An attachment plate of an spinal disc comprising v-shaped self-tapping fixing ribs

摘要

An attachment plate forming part of an intervertebral prosthesis that includes two attachment plates is disclosed. The attachment plate comprises an attachment surface with fixing projections. The attachment surface is configured for attachment to an adjacent vertebral body, which has a base surface configured to bear on a endplate of the adjacent vertebral body. The fixing projections rise from the base surface wherein the fixing projections are arranged symmetrically about a medial plane in at least two rows with an interspace opening between the rows. The rows extend outwardly and obliquely in a V-shape with respect to an implantation direction. The fixing projections are configured with a first limit surface formed by a lateral-facing side surface, a second limit surface formed by a medial-facing side surface, a third limit surface formed by a steep ventral-facing surface, and a fourth limit surface formed by an inclined dorsal facing surface. The fixing projections are self tapping and configured to penetrate into the endplate of the adjacent vertebral body.