Allograft intervertebral implant and method of manufacturing the same

An allograft intervertebral implant sized and configured for implantation between first and second adjacent vertebra via a transforaminal lumbar interbody fusion technique, the implant comprising:

• an allograft body formed from at least two pieces of allograft bone, the body including a curved front surface, a curved back surface, a pair of ends separating the curved front and back surfaces, an upper surface and a lower surface wherein the upper and lower surfaces are sized and configured for contacting at least a portion of the first and second vertebrae, the curved front and back surfaces defining an outer perimeter of the implant, at least one vertical through-bore extending from the upper surface to the lower surface, the vertical through-bore being sized and configured to receive bone graft material;
• wherein the at least two pieces of allograft bone are joined together by a dovetail joint, the dovetail joint having a curved shape that substantially follows the contours of the curved front and back surfaces of the body.

An allograft intervertebral implant sized and configured for implantation between first and second adjacent vertebra via a transforaminal lumbar interbody fusion technique, the implant comprising:

• an allograft body formed from at least two pieces of allograft bone, the body including a curved front surface, a curved back surface, a pair of ends separating the curved front and back surfaces, an upper surface and a lower surface wherein the upper and lower surfaces are sized and configured for contacting at least a portion of the first and second vertebrae, the curved front and back surfaces defining an outer perimeter of the implant, at least one vertical through-bore extending from the upper surface to the lower surface, the vertical through-bore being sized and configured to receive bone graft material, and at least one substantially vertical hole at least partially formed in each of the at least two pieces of allograft bone, the hole being sized and configured to receive at least one pin for further securing the pieces of allograft bone together;
• wherein the at least two pieces of allograft bone are joined together by a dovetail joint, the dovetail joint having a curved shape that substantially follows the contours of the curved front and back surfaces of the body.

An allograft intervertebral implant sized and configured for implantation between first and second adjacent vertebra via a posterior lumbar interbody fusion procedure, the implant comprising:

• an allograft body formed from at least two pieces of allograft bone, the body including an anterior surface, a posterior surface, a pair of lateral side surfaces, an upper surface and a lower surface wherein the upper and lower surfaces are sized and configured for contacting at least a portion of the first and second vertebrae;
• wherein the at least two pieces of allograft bone are joined together by at least one dovetail joint, the at least one dovetail joint being orientated substantially transverse to a longitudinal axis of the body.

The allograft implant of 14, wherein the allograft body further includes at least one vertical through-bore extending from the upper surface to the lower surface, the vertical through-bore being sized and configured to receive bone graft material.

The allograft implant of 15, wherein the pieces of allograft bone each include at least one hole at least partially formed therein, the hole being sized and configured to receive at least one pin for further securing the pieces of allograft together.