A spinal implant that has an adjustable rod that connects and stabilizes the vertebrae of a vertebral column. The implant has screws that are attached to the vertebrae. Each screw has a clamp with a first bore that allows the clamp to be placed over the screw. The first bore of the clamp is larger than...http://www.google.co.uk/patents/US5222954?utm_source=gb-gplus-sharePatent US5222954 - Spinal implant system and method for installing the implant
