1. A dynamic spine stabilization system comprising: a first horizontal rod having a first end and a second end; a mount extending from the first horizontal rod midway between the first end and the second end; a first bone anchor connectable to the first end of the first horizontal rod and configured to engage a first pedicle of a first vertebra, and a second bone anchor connectable to the second end of the second horizontal rod and configured to engage a second pedicle of the first vertebra; a second horizontal rod having a third end and a fourth end; a third bone anchor connectable to the third end of the second horizontal rod and configured to engage a third pedicle of a second vertebra, and a fourth bone anchor connectable to the fourth end of the second horizontal rod and configured to engage a fourth pedicle of the second vertebra; a deflection rod connected to the mount of the first horizontal rod, the deflection rod having a fifth end extending away from the mount substantially parallel to the first horizontal rod; and a vertical rod connected between the fifth end of the deflection rod and the second horizontal rod, and a pivotable joint located where the vertical rod is connected to the fifth end of the deflection rod; such that, when secured between the first vertebra and second vertebra, the vertical rod transmits load from the second vertebra to the deflection rod; the deflection rod transmits load to the mount; the mount transmits load to the first horizontal rod; and the first horizontal rod distributes said load to the first pedicle and the second pedicle of the first vertebra via the first bone anchor and the second bone anchor.
1. A dynamic spine stabilization system comprising: a first horizontal rod having a first end and a second end; a mount extending from the first horizontal rod midway between the first end and the second end; a first bone anchor connectable to the first end of the first horizontal rod and configured to engage a first pedicle of a first vertebra, and a second bone anchor connectable to the second end of the second horizontal rod and configured to engage a second pedicle of the first vertebra; a second horizontal rod having a third end and a fourth end; a third bone anchor connectable to the third end of the second horizontal rod and configured to engage a third pedicle of a second vertebra, and a fourth bone anchor connectable to the fourth end of the second horizontal rod and configured to engage a fourth pedicle of the second vertebra; a deflection rod connected to the mount of the first horizontal rod, the deflection rod having a fifth end extending away from the mount substantially parallel to the first horizontal rod; and a vertical rod connected between the fifth end of the deflection rod and the second horizontal rod, and a pivotable joint located where the vertical rod is connected to the fifth end of the deflection rod; such that, when secured between the first vertebra and second vertebra, the vertical rod transmits load from the second vertebra to the deflection rod; the deflection rod transmits load to the mount; the mount transmits load to the first horizontal rod; and the first horizontal rod distributes said load to the first pedicle and the second pedicle of the first vertebra via the first bone anchor and the second bone anchor. 18. The system of claim 1 wherein: the deflection rod is cantilever mounted to said first horizontal rod.