An artificial spinal disc implant (100) is provided that may be implanted between adjacent vertebrae in the spine to replace, repair or augment a natural spinal disc. The spinal disc implant may be characterized by one or more biomechanical properties that approximate those of natural spinal disc. The implant is also designed to be sufficiently secured to the vertebrae so that it may function in the body for long time periods. The endplate of the implant comprises a series of arrangements of fixation elements (111 A-F). The volume of the fixation elements which are closer to the posterior side of the implant is greater than the volume of the other fixation elements.
