Methods of separating and/or supporting layers of tissue in the human spine. Such methods generally comprise inserting at least a distal end portion of a guide member between layers of tissue in the human spine wherein the distal end portion defines a predetermined shape. A distraction device is advanced...http://www.google.es/patents/US7963993?utm_source=gb-gplus-sharePatente US7963993 - Methods of distracting tissue layers of the human spine
Methods of distracting tissue layers of the human spine
