A stent, or device for repair and reconstruction of the spinal disc wall, or annulus fibrosus, after surgical incision or pathologic rupture, which is inserted through an aperture into the subannular space. The stent has radial extensions which are caused or allowed to expand into an expanded configuration...http://www.google.es/patents/US7670380?utm_source=gb-gplus-sharePatente US7670380 - Intervertebral disc annulus stent
