Spondylolisthesis reduction system and method
First Claim
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1. A spondylolisthesis reduction system for a patient'"'"'s spine comprising:
- a bone anchor implantable into a vertebral body of the patient'"'"'s spine;
the bone anchor having an upper rod receiving portion connected to a lower shank portion;
a guide tube having an upper portion and a lower portion with the lower portion connectable to the bone anchor;
the guide tube having a longitudinal opening;
an instrument connectable to the upper portion of the guide tube and configured to move the lower portion of the guide tube relative to the upper portion.
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Abstract
A percutaneous spondylolisthesis reduction instrument and method are disclosed for minimally invasive surgery. The spondylolisthesis reduction instrument includes tangs threadingly connected to an upper knob at the proximal end and configured to connect with a tower construct at the distal end. When connected to a tower which is attached to a bone fastener assembly implanted in a vertebral body, rotation of the upper knob retracts the tangs and the connected tower construct and vertebral body to reduce spondylolisthesis.
136 Citations
21 Claims
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1. A spondylolisthesis reduction system for a patient'"'"'s spine comprising:
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a bone anchor implantable into a vertebral body of the patient'"'"'s spine;
the bone anchor having an upper rod receiving portion connected to a lower shank portion;a guide tube having an upper portion and a lower portion with the lower portion connectable to the bone anchor;
the guide tube having a longitudinal opening;an instrument connectable to the upper portion of the guide tube and configured to move the lower portion of the guide tube relative to the upper portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A spondylolisthesis reduction system for a patient'"'"'s spine comprising:
an upper knob;
at least one hook connected to the upper knob and configured such that the at least one hook is capable of longitudinal translation relative to the upper knob;
the at least one hook configured to be connectable with a tower having a longitudinal opening;
the at least one hook configured to longitudinally translate a connected tower along with the longitudinal translation of the at least one hook;
the tower being configured to be connectable to a bone fastener assembly implanted in a vertebral body of the patient'"'"'s spine;
wherein translation of the at least one hook, connected tower and vertebral body relative to the upper knob reduces spondylolisthesis of the patient'"'"'s spine.- View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for reducing spondylolisthesis in a patient'"'"'s spine, comprising the steps of:
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providing at least a first bone anchor implanted in a first vertebral body; providing at least a second bone anchor implanted in a second vertebral body; providing a first tower; connecting a first tower to a first bone anchor; providing a second tower having at least one longitudinal opening, an upper portion and a lower portion; connecting a second tower to a second bone anchor; connecting the first tower to the upper portion of the second tower; providing an instrument comprising an upper portion connected to at least one prong; inserting the instrument into the second tower; connecting the at least one prong to the second tower; and moving the prong proximally to move the second tower, the connected second bone anchor, and the connected second vertebral body proximally to align the first and second vertebral bodies. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification