US Patent 7618454 Transforaminal lumbar interbody fusion spacers

An implant for spinal fusion that includes a top surface and a bottom surface opposing the top surface. An anterior surface extends from the top surface to the bottom surface and a posterior surface extends from the top surface to the bottom surface. The implant includes a first end, a second end, and a means for promoting spinal fusion. The implant may further include one or more of a cavity and a trough wherein bone growth material may be backed before or after the implant is inserted into the spine.