Spinal interbody implants

A spinal interbody implant comprising:

• a core portion having a first porosity, the core portion including a plurality of channels extending from a first outer surface of the core portion to a second outer surface of the core portion;
• a first material layer peripherally wrapped around the core portion, the first material layer having a second porosity greater than the first porosity;
• a second material layer at least partially enclosing the first material layer, the second material layer having a third porosity different from the second porosity;
• and
• an inner core portion disposed within an opening through the core portion, the opening defined by an inner wall of the core portion, wherein the inner core portion has the second porosity,
• wherein at least a portion of each of the core portion, the first material layer, and the second material layer are adapted to abut vertebral bodies when implanted.

An implant comprising:

• an outer shell;
• a fill material disposed within the outer shell;
• and
• a plurality of tubes extending from a first outer surface of the implant to a second outer surface of the implant through the fill material,
• wherein the fill material is more porous than the outer shell and the plurality of tubes, and
• wherein the plurality of tubes includes a first tube with a length entirely disposed within the fill material,
• wherein the plurality of tubes includes a second tube that extends through the outer shell and the fill material, and
• wherein the second tube is non-parallel to the first tube.