SPINAL IMPLANT WITH POROUS AND SOLID SURFACES

• US 20160199193A1
• Filed: 01/13/2016
• Published: 07/14/2016
• Est. Priority Date: 01/14/2015
• Status: Active Grant

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Stryker European Holdings I, LLC (Stryker Corporation)
• Inventors: Willis, Steven, Zielinska, Justyna
• Granted Patent: US 10,182,923 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2/3094 Designing or manufacturing processes
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• 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 2002/30011 differing in porosity
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30772 Apertures or holes, e.g. of circular cross section
• CPC Class Codes: A61F 2002/30784 Plurality of holes
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/3092 having an open-celled or open-pored structure
• CPC Class Codes: A61F 2002/3093 for promoting ingrowth of bone tissue
• CPC Class Codes: A61F 2002/30962 using stereolithography
• CPC Class Codes: A61F 2002/30985 using three dimensional printing [3DP]
• CPC Class Codes: B22F 10/20 Direct sintering or melting
• CPC Class Codes: B22F 2003/247 Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
• CPC Class Codes: B22F 2005/005 Article surface comprising protrusions
• CPC Class Codes: B22F 3/24 After-treatment of workpieces or articles B22F3/1146 takes precedence
• CPC Class Codes: B22F 5/10 of articles with cavities or holes, not otherwise provided for in the preceding subgroups
• CPC Class Codes: B22F 7/002 of porous nature
• CPC Class Codes: B22F 7/08 : with one or more parts not made from powder B22F7/062 takes precedence
• CPC Class Codes: B33Y 10/00 : Processes of additive manufacturing
• CPC Class Codes: B33Y 80/00 : Products made by additive manufacturing
• CPC Class Codes: C22C 1/0458 : Alloys based on titanium, zirconium or hafnium
• CPC Class Codes: Y02P 10/25 : Process efficiency

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.

Claims

1. A spinal implant comprising:

an upper surface including a first porous portion and first solid portion;

a lower surface including a second porous portion and a second solid portion; and

a cavity formed through the upper and lower surfaces, the cavity including a third porous portion.

2. The spinal implant of claim 1, further including a nose having a solid exterior, a hollow area and a porous region.

3. The spinal implant of claim 1, further including at least one serration on each of the upper and lower surfaces, the at least one serration including a solid tip, a solid root and a porous section.

4. The spinal implant of claim 1, further including first and second side walls extending between the upper and lower surfaces, the side walls including a solid exterior surface and a porous interior surface.

5. The spinal implant of claim 4, wherein the first and second side walls each include lateral windows.

6. The spinal implant of claim 5, wherein the lateral windows reduce the stiffness of the implant.

7. The spinal implant of claim 6, wherein the lateral windows taper.

8. The spinal implant of claim 1, further comprising a a threaded opening at a rear end.

9. The spinal implant of claim 1, wherein the implant is constructed of a metal.

10. The spinal implant of claim 9, wherein the metal is titanium.

11. The spinal implant of claim 1, wherein the implant is configured for insertion from a posterior approach, a lateral approach or an anterior approach.

12. The spinal implant of claim 1, further including a nose that facilitates the insertion of the implant in a first orientation and rotation to a second orientation.

13. The spinal implant of claim 12, wherein the nose has a solid exterior.

14. The spinal implant of claim 1, wherein the implant is constructed from an additive manufacturing process.

15. The spinal implant of claim 14, wherein the implant is machined to create smooth surfaces.