1. An implant adapted to be implanted in a spine of a patient comprising: a shield with a shield cavity; a deflection rod that is mounted in said shield cavity; said deflection rod able to be deflected in said shield cavity and the motion of said deflection rod is limited by the shield cavity; a connector located at an end of said deflection rod; a rod connected to said connector; and a mount extending from said shield.
24. The implant of claim 1 wherein said shield cavity is asymmetrical.