Patent ID: 8690949

Claim:
An intervertebral implant comprising: a three-dimensional substantially kidney bean-shaped body comprising a concave arcuate posterior face comprising a curve extending substantially the length of the longitudinal axis of the implant body and a convex arcuate anterior face comprising a curve extending substantially the length of the longitudinal axis of the implant body, wherein the distance between the posterior face and the anterior face defines a width of the body; a superior face and an inferior face for contacting at least a portion of a first and a second vertebrae, wherein the distance between the superior face and the inferior face defines a thickness of the body and, at least one of the superior and inferior faces includes a plurality of undulating surfaces to resist migration of the implant when the implant is implanted between two vertebrae; and a curved first end portion and a curved second end portion connecting the posterior and anterior faces, wherein the distance between the first and second end portions defines a length of the body that is greater than the width of the body, the thickness of the body is greatest at the mid-section and tapers toward each end portion and, at least one of the first end portion and the second end portion comprises a chamfered edge on at least one of the superior face and the inferior face.