US Patent 7794500 Surgical implant

A surgical implant includes a first end plate having a substantially X-shaped configuration. A second end plate is spaced apart for the first end plate. A central longitudinal axis centrally extends between the first end plate and the second end plate. Four spaced apart beams extend from the first end plate to the second end plate at location spaced apart form the central longitudinal axis. An open passageway extends between each adjacent pair of the beams and intersects with the central longitudinal axis.