Spinal repositioning instrument, spinal repositioning system, and methods of using these

A spinal repositioning instrument comprising a first coupling body adapted for direct or indirect coupling to a pedicle screw, and a second coupling body adapted for direct or indirect coupling to another pedicle screw, wherein

• the spinal repositioning instrument is configured to perform a first movement for vertebral repositioning under which first movement the first and second coupling bodies are moved respectively for changing a distance between the pedicle screws when being coupled to the first and second coupling bodies and to perform a second movement for reduction independent from the first movement, under which second movement the coupling bodies are moved respectively for changing an angle between longitudinal axes of the pedicle screws when being coupled to the coupling bodies,
• a synchronizing mechanism or transmission is provided functionally linking the first and second coupling bodies with each other and being configured such that at least or exclusively the respective movements of the coupling bodies under the second movement are symmetrical to each other, and
• an adjustable linkage mechanism is provided connecting the two coupling bodies such that under the first movement the first and second coupling bodies perform a scissor-like pivoting about a first axis provided by the adjustable linkage mechanism in a first adjustment state of the adjustable linkage mechanism exclusively allowing a pivoting movement and under the second movement the first and second coupling bodies perform a rotation in opposite directions about respective second axes in a second adjustment state of the adjustable linkage mechanism allowing a translation movement of the first and second coupling bodies relative to each other wherein the respective second axes are relatively fixed to each other under the second movement.