Patent ID: 8545567

Claim:
A spinal fusion device, comprising: a first endplate configured for fitting within a disc space and engaging with a first vertebra, wherein said first endplate has an anterior end and a posterior end; and a second endplate configured for fitting within said disc space and engaging with a second vertebra, wherein said second endplate has an anterior end and a posterior end, wherein said endplates are separated by a single spacer that maintains a pre-determined distance between said endplates, said spacer comprising: an anterior end; a posterior end; a first lateral side; a second lateral side, opposite to said first lateral side; a first surface that engages with said first endplate; a second surface that is opposite to said first surface and engages with said second endplate; and a first locking device that engages with said first endplate, wherein said first locking device comprises a rotating pin having a cylinder body and a protruding tab, wherein said rotating pin is rotatable between an unlocked position and a locked position, and wherein said protruding tab protrudes into a slot in said first endplate in said locked position to prevent relative movement between said spacer and said first endplate.