Bone implant with osteo-inducing structure

A spine implant device system for a patient, comprising:

• a first implant segment, having a first selected thickness in a selected first axial direction and having at least a first annular region, a second annular region adjacent to and at least partially surrounding the first region, and a third annular region adjacent to and at least partially surrounding the second region, where at least the first region has a male extension in the first axial direction, and the second region has a female extension in the first axial direction;
• a second implant segment, having a second selected thickness in a selected second axial direction and having at least a fourth annular region, a fifth annular region adjacent to and at least partially surrounding the fourth region, and a sixth annular region adjacent to and at least partially surrounding the fifth region;
• and
• wherein at least the fourth region has a female extension in the second axial direction and the fifth region has a male extension in the second axial direction, where the first and fourth regions have a male-female interlocking relationship, and the fifth and second regions have a male-female interlocking relationship;
• and
• wherein at least one of the third and sixth regions has a perforation channel therein that extends between an exposed surface of at least one of the first and second segments and at least one of the second and fifth regions, whereby natural bone in the patient's body is encouraged to grow into the at least one perforation channel.