The present invention provides endoscopic instrumentation and surgical techniques especially useful for accessing at least a portion of an intervertebral disc. Vertebrae spreading instruments are provided for spreading adjacent vertebrae to facilitate access to the intervertebral disc are. The disclosed...http://www.google.com.au/patents/US5599279?utm_source=gb-gplus-sharePatent US5599279 - Surgical instruments and method useful for endoscopic spinal procedures
