An implant for use in spinal surgery comprises a resilient element having an inflatable cavity. It is formed of a biologically compatible material and is arranged for placement between end plates of adjacent vertebra. The implant may also include a wound disc replacement element. A method of performing...http://www.google.es/patents/US7338526?utm_source=gb-gplus-sharePatente US7338526 - Method and apparatus for computerized surgery
