Intervertebral spinal implant

Patent metadata

Field	Value
Publication number	US-2023338163-A1
Application number	US-202318342850-A
Country	US
Kind code	A1
Filing date	Jun 28, 2023
Priority date	May 8, 2018
Publication date	Oct 26, 2023
Grant date	—

Abstract

An intervertebral implant for implantation in an intervertebral space between vertebrae. The implant includes a body extending from an upper surface to a lower surface. The body has a front end, a rear end and a pair of spaced apart first and second side walls extending between the front and rear walls such that an internal chamber is defined within the front and rear ends and the first and second walls. The body defines an outer perimeter and an inner perimeter extending about the internal chamber. At least one of the side walls is defined by an integral porous structure.

First claim

What is claimed is:

1 . A corpectomy implant comprising:
an inner cylindrical member defining a hollow inner chamber and having a first end plate adapted to engage a surface of a first vertebral body; an outer cylindrical member defining a hollow inner chamber and having a second end plate adapted to engage a surface of a second vertebral body, the outer cylinder telescopingly receiving the inner member; a porous structure disposed in the inner chamber of the inner cylindrical member for encouraging bone growth, wherein the inner cylindrical member and the porous structure are 3D printed structures containing the same 3D printing material and the porous structure is formed integrally with the inner cylindrical member.

2 . The corpectomy implant of claim 1 , wherein the porous structure is a 3D printed porous lattice structure.

3 . The corpectomy implant of claim 1 , wherein the porous structure is a 3D printed porous structure, which has been modeled after the bone structure of the patient.

4 . The corpectomy implant of claim 1 , wherein the porous structure has interconnected pores that are in the range of 300-800 um in diameter.

5 . The corpectomy implant of claim 1 , wherein the porous structure porosity is approximately 70%.

6 . The corpectomy implant of claim 1 , wherein the porous structure has interconnected pores that are in the range of 300-800 um in diameter and the pores have a randomized pattern.

7 . The corpectomy implant of claim 1 , wherein at least one of the first and second end plates have an opening through which graft material is received.

8 . The corpectomy implant of claim 1 , wherein the inner member includes outer threads that engage with inner threads of a gear.

9 . The corpectomy implant of claim 8 , wherein:
the inner member includes outer threads that engage with inner threads of the gear; and the gear is positioned between an outer wall of the inner cylindrical member and an inner wall of the outer cylindrical member.

10 . A corpectomy implant comprising:
an inner cylindrical member defining a hollow inner chamber and having a first end plate adapted to engage a surface of a first vertebral body, the inner cylindrical member having an outer threading; an outer cylindrical member defining a hollow inner chamber and having a second end plate adapted to engage a surface of a second vertebral body, the outer cylinder telescopingly receiving the inner member, the inner and outer cylindrical members adapted to be positioned in a space occupied by a removed vertebral body; a 3D printed porous structure disposed in the inner chamber of the inner cylindrical member, wherein the inner cylindrical member and the porous structures contain the same 3D printing material and the porous structure is formed and 3D printed integrally with the inner cylindrical member.

11 . The corpectomy implant of claim 11 , wherein the porous structure is a customized 3D printed porous structure, which has been modeled after the bone structure of the patient.

12 . The corpectomy implant of claim 11 , wherein the porous structure has interconnected pores that are in the range of 300-800 um in diameter.

13 . The corpectomy implant of claim 11 , wherein at least one of the first and second end plates have an opening through which graft material is received.

14 . The corpectomy implant of claim 11 , wherein the porous structure has interconnected pores that are in the range of 300-800 um in diameter and the pores have a repeating pattern.

15 . The corpectomy implant of claim 11 , wherein the 3D printed porous structure is a porous lattice structure having interconnected pores that are in the range of 300-800 um in diameter.

Assignees

• Globus Medical Inc

Inventors

• Ryan Robert
• Flint Brian
• Miccio Mark
• Petersheim Samuel
• Brennan Tracy

Classifications

• A61F2/447 Primary

  substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section · CPC title

• A61F2/4611

  of spinal prostheses · CPC title

• A61F2/442

  Intervertebral or spinal discs, e.g. resilient (non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455) · CPC title

• A61F2/30771

  applied in original prostheses, e.g. holes or grooves · CPC title

• A61F2310/00023

  Titanium or titanium-based alloys, e.g. Ti-Ni alloys · CPC title