Bone graft and method of making and using same

A spinal bone graft for implantation into a host, the spinal bone graft comprising:

• one or more cortical bone portions forming a first unit, the first unit comprising a first bone engagement surface for contacting a bone of the host, and a first mating surface opposite the first bone engagement surface, the first mating surface forming at least one first undercut;
• one or more cortical bone portions forming a second unit, the second unit comprising a second bone engagement surface for contacting a bone of the host, and a second mating surface opposite the second bone engagement surface, the second mating surface forming at least one second undercut;
• at least one connector having a cross section, the cross section comprising a first end, a second end and middle portion between the first end and the second end;
• the first end of the at least one connector comprising one or more lateral projections such that a width of the first end is greater than a maximum width of the middle portion;
• the second end of the at least one connector comprising one or more lateral projections such that a width of the second end is greater than the maximum width of the middle portion;
• the at least one first undercut having a cross section configured to mate with the cross section of the at least one connector at the first end to receive the first end of the at least one connector in an interlocking fit,
• the at least one second undercut having a cross section configured to mate with the cross section of the at least one connector at the second end to receive the second end of the at least one connector in an interlocking fit,
• the at least one connector configured to mate with the at least one first undercut and the at least one second undercut to interconnect the first unit and the second unit together with the first mating surface in direct contact with the second mating surface,
• the at least one connector preventing separation of the first unit and the second unit in response to tensile force, and
• the at least one connector having an end face that is recessed inside a socket, forming an indent for engagement with a surgical instrument or clamping element.