23. The implant of claim 19 , wherein the second mount secures the second section of the deflection rod system to a middle portion of the horizontal rod and the horizontal rod is adapted to be secured at each end in fixed relationship to the vertebra by a bone anchor.
19. A spinal implant that is adapted to be mounted to a spine comprising: a deflection rod system including a first section and a second section; a horizontal rod adapted to be mounted to another implant that can be implanted in a vertebra; a first mount connected to the first section and adapted to secure the first section of the deflection rod system to a vertical rod which supports a load from an adjacent vertebra; a second mount connected to the second section which secures the second section of the deflection rod system to the horizontal rod; wherein the deflection rod system is adapted, by bending of the deflection rod system, to permit resilient deflection of the first mount relative to the horizontal rod and thereby support the load from the adjacent vertebra while accommodating relative movement between the vertebra and the adjacent vertebra; said deflection rod system including an inner rod and an outer shell; and wherein said inner rod is elongated and said outer shell is elongated along the elongated inner rod.