The invention relates to an artificial intervertebral disc for placement between adjacent vertebrae. The artificial intervertebral disc is preferably designed to restore disc height and natural disc curvature, allow for a natural range of motion, absorb shock and provide resistance to motion and axial...http://www.google.se/patents/US7563286?utm_source=gb-gplus-sharePatent US7563286 - Controlled artificial intervertebral disc implant
