Tissue Retraction And Vertebral Displacement Devices, Systems, And Methods For Posterior Spinal Fusion

A system for displacing vertebral bodies of a spine, comprising:

• a first extender extending along a longitudinal dimension between a proximal end and a distal end of the first extender, the distal end of the first extender having a first engagement portion configured to securely engage a first connecting element anchorable to a first vertebra of the spine, the first engagement portion configured to securely engage the first connecting element by forming a tubular passage around an outer perimeter of a first cage of the first connecting element, the first cage being coupled to a first pedicle screw of the first connecting element for anchoring the first connecting element to the first vertebra, and the first cage being configured to receive a spinal fusion rod and secure the spinal fusion rod to the first pedicle screw;
• a second extender extending along the longitudinal dimension between a proximal end and a distal end of the second extender, the distal end of the second extender having a second engagement portion configured to securely engage a second connecting element anchorable to a second vertebra of the spine, the second engagement portion configured to securely engage the second connecting element by forming a tubular passage around an outer perimeter of a second cage of the second connecting element, the second cage being coupled to a second pedicle screw of the second connecting element for anchoring the second connecting element to the second vertebra, and the second cage being configured to receive the spinal fusion rod and secure the spinal fusion rod to the second pedicle screw;
• and
• a manipulation device engageable with the first and second extenders, wherein the manipulation device is configured to displace the first and second vertebrae with respect to each other by inducing movement of the first extender with respect to the second extender when the first and second extenders are securely engaged with the anchored first and second connecting elements, respectively.