An intervertebral implant, alone and in combination with an insertion tool for inserting same and a method for inserting same. The implant has upper and lower parts which have universal movement relative to each other. Each of the upper and lower parts also has a surface engaging an adjacent vertebrae....http://www.google.com.au/patents/US7204852?utm_source=gb-gplus-sharePatent US7204852 - Intervertebral implant, insertion tool and method of inserting same
