The present invention provides an injectable annular ring useful in treating a deteriorating spinal disc. When used, the annular ring may be collapsed or folded in order for it to be placed through a small opening in a prepared intervertebral space within the annulus using minimally invasive techniques....http://www.google.es/patents/US8007535?utm_source=gb-gplus-sharePatente US8007535 - Interbody fusion ring and method of using the same
Interbody fusion ring and method of using the same