The present application is directed to interbody spinal fusion implants
having a structural configuration that provides for the maintaining and
creating of the normal anatomic angular relationship of two adjacent
vertebrae of the spine to maintain and create spinal lordosis. The spinal
fusion implants are sized to fit within the disc space created by the
removal of disc material between two adjacent vertebrae and conform
wholly or in part to the disc space created. The spinal fusion implants
of the present invention have upper and lower surfaces that form a
support structure for bearing against the end plates of the adjacent
vertebrae. The upper and lower surfaces are disposed in a converging
angular relationship to each other such that the implants have an overall
"wedged-shape" in an elevational side view. The angular relationship of
the upper and lower surfaces places and maintains the vertebrae adjacent
to those surfaces in an angular relationship to each other, creating and
maintaining the desired lordosis.