An allogenic implant (10; 40; 50; 70), particularly an allogenic intervertebral implant (10; 40; 50; 70; 80) for fusing vertebrae is disclosed. The implant (10; 40; 50; 70; 80) is a piece of allogenic bone conforming in size and shape with portions of end plates of a vertebrae. The implant (10; 40; 50; 70; 80) has a wedge-shaped profile to restore disc height and the natural curvature of the spine. The top and bottom surfaces (14; 16) of the implant have a plurality of teeth (12) to resist expulsion and provide initial stability. The implant (10; 40; 50; 70; 80) according to the present invention provides initial stability needed for fusion without stress shielding.