Spinal implant with porous and solid surfaces

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;

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

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, the solid root extending away from the solid tip and defining a length greater than a thickness of the solid root.

2. 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.

3. The spinal implant of claim 2 , wherein the first and second side walls each include lateral windows.

4. The spinal implant of claim 3 , wherein the lateral windows reduce the stiffness of the implant.

5. The spinal implant of claim 4 , wherein the lateral windows taper.

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

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

8. The spinal implant of claim 7 , wherein the metal is titanium.

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

10. 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.

11. The spinal implant of claim 10 , wherein the nose has a solid exterior.

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

13. The spinal implant of claim 12 , wherein the implant is machined to create smooth surfaces.