Endplate-preserving spinal implant having a raised expulsion-resistant edge

An interbody spinal implant, comprising:

• a body having a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, and a single vertical aperture extending from the top surface to the bottom surface, having a size and shape for maximizing the surface area of the top surface and the bottom surface available proximate the anterior and posterior portions, defining a transverse rim with a varying width or thickness, and having a maximum width at its center;
• a first integration plate having a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, and a single vertical aperture extending from the top surface to the bottom surface and aligning with the single vertical aperture of the body, defining a transverse rim with a varying width or thickness, and having a maximum width at its center, affixed to the top surface of the body;
• and
• optionally, a second integration plate having a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, and a single vertical aperture extending from the top surface to the bottom surface and aligning with the single vertical aperture of the body, defining a transverse rim with a varying width or thickness, and having a maximum width at its center, affixed to the bottom surface of the body;
• wherein the top surface of the first integration plate has a roughened surface topography adapted to grip bone and inhibit migration of the implant and has a first anti-expulsion edge protruding above the horizontal plane of the top surface of the body, and
• wherein the top surface of the optional second integration plate has a roughened surface topography adapted to grip bone and inhibit migration of the implant and optionally has a second anti-expulsion edge protruding above the horizontal plane of the bottom surface of the body.