surfaces,
a rear section extending between the upper and lower surfaces, the first non-porous portion being interposed between the first porous portion at the rear section, the first porous portion extending from the first non-porous portion at the rear section to the first side wall, and
a first chamfered section extending between the first side wall and the rear section and a second chamfered section extending between the second side wall and the rear section.

2. The spinal implant of claim 1 , wherein the second non-porous portion is interposed between the second porous portion at the rear section.

3. The spinal implant of claim 1 , wherein the front section is tapered to define a wedge-shaped end.

4. The spinal implant of claim 3 , wherein the wedge-shaped end is configured to distract vertebral bodies during insertion of the spinal implant.

5. The spinal implant of claim 1 , wherein the rear section includes an opening extending into the spinal implant.

6. The spinal implant of claim 5 , wherein the opening is a threaded opening.

7. The spinal implant of claim 6 , wherein the threaded opening and the first and second chamfer are configured to cooperate with an insertion tool for insertion of the spinal implant at a surgical site.

8. The spinal implant of claim 1 , wherein the front section is non-porous.

9. A spinal implant comprising:
a body having a front end, a rear end and opposed side walls extending between the ends, the body having an outer perimeter and an inner perimeter about a cavity, the body comprising:
an upper surface and a lower surface, the upper surface defined by a non-porous upper outer rim forming a first non-porous exterior surface and the lower surface defined by a non-porous lower outer rim forming a second non-porous exterior surface;
a non-porous front wall extending at the front end between at least the upper outer rim and the lower outer rim;
a non-porous rear wall extending at the rear end between at least the upper outer rim and the lower outer rim;
each of the side walls including at least one non-porous strut extending therebetween; and
a porous structure integrally formed with the upper rim, the lower rim and the at least one strut, the porous structure extending from the body outer perimeter to the body inner perimeter such that the porous structure is encased within a non-porous structure.

10. The spinal implant of claim 9 , wherein the upper surface and lower surface comprise surface serrations, and wherein a contour of each surface serration is defined by a non-porous cross strut and a curved contoured portion.

11. The spinal implant of claim 9 , wherein the inner perimeter is defined by porous and non-porous sections.

12. The spinal implant of claim 9 , wherein the at least one non-porous strut contacts the opposed side walls.

13. The spinal implant of claim 12 , wherein the at least one non-porous strut contacts the cavity.

14. The spinal implant of claim 9 , wherein each of the side walls include openings extending into the cavity.

15. The spinal implant of claim 14 , wherein each of the openings include porous and non-porous sections.

16. The spinal implant of claim 9 , wherein the porous structure has an average pore diameter between 100 and 1000 microns.

17. The spinal implant of claim 9 , wherein the porous structure has an average porosity between 30% and 80%.

Assignees

• Stryker European Operations Holdings Llc

Inventors

• Willis Steven
• Zielinska Justyna
• Stamp Robin
• Ngo Chau

Classifications

• B22F10/20

  Direct sintering or melting · CPC title

• A61F2002/30593

  hollow · CPC title

• A61F2002/30011

  differing in porosity · CPC title

• A61F2002/30985

  using three dimensional printing [3DP] · CPC title

• A61F2/4611

  of spinal prostheses · CPC title