Interbody Spinal Implant Having a Roughened Surface Topography

An implant, comprising a body that is generally curved-shaped in transverse cross section and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, a sharp edge at the junction of the anterior portion and the top surface, a sharp edge at the junction of the anterior portion and the bottom surface, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having variable width or thickness and at least a portion with a roughened surface topography capable of gripping bone and inhibiting migration of the implant once the implant is inserted between adjacent vertebral endplates.

An implant, comprising a body that is generally rectangular-shaped in transverse cross section and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, a sharp edge on the top surface and on the bottom surface for digging into vertebral end plate bone and resisting expulsion of the implant from the intervertebral space, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having variable width or thickness and at least a portion with a roughened surface topography capable of gripping bone and inhibiting migration of the implant once the implant is inserted between adjacent vertebral endplates.

An implant, comprising a body that is generally oval-shaped in transverse cross section, and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a solid rear wall extending substantially the entire width and height of the body, a substantially hollow center, at least one sharp edge for digging into vertebral end plate bone and resisting expulsion of the implant, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having at least a portion with a roughened surface topography capable of gripping bone an inhibiting migration of the implant once the implant is inserted between adjacent vertebral endplates.

An implant, comprising a body that is generally box-shaped in transverse cross section, and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a solid rear wall extending substantially the entire width and height of the body, a substantially hollow center, at least one sharp edge for digging into vertebral end plate bone and resisting expulsion of the implant, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having at least a portion with a roughened surface topography capable of gripping bone an inhibiting migration of the implant once the implant is inserted between adjacent vertebral endplates.